- Collection:
- Georgia Government Publications
- Title:
- Total maximum daily load evaluation for forty-one stream segments in the Ocmulgee River basin for sediment (biota impacted)
- Creator:
- Georgia. Department of Natural Resources. Environmental Protection Division
- Publisher:
- Place of publication : Georgia. Dept. of Natural Resources. Environmental Protection Division., Atlanta, GA, 2001-06
- Date of Original:
- 2001-06
- Subject:
- Georgia
- Location:
- United States, Georgia, 32.75042, -83.50018
- Medium:
- state government records
- Type:
- Text
- Format:
- application/pdf
- Description:
- Electronic text
The Adobe Acrobat "find" command (binoculars icon) may be used to search these PDF files - External Identifiers:
- Call Number GA N200.E5 M1 2001 O25
- Metadata URL:
- https://dlg.galileo.usg.edu/id:dlg_ggpd_s-ga-bn200-pe5-bm1-b2001-bo25-belec-p-btext
- Digital Object URL:
- https://dlg.galileo.usg.edu/do:dlg_ggpd_s-ga-bn200-pe5-bm1-b2001-bo25-belec-p-btext
- Extent:
- 125 p.
- Holding Institution:
- University of Georgia. Map and Government Information Library
- Rights:
-
Total Maximum Daily Load
Evaluation
for
Forty-One Stream Segments
in the Ocmulgee River Basin
For Sediment
(Biota Impacted)
Submitted to: The U.S. Environmental Protection Agency
Region 4 Atlanta, Georgia
Submitted by: The Georgia Department of Natural Resources
Environmental Protection Division Atlanta, Georgia
June 2001
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Table of Contents
Section
Page
EXECUTIVE SUMMARY.................................................................................................................. iv
1.0 INTRODUCTION.......................................................................................................................1 1.1 Background ..........................................................................................................................1 1.2 Watershed Description ........................................................................................................1 1.3 Water Quality Standard........................................................................................................4
2.0 WATER QUALITY ASSESSMENT .........................................................................................11 2.1 Fish Sampling ....................................................................................................................11 2.2 Macroinvertebrate Sampling ..............................................................................................12
3.0 SOURCE ASSESSMENT .......................................................................................................28 3.1 Point Source Assessment .................................................................................................28 3.2 Nonpoint Source Assessment ...........................................................................................29
4.0 MODELING APPROACH........................................................................................................35 4.1 Model Selection ..................................................................................................................35 4.2 Universal Soil Loss Equation..............................................................................................35 4.3 WCS Sediment Tool .........................................................................................................38
5.0 TOTAL MAXIMUM DAILY LOADS ...........................................................................................40 5.1 Waste Load Allocations .....................................................................................................40 5.2 Load Allocations .................................................................................................................41 5.3 Seasonal Variation .............................................................................................................41 5.4 Margin of Safety..................................................................................................................46
6.0 RECOMMENDATIONS.........................................................................................................47 6.1 Monitoring ...........................................................................................................................47 6.2 Best Management Practices..............................................................................................47 6.3 Reasonable Assurance......................................................................................................54 6.4 Public Participation.............................................................................................................54
REFERENCES ..............................................................................................................................55
Georgia Environmental Protection Division
Atlanta, Georgia
iii
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
List of Tables
1. Summary of Current Conditions in Ocmulgee River Basin 2. 303(d) Listed Stream Segments located in the Ocmulgee River Basin 3. Land Use Distribution 4. Land Use Percentage 5. Soil Type Distribution 6. 1998-1999 WRD's Fish Community Study Scores 7. 1998-1999 WRD's Habitat Assessment Scores 8. 1998-1999 WRD's Field Measurements 9. 1999 EPD's Field Measurements and Water Chemistry 10. 1999 EPD's Macroinvertebrate Community Study Scores 11. 1999 EPD's Habitat Assessment Scores 12. Pebble Counts 13. NPDES Permit Limits for Facilities in the Impaired Watersheds of the Ocmulgee River Basin 14. Percent Timberland and Percent Harvested per Year by County 15. Mines Located in the Ocmulgee River Basin Watersheds 16. Cropland and Pasture C factors by County 17. Road C factors 18. Various Land Use C factors 19. Waste Load Allocations 20. Sediment Load Allocations 21. Sediment Load Percentages
List of Figures 1. Impaired and Unimpaired Watersheds Monitored in the Ocmulgee the River Basin
A: TMDL Summary Memorandum
Appendix
Georgia Environmental Protection Division
Atlanta, Georgia
iv
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
EXECUTIVE SUMMARY
The State of Georgia assesses its water bodies for compliance with water quality standards criteria established for their designated uses as required by the Federal Clean Water Act (CWA). Assessed water bodies are placed into three categories, supporting, partially supporting, or not supporting their designated uses depending on water quality assessment results. These water bodies are found on Georgia's 305(b) list as required by that section of the CWA that defines the assessment process, and are published in Water Quality in Georgia every two years.
Some of the 305(b) partially and not supporting water bodies are also assigned to Georgia's 303(d) list, also named after that section of the CWA. Water bodies on the 303(d) list are required to have a Total Maximum Daily Load (TMDL) evaluation for the water quality constituent(s) in violation of the water quality standard. The TMDL process establishes the allowable pollutant loadings or other quantifiable parameters for a water body based on the relationship between pollutant sources and in-stream water quality conditions. This allows water quality-based controls to be developed to reduce pollution and restore and maintain water quality.
The State of Georgia has identified 42 stream segments located in the Ocmulgee River Basin as being Biota Impacted and not meeting their water quality standard criteria. The water use classification of all of the impacted streams is Fishing. The general water quality criteria not being met states:
The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
The Biota Impacted designation indicates that studies have shown a modification of the biological community, more specifically, fish. In 1990, 1998, and 1999, the Department of Natural Resources (DNR) Wildlife Resources Division (WRD) conducted studies of fish populations. WRD used the Index of Biotic Integrity (IBI) and modified Index of Well-Being (IWB) to identify affected fish populations. The IBI and IWB values were used to classify the population as Excellent, Good, Fair, Poor, or Very Poor. Stream segments with fish populations rated as Poor or Very Poor were included in the partially supporting list. As a result, 42 stream segments in the Ocmulgee River Basin were added to the State's 303(d) list and scheduled for a TMDL evaluation. Thirty-eight stream segments, assessed and rated as Excellent, Good, and/or Fair, were considered as supporting uses.
The general cause of low IBI scores is the lack of fish habitat due to stream sedimentation. To determine the relationship between the in-stream water quality and the source loadings, each watershed was modeled. The analysis performed to develop sediment TMDLs for the 303(d) listed watersheds utilized the Universal Soil Loss Equation (USLE). The USLE predicts the average annual soil loss caused by erosion. The USLE method considered the characteristics of the watershed including land use, soil type, ground slope, and road surface. National Pollutant Discharge Elimination System (NPDES) permitted discharges were also considered. Modeling assumptions were considered conservative and provide the necessary implicit margin of safety for the TMDL.
The USLE was applied to the WRD watersheds designated on the 303(d) list as biologically impacted and those that were not, to determine the current sediment loading rates to the
Georgia Environmental Protection Division
Atlanta, Georgia
v
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
streams. A comparison of watershed sediment loading rates can be used to determine if current conditions are the source of excessive stream sedimentation. The average sediment load in those watersheds on the 303(d) list is 4.2 tons/acre/yr, ranging from 0.2 to 62.8 tons/acre/yr. The average sediment load in the watersheds not on the 303(d) list is 3.0 tons/acre/yr, ranging from 0.2 to 15.0 tons/acre/yr. These values represent sediment load contributions from all land uses within unimpaired watersheds. Note that the average annual sediment loads for both watershed groups are generally within the same range.
Table 1 shows that approximately 72.8 percent of the average sediment load in the Ocmulgee River Basin results from row crops having an average sediment load of 37.3 tons/acre/yr. Approximately 4.0 percent of the total sediment load is from pastureland with an average load on 0.9 tons/acre/yr. In the Ocmulgee River Basin, mining activities contribute approximately 11.8 percent of the total sediment load with an average load of 108.6 tons/acre/yr. Roads contribute approximately 5.8 percent of the total sediment load, forests make up about 1.4 percent of the total load with an average load of 0.1 tons/acre/year, and urban land contributes approximately 1.6 percent of the total sediment load with an average load of 2.2 tons/acre/yr. Estimates of the sediment contribution from construction are not available, but could represent a relatively high sediment load per acre.
Table 1. Summary of Current Conditions in the Ocmulgee River Basin
Land Use
Open Water Urban Bare Rock, Sand and Clay Quarries, Strip Mines, Gravel Pits Transitional Land Forest Pasture/Hay Row Crops Grasses, Wetland Roads
Average
Average
Average Percent Percent
Sediment
Land Use Sediment Load Load
(tons/acre/yr)
0.6%
0.0%
0.0
2.0%
1.6%
2.2
0.0%
0.0%
0.0
0.2%
11.8%
180.6
1.3%
0.2%
0.4
75.0%
1.4%
0.1
12.1%
4.0%
0.9
5.3%
72.8%
37.3
3.5%
2.4%
1.9
5.8%
These data indicate that row crops are the major source of sediment to our rivers and streams. However, over the last century there has been a dramatic decrease in the amount of land farmed in Georgia. Since 1950, there has been a 57 percent reduction in farmland. With the reduction in farmland, there has also been a decrease in the amount of soil erosion. This suggests that the sedimentation observed in the impaired stream segments may be legacy sediment resulting from past land use practices. It is believed that if sediment loads are maintained at acceptable levels, streams will repair themselves over time.
Georgia Environmental Protection Division
Atlanta, Georgia
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Management practices that may be used to help maintain the average annual sediment loads at current levels include:
Compliance with the requirements of the NPDES permit program Implementation of GFC Best Management Practices for forestry Adoption of NRCS Conservation Practices Adherence to the Mined Land Use Plan prepared as part of the Surface Mining Permit
Application Adoption of proper unpaved road maintenance practices Implementation of Erosion and Sedimentation Control Plans for land disturbing activities Evaluation of the effects of increased flow due to urban runoff on stream bank erosion
Although the measurement of sediment delivered to a stream is difficult to determine, by monitoring the implementation of these practices, their anticipated effects will contribute to improving stream habitats and water quality, and thus be an indirect measurement of the TMDLs.
Georgia Environmental Protection Division
Atlanta, Georgia
vii
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
1.1 Background
1.0 INTRODUCTION
June 2001
The State of Georgia assesses its water bodies for compliance with water quality standards criteria established for their designated uses as required by the Federal Clean Water Act (CWA). Assessed water bodies are placed into three categories, supporting, partially supporting, or not supporting their designated uses depending on water quality assessment results. These water bodies are found on Georgia's 305(b) list as required by that section of the CWA that addresses the assessment process, and are published in Water Quality in Georgia every two years.
Some of the 305(b) partially and not supporting water bodies are also assigned to Georgia's 303(d) list, also named after that section of the CWA. Water bodies on the 303(d) list are required to have a Total Maximum Daily Load (TMDL) evaluation for the water quality constituent(s) in violation of the water quality standard. The TMDL process establishes the allowable loading of pollutants or other quantifiable parameters for a water body based on the relationship between pollution sources and in-stream water quality conditions. This allows water quality based controls to be developed to reduce pollution and restore and maintain water quality.
In 1990, 1998, and 1999, the Department of Natural Resources (DNR) Wildlife Resources Division (WRD) conducted studies of fish populations at a number of monitoring sites in the Ocmulgee River Basin. WRD used the Index of Biotic Integrity (IBI) and modified Index of WellBeing (IWB) to identify affected fish populations. The IBI and IWB values were used to classify the populations as Excellent, Good, Fair, Poor, or Very Poor. Stream segments with fish populations rated as Poor or Very Poor were listed as Biota Impacted. The Biota Impacted designation indicates that studies have shown a significant modification of the biological community. Forty-one stream segments (see Table 2) were rated as Poor or Very Poor, placed on the 303(d) list as partially supporting their designated water use, and scheduled for TMDL evaluation. Thirty-eight stream segments were rated as Excellent, Good, or Fair and assessed as supporting their designated water use.
1.2 Watershed Description
The 49 impaired monitor sites and their watersheds are located in the Ocmulgee River Basin in middle Georgia in Bibb, Bleckley, Butts, Crawford, Henry, Jasper, Jones, Lamar, Monroe, Spaulding and Twiggs Counties (see Figure 1). The 38 unimpaired monitoring sites and their watersheds are located in Bibb, Butts, Gwinnett, Henry, Jasper, Jones, Lamar, Monroe, Newton, Spaulding, and Walton Counties.
The land use characteristics of the Ocmulgee River Basin watersheds were determined using data from Georgia's Multiple Resolution Land Coverage (MRLC). This coverage is based on Landsat Thematic Mapper digital images developed in 1995. The classification is based on a modified Anderson level one and two system. Table 3 lists the land use distribution of the 87 watersheds WRD monitored in 1990, 1998, and 1999. The watersheds are grouped by: those that are not on the 303(d) list (unimpaired) and those that are on the 303(d) list (impaired). Table 4 lists the land use percentages for all the Ocmulgee River Basin watersheds monitored. The data show that the watersheds are predominately forested with approximately 74.2 percent (ranging from 12.2 to 98.8 percent) in forest use. Agriculture is the next predominate land use with
Georgia Environmental Protection Division
Atlanta, Georgia
1
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Figure 1
June 2001
Georgia Environmental Protection Division
Atlanta, Georgia
2
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Table 2. 303(d) Listed Stream Segments located in the Ocmulgee River Basin
June 2001
BASIN/STREAM
STATUS
LOCATION
MILES
Bay Creek
Not Supporting
Headwaters to Beaver Creek - Peach and Houston Counties
9
Big Sandy Creek
Partially Supporting Upstream Indian Springs - Butts County
8
Browns Branch
Partially Supporting Headwaters (Locust Grove) to Wolf Creek - Henry County
5
Butlers Creek
Partially Supporting Tributary to Ocmulgee River - Jones County
5
Cabin Creek
Not Supporting
Headwaters (Griffin) to Towaliga River - Spalding County
16
Calaparchee Creek
Partially Supporting Upstream Lake Wildwood - Monroe and Bibb Counties
13
Cole Creek
Partially Supporting Tributary to Tobesofkee Creek - Lamar and Monroe Counties
6
Eightmile Creek
Partially Supporting Tributary to Towaliga River - Monroe County
5
Gladesville Creek
Partially Supporting Headwaters to Little Falling Creek - Jasper County
9
Hansford Branch
Partially Supporting Monroe County
2
Harmon Pye Branch
Partially Supporting Tributary to Wise Creek - Jasper County
1
Hartley Branch
Partially Supporting Tributary to Deep Creek - Crawford County
1
Herds Creek
Partially Supporting Downstream from GA Hwy 212 to Ocmulgee River - Jasper County
6
Little Chehaw Creek
Partially Supporting Headwaters to Chehaw Creek - Jones County
3
Little Deer Creek
Partially Supporting Headwaters to Deer Creek - Monroe County
6
Little Deer Creek Tributary Partially Supporting Headwaters to Little Deer Creek - Monroe County
1
Little Shellstone Creek Partially Supporting Bleckley County
4
Long Branch
Partially Supporting Tributary to Ocmulgee River - Jasper County
3
Malholms Creek
Partially Supporting Headwaters (Jenkinsburg) to Tussahaw Creek - Butts County
6
Mill Dam Creek
Partially Supporting Monroe County
4
Phinazee Creek
Partially Supporting Lamar and Monroe Counties
6
Red Creek
Partially Supporting Tributary to Rocky Creek - Monroe County
3
Rock Creek
Partially Supporting Upstream from Lite-N-Tie Road - Jones County
1
Rocky Creek - Jasper
Partially Supporting Jasper County
5
Rocky Creek - Butts
Partially Supporting Upstream from Big Sandy Creek - Monroe and Butts Counties
6
Rocky Creek - Bibb
Partially Supporting Upstream from Lake Wildwood - Monroe and Bibb Counties
7
Rocky Creek - Monroe Partially Supporting Downstream from English Road (CR 152) to Towaliga River - Monroe County
4
Rum Creek
Partially Supporting Rum and Town Creeks, upstream from Lake Juliette - Monroe County
6
Sand Branch
Partially Supporting Tributary to Towaliga River - Monroe County
2
Scoggins Creek
Partially Supporting Tributary to Ocmulgee River - Jones County
2
Shellstone Creek
Partially Supporting US Hwy 23 to Ocmulgee River - Bleckley and Twiggs Counties
8
Third Branch
Partially Supporting Tributary to Ocmulgee River - Jones County
3
Tobesofkee Creek
Partially Supporting Barnesville to Cole Creek - Lamar and Monroe Counties
8
Tobler Creek
Partially Supporting Tributary to Ocmulgee River - Monroe County
6
Tributary to Tobesofkee Ck Partially Supporting Barnesville - Lamar County
2
Town Branch
Not Supporting
Downstream from Jackson South WPCP to Aboothlacoosta Creek - Butts County 3
Walnut Creek
Partially Supporting Downstream Hwy 42 - Crawford County
4
Walnut Creek
Not Supporting
Headwaters to Ocmulgee River - Jones and Bibb Counties
20
White Creek
Partially Supporting Lamar and Monroe Counties
4
Wise Creek
Not Supporting
Headwaters to Kinnard Creek - Jasper County
6
Wood Creek
Partially Supporting Headwaters to downstream from GA Hwy 83 - Lamar and Monroe Counties
3
Source: GAEPD, 1998-1999. Water Quality in Georgia, 1998-1999, Georgia Department of Natural Resource,
Environmental Protection Division.
Georgia Environmental Protection Division
Atlanta, Georgia
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
approximately 12.1 percent pasture land (ranging from 0 73.4 percent) and approximately 5.0 percent cropland (ranging from 0 to 21.7 percent).
The soil characteristics of the Ocmulgee River Basin watersheds were determined using data from the State Soil Geographic (STATSGO) coverage. This coverage provides major soil type classifications. Table 5 lists the soil type distribution of the monitored watersheds.
1.3 Water Quality Standard
The water use classification for the impaired watersheds in the Ocmulgee River Basin is Fishing. The criterion violated is listed as Biota Impacted, which indicates studies have showed a significant modification of the fish community. The potential cause(s) listed include urban runoff, nonpoint sources, unknown sources, and industrial facilities. The narrative standard is to maintain the biological integrity of the waters of the State, as stated in Georgia's Rules and Regulations for Water Quality Control Chapter 391-3-6-.03(2)(a):
The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
Georgia Environmental Protection Division
Atlanta, Georgia
4
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Table 3. Land Use Distribution (Unimpaired) Area (acres)
June 2001
Open Water Low Intensity Residential High Intensity Residential High Intensity Commercial Industrial Transportation Bare Rock Sand and Clay Quarries Strip Mines Gravel Pits Transitional Deciduous Forest Evergreen Forest Mixed Forest Pasture/Hay Row Crops Other Grasses Urban Recreational) Woody Wetland Emergent Herbaceous Wetlands Total
Name
Alcovy River Beaverdam Creek Big Sandy Creek Buck Creek Chambliss Creek Deer Creek U/S Deer Creek D/S Douglas Creek Falling Creek Herds Creek at CR 198 Herds Creek at GA 212 Kinnard Creek Lee Creek Little Buck Creek Little Deer Creek Little Falling Creek Long Branch Panther Creek Peeksville Creek Prairie Creek Rock Creek Rocky Creek - Bibb Rocky Creek - Monroe Sabbath Creek Swan Creek - U/S Swan Creek -D/S Tobesofkee Creek lower Towaliga River Town Branch U/S Jackson Troublesome Creek Tussahaw Creek Trib Tussahaw Creek upper Tussahaw Creek lower Yellow Creek Yellow Water Creek Trib Yellow Water Creek U/S Yellow Water Creek D/S Yellow Water Creek lower
705.2 1648.3 35.4 207.7
554.2 171.9 29.8
13.1 50.5 35.1 0.7 36.3 0.7
4.4 2.2 126.8 30.0
2.0 2.2 2.2
418.5
3.6 35.4
1423.1 129.7 499.0 47.6 84.7 43.6 49.4 4.2 6.7 0.7 0.7 0.4
18.0 7.8
53.6 9.3 7.3 9.1 6.2
13.8 260.9 111.4
6.7 2.4 3.6 206.6 472.3 3.1 85.6 6.0 66.72 112.3 47.8 0.2 21.3 21.3 107.4
1.6 0.0 0.0 0.4 12.0 0.2 1.6 10.9 658.7 10.7 978.9 0.2 0.2 529.9 439.7 159.7 203.9 1.8 41.59 92.3
29.1 195.3 197.0 405.9
0.0 0.0
141.7 2.9
180.4
100.3 41.4 30.2 11.6
6.23 24.5
4.2 24.2 24.2 80.9
7.6 6.9 0.0 2.0 2.7 3.3 6.0 5.3 252.2 121.4 83.6 1.6 2.2 189.9 450.3 66.9 72.5 1.8 78.06 50.9 10.2 3.6 31.1 31.6 239.3
2.2 165.9 748.3 41111.3 17763.8 22035.0 16680.6 4739.5 964.7 5921.7 197.5 114525.7
21.6
164.8 2768.3 1048.3 927.6 31.6 311.3 69.4 16.5
3.8 5735.8
28921.6 18714.3 19713.0 13129.1 4687.5
3590.7 137.2 89946.6
10.0 5852.1 2937.1 4656.1 4504.9 1192.0 26.9 1119.5
6.7 20558.1
1179.8 819.7 426.8 642.9 207.3 83.4
3543.5
1434.8 860.9 520.6 1158.6 258.9
0.9
4314.1
1522.7 955.6 561.3 1201.8 262.6
0.9
4591.2
563.5 259.1 272.2 115.0 60.7
2.9
1284.3
13.8 47.1 413.0 16736.6 20678.0 6454.6 633.6 387.4
8.5 365.2
5.6 45906.7
282.0 84.1 79.2 73.4 14.2
535.5
3.8 981.8 1032.5 517.5 452.8 82.7
2.0
3076.1
0.4
2.9 1997.0 1287.2 823.3 580.4 268.0
6.2
0.4 4968.6
580.4 571.3 557.7 275.8 12.2 12.2
2009.7
781.7 455.7 505.9 717.9 225.9
239.7
3.1 2957.1
0.7 125.9 10.7 1411.7 1185.8 488.4 162.3 257.7
0.7 127.9
1.6 3787.9
2.7
1.8 66.0 4753.5 4381.0 2315.7 182.6 102.1
0.0 270.6
1.8 12131.4
0.9 335.8 242.4 146.8 104.1 24.0
2.2
868.0
364.5 140.1 176.8 225.5 43.6
8.5
7.3
988.3
728.8 328.0 375.6 332.2 123.0
30.7
1931.0
431.4 431.9 435.7 338.9 81.6
6.2 19.3
1758.9
12.7 205.9 269.3 938.9 1017.6 299.1 27.6 82.3
12.0
1.1 2896.6
59.4
571.5 4855.8 2631.1 2695.3 526.8 1158.6 109.4 221.5 10.7 14153.6
6.7 342.5 10830.0 5391.1 6552.6 3733.0 997.0 23.8 288.4
28411.5
27.1
127.4 363.2 444.6 401.6 29.8 106.3 15.1 10.5
1.3 2776.5
281.8 71.2 234.6 443.0 64.5
27.8
1127.1
772.1 622.9 692.1 575.1 78.7
241.1
2988.0
0.0 254.4 290.4 10599.4 8022.4 6929.1 5165.8 1461.7 201.3 426.5
0.2 34378.1
0.4 70.3 265.3 17575.0 12830.6 15683.0 11584.1 4245.8 278.9 2501.0 83.6 66521.7
437.9 274.2 286.7
9.8 18.9 57.6
2.9
1347.9
1910.5 2416.0 2537.4 983.8 319.3 90.7 55.2
0.2 8686.9
359.2 207.9 332.0 480.4 227.1
0.7
4.0
1620.8
0.00 47.81 0.00 3004.45 1880.50 2463.38 2820.76 1188.88 42.48 207.49 2.67 11851.00
0.4
422.5 8074.9 6895.3 5904.2 4659.5 2082.9 92.7 1487.8
5.3 29905.5
298.0 1927.9 1230.5 648.0 1179.8 247.5
200.6
1.1 5791.4
146.3 97.4 74.7 30.9 18.2 14.9
0.2
419.9
0.4 1435.3 811.7 1192.7 1265.6 422.8 58.3 81.2
3.3 5543.2
0.4 1442.6 813.0 1194.2 1277.4 422.8 58.3 81.2
3.3 5567.5
0.4
1.3 5797.0 2780.3 3120.5 4819.3 1620.5 104.3 410.5
3.3 19491.1
Georgia Environmental Protection Division
5
Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Table 3. Land Use Distribution (Impaired) Area (acres)
June 2001
Open Water Low Intensity Residential High Intensity Residential High Intensity Commercial Industrial Transportation Bare Rock Sand and Clay Quarries Strip Mines Gravel Pits Transitional Deciduous Forest Evergreen Forest Mixed Forest Pasture/Hay Row Crops Other Grasses Urban Recreational) Woody Wetland Emergent Herbaceous Wetlands Total
Name
Bay Creek Big Sandy Creek Browns Branch Butlers Creek Cabin Creek - upper Cabin Creek - middle Cabin Creek -lower Calaparchee Creek Cole Creek Eightmile Creek Gladesville Creek Hansford Branch Harmon Pye Branch Hartley Branch Herds Creek at CR 159 Little Chehaw Creek Little Deer Creek trib Little Deer Creek U/S Little Deer Creek D/S Little Shellstone Creek Long Branch Malholms Creek Mill Dam Creek Phinazee Creek Red Creek Rock Creek Rocky Creek - Jasper Rocky Creek - Butts Rocky Creek - Bibb Rocky Creek - Monroe Rum Creek Sand Branch Scoggins Creek Shellstone Creek Third Branch Tobesofkee Creek Trib Tobesofkee Creek U/S confluence Tobesofkee Creek D/S confluence Tobesofkee Creek middle Tobler Creek Town Branch D/S Jackson WPCP Town Branch - Rum Creek U/S Town Branch - Rum Creek D/S Walnut Creek Walnut Creek - upper Walnut Creek -lower White Creek Wise Creek Wood Creek
284.7 10.0
9.8 10.2 2.7
319.3 10.0 703.9 87.2 962.7 31.6 50.3
0.9 0.2 4.7 0.7 11.1
1.6 28.9 0.9 10.9 0.7 16.9 14.5
7.8 7.8
12.7 0.2 3.1
57.6 9.1 1.6 3.6
10.7 40.3 20.7
4.9 155.9
7.3 2.0 2.0 56.7 2.9 3.1 4.2 4.2 28.9 18.5 82.5 2.7 7.6 6.4
5.3 0.9 0.9 0.2 0.2 2.0 187.5
2.4 35.4 210.8 249.5 252.0 35.1 159.7 130.5 130.5
0.9 24.0 228.8
1.6
130.1 0.4
48.7 122.1 156.3
0.7
2.9 2.9 0.7 47.8
8.2 69.4 77.8 78.1 30.2 40.7 40.7
0.7 36.7
269.8 2.2 5.3
92.3 121.4 197.9 100.3
0.2
20.5 3.8
12.0 0.4 6.0 6.9
7.8 0.4 79.4 1.3 2.4 4.0 29.8 176.6
2.4 2.0 19.6 50.3 70.3 87.8 23.6 66.9 144.3 144.3 20.5 2.2 76.1 0.9 2.9 1.3
4.7
33.6 85.2 56.0 24.9 130.8 295.8 37.4 10.5
758.6 675.2 677.6 852.0 221.7
3.8
687.4 359.4 625.8 882.2 470.8 15.6
2.2
2.7
55.4 854.9 1771.3 283.1
5.3
2.0
152.6 100.1 183.0
4.0 18.0 57.8
339.1 367.4 518.4 76.7 44.7 155.0
0.2
1597.9 1172.6 1722.2 1144.4 304.9 280.7 11.3
7.8
96.7 975.6 319.6 306.4 210.4 334.2 26.9 15.6
281.5 97.9 192.8 235.1 72.3
0.9
288.9 116.8 95.2 70.3
9.6
2.7
27.6 1364.1 1054.1 824.6 162.6 77.6
24.9
307.6 129.7 115.2
5.1
1.6
0.4
11.1 783.5 483.2 411.6
7.6 19.8
1.3
263.5 3890.7 2297.9 970.7 480.6 159.7
30.7
52.7 3221.1 3051.6 1435.3 777.2 154.1
89.6
2.9
72.5 601.1 570.9 228.2 155.2 245.1
0.7
9.8
0.7 125.9
7.8 243.5 194.6 49.4 22.5 70.1
0.2
0.7 125.9
9.6 1395.7 1168.9 483.0 161.0 246.6
0.2 119.4
0.9 125.9 16.2 2371.1 1833.4 733.0 167.0 287.1
0.7 150.8
25.6 399.6 137.7 97.0
30.7
17.3
35.4 652.7 551.5 359.4
0.7 17.6
0.2
297.3 208.8 310.2 408.3 123.4 12.5
8.7
433.7 507.0 203.5 103.4 18.9
164.1 840.8 260.9 345.6 83.6 58.0
28.0
6.7 340.9 7058.3 3998.7 4793.6 2657.7 795.7
2.4 178.8
6.2 93.2 66.0 263.3 226.4 83.2
4.9 82.3
6.2
337.1 192.1 141.7 230.8 79.6
4.2 932.5 511.5 417.6 260.0 26.7
3.1
69.2 1392.8 864.2 868.9 127.7 253.7 62.5 127.0
0.4 1458.4 599.8 1132.2 636.7 138.5
1.3
119.4 3055.4 1552.7 1005.2 549.5 258.2 56.7
0.0
228.2 317.3 159.9
7.3
3.6
2.4 180.6 1033.4 587.3 328.5
6.9
2.2
34.9
1744.4 11459.4 4672.1 2040.2 978.1 5272.8 38.5 1309.9
26.0 678.3 565.1 536.4
1.3
0.7
89.2
217.3 88.5 141.9 97.4 53.4 18.7
0.2
225.9 302.9 340.9 89.0 65.8 89.6 48.3
0.2 565.5 451.7 574.4 204.2 139.2 108.7 48.5
177.0 5777.4 2884.8 3893.3 2952.9 923.1 108.7 140.1
9.3
191.3 2257.7 2460.5 735.4 14.2 162.1
8.7
466.3 279.3 299.1 13.3 19.6 57.6
2.9
250.2 95.6 157.9 54.9 30.0 44.3
258.0 96.5 166.8 56.7 30.2 44.3
263.5 3890.7 2297.9 970.7 480.6 159.7
30.7
1.6
108.3 1914.1 2141.4 652.3 188.4 293.6
4.0
8.5
19.6
583.5 6572.9 6381.2 2296.8 1617.6 1492.7 14.7 45.1
2.9 439.4 602.0 440.3 189.3 30.5
4.0
2.7
36.7 2653.1 2043.5 1524.0 468.8 314.0
8.9
129.9 414.3 103.0 122.3 365.8 40.5
1.6 1364.8 3201.0 3069.2
0.4 2977.8 975.8
2458.7 7638.3 1.1 2476.5
881.5 586.2 0.9 3550.2 559.1 1720.2 8144.7 4.2 8801.2 0.2 1929.9 715.0 0.2 3725.0 1.8 5702.4 707.9 1617.4 1395.0 1267.2 1788.0 19973.7 0.4 841.3 984.5 2161.8 5.6 3788.8 4037.4 0.0 7029.7 716.3 0.9 2147.1 6.2 27717.2 1906.3 680.5 1494.9 2492.1 17331.9 1.6 5902.4 1398.1 952.7 972.3 8144.7 0.2 5356.9 3.1 19451.3 1711.9 0.4 7064.1 1183.5
Georgia Environmental Protection Division
6
Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Table 4. Land Use Percentage (Unimpaired)
June 2001
Open Water Low Intensity Residential High Intensity Residential High Intensity Commercial Industrial Transportation Bare Rock Sand and Clay Quarries Strip Mines Gravel Pits Transitional Deciduous Forest Evergreen Forest Mixed Forest Pasture/Hay Row Crops Other Grasses Urban Recreational) Woody Wetland Emergent Herbaceous Wetlands
Name
Alcovy River Beaverdam Creek Big Sandy Creek Buck Creek Chambliss Creek Deer Creek U/S Deer Creek D/S Douglas Creek Falling Creek Herds Creek at CR 198 Herds Creek at GA 212 Kinnard Creek Lee Creek Little Buck Creek Little Deer Creek Little Falling Creek Long Branch Panther Creek Peeksville Creek Prairie Creek Rock Creek Rocky Creek - Bibb Rocky Creek - Monroe Sabbath Creek Swan Creek - U/S Swan Creek -D/S Tobesofkee Creek lower Towaliga River Town Branch U/S Jackson Troublesome Creek Tussahaw Creek Trib Tussahaw Creek upper Tussahaw Creek lower Yellow Creek Yellow Water Creek Trib Yellow Water Creek U/S Yellow Water Creek D/S Yellow Water Creek lower
0.62% 0.62% 0.62% 0.84% 0.37% 0.81% 0.79% 0.35% 0.28% 0.37% 0.07% 0.04%
1.44% 3.62%
0.14% 1.42% 0.02% 0.01% 0.17% 0.07%
0.61% 0.05% 0.21% 0.00% 0.44% 0.00% 1.08% 0.05% 0.74% 1.22% 0.47% 0.01% 0.35% 0.09% 0.48% 0.38% 1.84% 4.65% 0.39% 0.04% 0.24% 35.26% 0.22% 0.02% 0.12% 0.01% 0.60% 1.54% 0.71% 0.66% 0.23% 11.85% 0.99% 2.35% 0.37% 0.11% 0.56% 0.35% 0.38% 0.31% 0.83% 0.05% 6.94% 0.39% 3.52% 0.38% 3.54% 0.55% 2.08%
0.37%
0.02% 1.00%
0.00% 0.00%
1.00% 0.01% 6.50%
0.29% 0.06% 2.24% 0.13% 0.05% 0.08% 1.01% 0.44% 0.44% 0.42%
1.24% 2.26% 0.55% 0.23% 2.39% 1.01% 1.08% 0.33% 0.01% 0.12% 0.02% 0.01%
0.26% 0.18% 0.00% 0.23% 0.27% 0.17% 0.34% 0.18% 1.78% 0.43% 3.01% 0.14% 0.07% 0.55% 0.68% 4.97% 0.83% 0.11% 0.66% 0.17% 0.18% 0.85% 0.56% 0.57% 1.23%
0.00% 0.38%
0.03% 0.01% 0.02% 0.02%
0.44% 0.42% 0.98% 0.00% 0.00%
0.00% 0.00%
0.00%
0.14%
0.10%
3.32% 0.01%
7.11% 0.02% 0.74% 0.11% 0.40%
0.65% 2.87% 0.05%
0.90% 0.12% 0.06% 28.88% 0.28% 0.54% 0.10%
9.30% 4.04% 1.21% 4.59%
0.84% 0.40%
0.00% 1.41% 5.15% 0.01% 0.01% 0.01%
35.90% 48.26% 32.15% 28.47% 33.29% 33.26% 33.17% 43.88% 36.46% 52.66% 31.92% 40.19% 28.43% 26.43% 37.27% 39.18% 38.69% 36.88% 37.74% 24.53% 32.41% 34.31% 38.12% 13.08% 25.00% 25.84% 30.83% 26.42% 32.49% 21.99% 22.16% 25.35% 27.00% 33.29% 34.85% 25.89% 25.91% 29.74%
15.51% 18.28% 20.81% 14.29% 23.13% 19.95% 20.81% 20.17% 45.04% 15.70% 33.57% 25.91% 27.75% 15.41% 31.30% 36.11% 27.93% 14.18% 16.99% 24.55% 35.13% 18.59% 18.98% 16.01%
6.31% 20.85% 23.34% 19.29% 20.34% 27.81% 12.83% 15.87% 23.06% 21.25% 23.20% 14.64% 14.60% 14.26%
19.24% 16.17% 21.92% 22.65% 12.04% 12.07% 12.23% 21.19% 14.06% 14.78% 16.82% 16.57% 13.72% 17.11% 12.89% 19.09% 16.91% 17.89% 19.45% 24.77% 10.33% 19.04% 23.06% 14.47% 20.82% 23.16% 20.16% 23.58% 21.27% 29.21% 20.49% 20.79% 19.74% 11.19% 17.80% 21.52% 21.45% 16.01%
14.56% 0.55%
14.60% 21.91% 18.14% 26.86% 26.18%
8.95% 1.38% 13.70% 14.72% 11.68% 0.61% 24.28% 4.29% 1.51% 11.99% 22.82% 17.21% 19.27% 0.95% 3.72% 13.14% 1.07% 39.31% 19.25% 15.03% 17.41% 0.73% 11.33% 29.64% 23.80% 15.58% 20.37% 7.36% 22.83% 22.94% 24.73%
4.14% 5.43% 5.21% 5.80% 5.85% 6.00% 5.72% 4.73% 0.84% 2.66% 2.69% 5.39% 0.61% 7.64% 6.80% 0.84% 2.77% 4.41% 6.37% 4.64% 2.84% 8.19% 3.51% 3.83% 5.72% 2.63% 4.25% 6.38% 1.40% 3.68% 14.01% 10.03% 6.96% 4.27% 4.34% 7.63% 7.59% 8.31%
0.84% 1.21%
0.13% 2.35% 0.02% 0.02%
0.02%
0.02% 0.00%
0.86%
0.35%
0.77% 0.08% 0.54%
0.59% 0.42% 4.27% 1.04% 0.04% 0.36% 0.31%
3.55% 1.05% 1.05% 0.54%
5.17% 0.29% 3.99% 5.45%
0.23% 0.80%
0.07% 0.13%
8.11% 3.38% 2.23% 0.26% 0.74% 1.59% 1.10% 0.41% 1.56% 1.02% 0.38% 2.47% 8.07% 1.24% 3.76% 0.21% 0.63% 0.25% 1.75% 4.97% 3.46% 0.05% 1.46% 1.46% 2.11%
0.17% 0.07% 0.15% 0.03%
0.01%
0.01% 0.11% 0.04% 0.01%
0.04% 0.08% 0.05%
0.00% 0.13% 0.00% 0.02% 0.02% 0.02% 0.06% 0.06% 0.02%
Georgia Environmental Protection Division
7
Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Table 4. Land Use Percentage (Impaired)
June 2001
Open Water Low Intensity Residential High Intensity Residential High Intensity Commercial Industrial Transportation Bare Rock Sand and Clay Quarries Strip Mines Gravel Pits Transitional Deciduous Forest Evergreen Forest Mixed Forest Pasture/Hay Row Crops Other Grasses Urban Recreational) Woody Wetland Emergent Herbaceous Wetlands
Name Bay Creek Big Sandy Creek Browns Branch Butlers Creek Cabin Creek - upper Cabin Creek - middle Cabin Creek -lower Calaparchee Creek Cole Creek Eightmile Creek Gladesville Creek Hansford Branch Harmon Pye Branch Hartley Branch Herds Creek at CR 159 Little Chehaw Creek Little Deer Creek trib Little Deer Creek U/S Little Deer Creek D/S Little Shellstone Creek Long Branch Malholms Creek Mill Dam Creek Phinazee Creek Red Creek Rock Creek Rocky Creek - Jasper Rocky Creek - Butts Rocky Creek - Bibb Rocky Creek - Monroe Rum Creek Sand Branch Scoggins Creek Shellstone Creek Third Branch Tobesofkee Creek Trib Tobesofkee Creek U/S confluence Tobesofkee Creek D/S confluence Tobesofkee Creek middle Tobler Creek Town Branch D/S Jackson WPCP Town Branch - Rum Creek U/S Town Branch - Rum Creek D/S Walnut Creek Walnut Creek - upper Walnut Creek -lower White Creek Wise Creek Wood Creek
20.86% 0.31% 0.32% 0.33% 0.09%
32.73% 0.41% 28.63% 1.14% 12.60% 1.28% 2.03% 0.10% 0.03% 0.80% 0.11% 0.31%
0.09% 0.35% 0.01% 0.12% 0.01% 0.88% 0.75%
0.21% 0.14%
0.91% 0.02% 0.17% 0.29% 1.08% 0.16% 0.16% 0.28% 1.00% 0.29%
0.38% 0.05% 0.00% 0.02% 0.01% 0.05% 2.67%
0.23% 0.56% 0.01% 0.38%
5.20% 0.13% 14.10% 0.08% 10.01% 0.33% 1.45% 0.05% 0.60% 0.22% 11.42% 0.44% 13.70% 0.43% 13.43% 0.35% 0.01% 0.34% 0.45% 0.42% 1.18% 0.16% 0.11% 0.02% 0.54%
9.53% 19.77% 0.07%
0.01% 0.17%
4.99% 4.97% 2.05%
9.46% 4.94% 2.59% 4.05%
0.04%
0.01%
0.25% 0.04% 0.62% 0.06% 0.16% 0.12%
0.16% 0.01%
0.02% 0.68%
0.56% 0.04% 0.40% 0.14% 0.11% 0.11% 0.74% 2.51%
1.21% 4.64% 3.12% 0.45% 2.16% 4.27% 4.19% 0.01% 0.19%
0.01% 0.10% 2.88% 3.36% 2.82% 0.51% 0.40% 4.79% 15.15% 14.84% 0.25% 0.04% 0.39% 0.05% 0.04% 0.11%
0.34% 0.09% 0.00% 0.31% 0.08% 0.03% 0.15% 0.09% 0.02% 0.02%
0.74%
0.13%
0.16% 0.03% 0.10% 0.04%
17.60% 3.38% 2.21% 0.03%
11.08% 0.11%
2.46% 1.86%
3.91% 0.78% 0.65% 3.24% 0.60% 3.76% 1.09% 0.26% 0.28% 3.61% 2.19% 9.18% 1.71% 7.85% 0.20% 1.83% 0.01% 1.70% 8.41% 6.29% 1.36% 0.01% 1.02% 3.24%
3.24% 2.02% 3.00% 0.17% 0.52% 10.97%
6.24% 23.70% 22.40% 28.71% 15.63% 13.79% 20.92% 39.39% 31.94% 49.28% 38.42% 55.01% 45.55% 47.77% 36.60% 31.15% 34.06% 37.47% 41.58% 56.46% 40.35% 21.31% 34.22% 47.03% 35.34% 31.30% 34.24% 43.13% 36.76% 36.12% 43.46% 31.85% 48.13% 41.34% 35.58% 31.93% 15.11% 22.69% 33.33% 38.25% 33.35% 26.26% 26.53% 47.77% 35.73% 33.79% 25.67% 37.56% 35.01%
4.11% 21.09% 11.71% 59.48% 10.26% 14.94% 15.35% 12.90% 11.10% 19.92% 29.69% 23.19% 28.09% 28.21% 34.67% 29.58% 27.22% 31.38% 32.15% 19.45% 34.10% 14.97% 40.01% 14.59% 20.02% 26.91% 19.52% 23.66% 22.81% 14.86% 22.09% 44.30% 27.35% 16.86% 29.64% 13.01% 20.26% 18.12% 16.64% 41.69% 19.98% 10.04%
9.93% 28.21% 39.97% 32.81% 35.16% 28.93%
8.70%
1.82% 21.17% 20.39%
9.51% 18.76% 21.08% 22.55% 12.37% 21.87% 16.24% 23.23% 20.60% 23.93% 11.92% 16.31% 11.82%
6.91% 12.97% 12.85% 13.70% 22.22% 22.24% 16.06% 19.33% 24.00%
9.89% 14.39% 19.32% 22.93% 28.04% 14.30% 22.32% 15.30%
7.36% 28.14% 20.85% 22.81% 23.05% 22.46% 12.46% 21.39% 16.57% 17.15% 11.92% 12.18% 11.81% 25.72% 21.57% 10.33%
9.58% 26.62% 28.74%
0.18% 0.41% 3.12% 14.98% 8.49% 26.66% 11.99% 4.58% 0.91% 0.44% 5.90% 8.83% 8.04% 3.14% 4.32% 2.93%
0.04% 29.27%
8.16% 4.68% 13.31% 0.58% 23.45% 12.03% 3.37% 15.77% 7.82% 1.02% 0.32% 3.53% 0.07% 14.31% 5.95% 8.19% 17.04% 0.24% 0.95% 5.77% 5.83% 5.90% 3.52% 8.32% 11.05% 6.64% 30.91%
21.67% 6.93%
15.34%
1.85% 1.82% 3.99% 13.50% 8.20% 1.63% 2.19% 0.28% 1.15% 1.96% 1.75% 12.70% 9.80% 6.62% 5.03% 4.34% 1.09% 8.85% 1.49% 3.25% 3.98% 9.78% 8.09% 1.23% 6.70% 3.43% 3.67% 0.50%
19.02% 0.03% 7.84% 4.40% 5.59% 5.33% 2.75% 1.40% 3.15% 3.11% 1.96% 5.48% 7.67% 1.78% 4.45% 3.42%
2.74% 0.51% 5.93% 6.30% 3.67% 1.09%
0.03% 0.01% 0.01% 0.89% 0.01%
1.65% 0.03% 0.81% 0.14% 2.75% 6.00% 4.36% 0.63% 4.12% 4.65% 4.55% 0.07% 0.08%
0.77% 0.12% 0.07% 0.07%
0.15% 0.63% 0.10% 0.70% 0.08% 0.38% 1.02% 0.51% 0.03% 3.21% 2.64% 2.45% 0.01% 0.62% 1.57% 0.90% 0.74% 0.14% 3.35% 0.00% 0.10% 4.73% 4.68% 0.03% 3.23% 1.95% 0.81% 0.15% 0.21%
0.38% 0.16% 0.23% 0.23% 0.13%
0.11% 0.01% 0.04% 0.03% 0.05% 0.01% 0.01% 0.03%
0.05% 0.15% 0.00% 0.04% 0.02%
0.03%
0.00% 0.02% 0.01%
Georgia Environmental Protection Division
8
Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Table 5. Soil Type Distribution (Unimpaired)
June 2001
Drainage Area
NAME
upstream from the monitoring
GA101 GA056
K-Factor
point (sq mile)
0.25 0.15
Alcovy River
180.20
Beaverdam Creek
9.22
Big Sandy Creek
54.78
Buck Creek
32.35
Chambliss Creek
5.84
Deer Creek U/S
7.31
Deer Creek D/S
7.79
Douglas Creek
2.21
Falling Creek
72.35
Herds Creek at CR 198
4.97
Herds Creek at GA 212
5.85
Kinnard Creek
7.93
Lee Creek
3.23
Little Buck Creek
4.68
Little Deer Creek
6.17
Little Falling Creek
18.94
Long Branch
1.40
Panther Creek
1.77
Peeksville Creek
3.20
Prairie Creek
2.91
Rock Creek
4.72
Rocky Creek - Bibb
22.72 385.0
Rocky Creek - Monroe
26.02
Sabbath Creek
4.47
Swan Creek - U/S
6.69
Swan Creek -D/S
1.83 46.3
Tobesofkee Creek lower
4.86
Towaliga River
4.86
Town Branch U/S Jackson WPCP
54.91
Troublesome Creek
105.42
Tussahaw Creek Trib
2.24
Tussahaw Creek upper
13.91
Tussahaw Creek lower
2.60
Yellow Creek
19.10
Yellow Water Creek Trib
61.16
Yellow Water Creek U/S
9.34
Yellow Water Creek D/S
0.71
Yellow Water Creek lower
9.12
GA051 0.12
Soil Types (acres) GA050 GA046 GA041 GA040 GA039 GA038 GA036 GA035 GA032
0.15 0.16 0.17 0.14 0.13 0.15 0.26 0.24 40817.6 2541.2
179.7 898.7 572.4 76.7
GA031 GA030 GA026 GA025
0.24 31.6
1641.0
1361.9 76.3
612.0 1641.0
784.1 957.6
70.9
0.27 0.25 31211.8
1425.1 4218.0 2982.4 52.5 1570.9 1577.8 324.5
2193.8 28117.5 261.5
1846.9 3571.3
972.5
79.8 1423.1 5988.7
922.9 52.7
53.6 12650.9
2760.5 525.7
510.2 510.2 11871.0 27376.3
3707.6 306.0
4257.2 17638.2
2480.3
0.27 40995.9
4390.8 29916.4 17750.3
3571.1 2876.6 3176.8
996.7 14694.0
301.1 1321.0 1448.4 1092.4 3011.3 3850.4 4434.0
1089.9 1105.5 1774.0
505.9 15981.2 10309.4
2718.0 670.5 670.5
23277.0 40059.0
1427.1 5279.7 1399.5 6211.9 21444.3 3505.5
411.6 5769.4 5818.8 13184.2
Georgia Environmental Protection Division
9
Atlanta, Georgia
Total Maximum Daily Load Evaluation
Ocmulgee River Basin (Biota Impacted)
Table 5. Soil Type Distribution (Impaired)
Drainage Area
Soil Types (acres)
NAME
upstream from GA101 GA056 GA051 GA050 GA046 GA041 GA040 GA039 GA038 GA036
the monitoring
K-Factor
point
(sq mile)
0.25 0.15 0.12 0.15 0.16 0.17 0.14 0.13 0.15 0.26
Bay Creek
2.30
1474.4
Big Sandy Creek
5.11
Browns Branch
5.00
Butlers Creek
4.62
Cabin Creek - upper
1.63
Cabin Creek - middle
4.18
Cabin Creek -lower
12.53
Calaparchee Creek
4.14
Cole Creek
1.51
Eightmile Creek
1.01
Gladesville Creek
5.53
Hansford Branch
0.97
Harmon Pye Branch
2.78
Hartley Branch
4.29
Herds Creek at CR 159
14.00
Little Chehaw Creek
3.07
Little Deer Creek Trib
1.20
Little Deer Creek U/S
6.07
Little Deer Creek D/S
9.22
Little Shellstone Creek
1.22
93.6
687.4
Long Branch
2.62
Malholms Creek
2.33
Mill Dam Creek
2.12
Phinazee Creek
2.87
Red Creek
12.39
Rock Creek
1.36
383.0 412.3
Rocky Creek - Jasper
1.60
Rocky Creek - Butts
3.44
Rocky Creek - Bibb
6.23
Rocky Creek - Monroe
6.60
Rum Creek
11.36
Sand Branch
1.14
Scoggins Creek
3.51 326.0
Shellstone Creek
42.82
12832.4
7990.8 7361.7
Third Branch
3.17
Tobesofkee Creek Trib
1.13
Tobesofkee Creek U/S confluence
2.42
Tobesofkee Creek D/S confluence
4.13
Tobesofkee Creek middle
27.72
Tobler Creek
9.34
Town Branch D/S Jackson WPCP
2.32
Town Branch - Rum Creek U/S
1.62
Town Branch - Rum Creek D/S
1.65
Walnut Creek
12.99
GA035 0.24
GA032
June 2001
GA031 GA030 GA026
0.24 0.27 0.25
1073.5 1639.0
426.3 942.7 2056.0
244.4
583.8 5253.7
514.6 2285.5
330.9 13.3
1977.7 11.8
727.4
5748.5
48.0 1092.6
2.4 1063.0
571.5 424.3 835.3 8595.9
209.7 556.4
461.7 209.9 1690.6 525.7 2088.0 201.0
1849.4 62.0
6328.0 3154.3
2.0 2.0 5253.7 2285.5
GA025
0.27
3286.7 2129.6 1397.3
596.2 1699.7 5885.7 2561.2
596.4 598.9 960.3 587.3 468.1 737.0 3268.4 1979.5 742.8 3806.6 4810.5
899.3 898.2 900.0 1041.4 11780.3
71.4 577.8 1989.9 2467.2 3145.7 5612.4 542.2 251.3
0.0 56.9 704.1 1556.3 2610.8 11350.6 2884.1 1505.6 1002.5 1034.1 737.0
Georgia Environmental Protection Division
10
Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Walnut Creek - upper Walnut Creek -lower White Creek Wise Creek Wood Creek
8.53 31.01
2.81 11.31
1.96
1804.9 1744.8
June 2001
3465.0 7795.3
106.1 3598.2
556.6
2075.8 10327.2
1699.9 1885.2
713.2
Georgia Environmental Protection Division
11
Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
2.0 WATER QUALITY ASSESSMENT
2.1 Fish Sampling
In 1990, the Department of Natural Resources (DNR) Wildlife Resources Division (WRD) conducted studies of fish communities in the Piedmont ecoregion. Biological monitoring is a method used to evaluate the health of a biological system in order to assess degradation from various sources. It is based on direct observations of aquatic communities. The results of these studies were the basis for the original listing of Biota Impacted stream segments on Georgia's 1996 303(d) list. In 1998 and 1999, WRD re-evaluated the stream segments in the Piedmont ecoregion. Four of the segments (Bay Creek, Hartley Branch, Little Shellstone Creek, and Shellstone Creek) are in the Southeastern Plains ecoregion. Biological monitoring protocols have not been developed for this area, so these segments have not been scored.
The work performed by the WRD looked at patterns of fish communities within the various ecoregions. An ecoregion is a region of relative homogeneity in ecological systems or in relationships between organisms and their environment. Seven major ecoregions have been identified in Georgia based upon the soil types, potential natural vegetation, land surface form, and predominant land uses. These include the Blue Ridge Mountains, Ridge and Valley, Southwestern Appalachians, Piedmont, Middle Atlantic Coastal Plain, Southeastern Plains, and Southern Coastal Plain.
Reference sites within the Piedmont ecoregion were established. These sites represented the least impacted sites that exist given the prevalent land use within the ecoregion. Eighty-seven sites were sampled within the Ocmulgee River Basin. These sites had to be accessible, wadeable, and representative of the stream under investigation. The length of the fish sampling site was thirty-five times the mean stream width up to 500 meters. This sampling length was found to be long enough to include the major habitat types present. Electrofishing and seining techniques were used for sampling the fish population (GAWRD, 2000).
Two indices of fish community health were used to assess the biotic integrity of the aquatic systems: the modified Index of Well-Being (IWB) and the Index of Biotic Integrity (IBI). The IWB and IBI scores were classified as Excellent, Good, Fair, Poor, or Very Poor. Segments with fish populations rated as Poor or Very Poor were listed as Biota Impacted.
The modified IWB measures the health of the aquatic community based on the density and diversity or structural attributes of the fish community. The IWB is calculated based on four parameters: the relative density of fish, the relative biomass of fish, the Shannon-Wiener Index of Diversity based on number, and the Shannon-Wiener Index of Diversity based on biomass.
The IBI assesses the biotic integrity of aquatic communities based on the functional and compositional attributes of the fish community. The IBI consists of twelve measurements or metrics, which assess three facets of the fish population: species richness and composition, trophic composition and dynamics, and fish abundance and condition. Each metric is scored by comparing its value to the value of the regional reference site. Factors that affect the structure and function of a fish community include stream location and size. Thus, the metrics were developed for regional drainage basins, e.g. the Atlantic Slope Drainage Basin, which includes the Ocmulgee, Ocmulgee, Ogeechee, and Savannah River Basins. To account for the fact that streams with larger drainage basins normally have greater species richness, Maximum Species Richness plots were developed for the species richness metric (GAWRD, 2000).
Georgia Environmental Protection Division
Atlanta, Georgia
12
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
To supplement the findings of the fish community data, habitat assessments were performed at each sampling site. Habitat scores evaluate the physical surroundings of a stream as they affect and influence the quality of the water resource and its resident aquatic community. These data may also help clarify the results of the biotic indices. The habitat assessment used was developed by personnel with the Water Protection Branch (WPB) of the Georgia Environmental Protection Division and is a modification of the EPA Rapid Bioassessment Protocol III (GAWPB, 2000). It incorporates different assessment parameters for riffle/run prevalent streams. The habitat assessment evaluates the stream's physical parameters and is broken into three levels. Level one describes in-stream characteristics that directly affect biological communities (instream cover, epifaunal substrate, embeddedness, and riffle frequency). Level two describes the channel morphology (channel alteration, sediment deposition and channel flow status). Level three describes the riparian zone surrounding the stream, which indirectly affects the type of habitat and food resources available in the stream (bank vegetation, bank stability, and riparian zone width). The total habitat scores obtained for each sampling station are compared to a sitespecific control or regional reference site. The ratio between the station of interest and the reference site provides a percent comparability that can be used to classify the stream.
Table 6 summaries WRD's study scores. The IBI, IWB, and Habitat Assessment scores are listed and the watersheds are grouped by those that were not 303(d) listed and those that were. In addition, the table includes the drainage areas upstream of the monitoring points, the county in which the monitoring points are located, and the pollutant source (nonpoint source NPS, or point source PS) or stream type (reference REF). Table 7 provides the detailed habitat assessment scores.
During the fish community studies, physical characteristics of the stream were measured at the monitoring sites. These characteristics included the number of pools, depth of the deepest pool, number of riffles, average stream depth, and average stream width. In addition, stream water quality measurements were taken at the time of the fish sampling. The parameters measured included water temperature, dissolved oxygen, conductivity, pH, turbidity, total hardness and alkalinity. Table 8 provides a summary of these field measurements.
2.2 Macroinvertebrate Sampling
In February 1999, the Department of Natural Resources (DNR) Environmental Protection Division (EPD) collected water quality samples at a number of locations monitored by WRD including all the 303(d) listed waters. Samples were analyzed to provide data to assess for the presence or absence of chemical pollution. The following analyses were conducted on each sample: dissolved oxygen (DO), temperature, conductivity, pH, turbidity, 5-day biochemical oxygen demand (BOD5), nitrate-nitrite, ammonia, total phosphorus, total alkalinity, total suspended solids (TSS), total organic carbon (TOC), metals, semi-volatile organics, pesticides, and PCBs. The results are summarized in Table 9. The watersheds are grouped by those that were not 303(d) listed and those that were, including those located in the Southeastern Plains ecoregion.
Georgia Environmental Protection Division
Atlanta, Georgia
13
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Name Alcovy River Beaverdam Creek Big Sandy Creek Buck Creek Chambliss Creek Deer Creek U/S Deer Creek D/S Douglas Creek Falling Creek Herds Creek at GA 212 Herds Creek at CR 198 Kinnard Creek Lee Creek Little Buck Creek Little Deer Creek Little Falling Creek Long Branch Panther Creek Peeksville Creek Prairie Creek Rock Creek Rocky Creek - Bibb Rocky Creek - Monroe Sabbath Creek Swan Creek U/S Swan Creek U/S Swan Creek D/S Swan Creek D/S Tobesofkee Creek lower Towaliga River Town Branch U/S Jackson WPCP Troublesome Creek Tussahaw Creek Trib Tussahaw Creek upper Tussahaw Creek lower Yellow Creek Yellow Water Creek Trib D/S Yellow Water Creek U/S Yellow Water Creek D/S Yellow Water Creek
June 2001
Table 6. 1998-1999 WRD's Fish Community Study Scores (Unimpaired)
Drainage Area (sq mile)
180.20 9.22
54.78 32.35
5.84 7.31 7.79 2.21 72.35 4.97 5.85 7.93 3.23 4.68 6.17 18.94 1.40 1.77 3.20 2.91 4.72 22.72 26.02 4.47 6.69 1.83 4.86 4.86 54.91 105.42 2.24 13.91 2.60 19.10 61.16 9.34 0.71 9.12 9.17 20.71
County Source/Type
Newton
REF
Bibb
NPS
Butts/Monroe
PS
Lamar
NPS
Monroe
NPS
Monroe
NPS
Monroe
NPS
Butts
NPS
Jones
PS
Jasper
NPS
Jasper
NPS
Jasper
NPS
Monroe
NPS
Lamar
NPS
Monroe
PS
Jones
NPS
Butts
NPS
Butts
NPS
Henry
NRCS
Lamar
NPS
Jones
NPS
Bibb
PS
Monroe
NPS
Bibb
NPS
Lamar
REF
Lamar
REF
Lamar
REF
Lamar
REF
Monroe
PS
Butts
PS
Butts
PS
Spalding
PS
Henry
NRCS
Henry
NRCS
Butts NPS/NRCS
Monroe
NPS
Butts
PS
Butts
PS
Butts
PS
Butts
PS
IBI Score
42 34 42 44 42 50 34 36 44 40 40 36 38 44 36 36 46 34 34 34 34 38 36 42 38 44 54 54 44 36 38 48 36 42 42 44 38 44 38 36
IBI
IWB
Category IWB Score Category Habitat Total
Fair
8.7
Good
78
Fair
7.2
Fair
106.9
Fair
75.7
Good
8.8
Good
82
Fair
6.4
Fair
57.3
Good
8.1
Good
66.3
Fair
5.5
Poor
84.7
Fair
7.7
Good
91.7
Good
7.5
Fair
51.2
Fair
6.6
Fair
47
Fair
5.1
Poor
112.7
Fair
6.2
Fair
70
Fair
6.8
Fair
74.7
Good
6.7
Fair
74
Fair
7.4
Good
88
Fair
7.4
Fair
56.3
Good
7.1
Fair
86.3
Fair
6.9
Fair
111.3
Fair
6.4
Fair
57.5
Fair
7.1
Fair
59.7
Fair
6.4
Fair
56.7
Fair
7.1
Fair
95.5
Fair
8
Fair
71.3
Fair
8
Good
118.8
Fair
6.6
Fair
103.2
Good
7.2
Fair
152
Excellent
7.3 Excellent
70.2
Excellent
8.3 Excellent
92
Good
8.2
Fair
76.9
Fair
7.6
Fair
68.5
Fair
6.6
Fair
94
Good
7.1
Fair
53.2
Fair
7.1
Fair
81.1
Fair
78.2
Fair
8.5
Fair
66.9
Good
7.1
Fair
59
Fair
6.8
Fair
64.7
Good
8.2 Excellent
57.2
Fair
7.5
Good
51.1
Fair
7.8
Fair
85.3
Georgia Environmental Protection Division
14
Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Table 6. 1998-1999 WRD's Fish Community Study Scores (Impaired)
Name
Big Sandy Creek Brown Branch Butlers Creek Cabin Creek upper Cabin Creek middle Cabin Creek lower Calaparchee Creek Cole Creek Eightmile Creek Gladesville Creek Hansford Branch Harmon Pye Branch Herds Creek at CR 159 Little Chehaw Creek Little Deer Creek Tributary Little Deer Creek U/S Little Deer Creek D/S Long Branch Malholms Creek Mill Dam Creek Phinazee Creek Red Creek Rock Creek Rocky Creek - Jasper Rocky Creek - Butts Rocky Creek -Bibb Rocky Creek - Monroe Rum Creek Sand Branch Scoggins Creek Third Branch Tobesofkee Creek Trib. Tobesofkee Creek U/S confluence Tobesofkee Creek D/S confluence Tobesofkee Creek - middle Tobler Creek Town Branch D/S Jackson WPCP Town Branch - Rum Creek U/S Town Branch - Rum Creek D/S Walnut Creek Walnut Creek - upper Walnut Creek - lower White Creek Wise Creek Wood Creek
Drainage Area (sq mile)
5.11 5.00 4.62 1.63 4.18 12.53 4.14 1.51 1.01 5.53 0.97 2.78 14.00 3.07 1.20 6.07 9.22 2.62 2.33 2.12 2.87 12.39 1.36 1.60 3.44 6.23 6.60 11.36 1.14 3.51 3.17 1.13 2.42 4.13 27.72 9.34 2.32 1.62 1.65 12.99 8.53 31.01 2.81 11.31 1.96
County Source/Type
Butts
NPS
Henry
NRCS
Jones
NPS
Spalding
PS
Spalding
PS
Spalding
PS
Monroe
NPS
Lamar
NPS
Monroe
NPS
Jasper
NPS
Monroe
NPS
Jasper
NPS
Jasper
NPS
Jones
PS
Monroe
PS
Monroe
PS
Monroe
PS
Jasper
NPS
Butts
NRCS
Monroe
NPS
Monroe
NPS
Monroe
NPS
Jones
NPS
Jasper
NPS
Butts
NPS
Bibb
NPS
Monroe
NPS
Monroe
PS
Monroe
PS
Jones
NPS
Jones
NPS
Lamar
PS
Lamar
PS
Lamar
PS
Monroe
PS
Monroe
NPS
Butts
PS
Monroe
PS
Monroe
PS
Crawford
NPS
Jones
NPS
Jones
PS
Monroe
NPS
Jasper
NPS
Monroe
REF
IBI Score
24 36 22 12 16 24 20 28 30 22 22 32 32 22 30 30 28 30 26 24 26 30 34 32 26 28 20 32 30 20 32 16 28 30 34 22 24 18 22 30 24 32 28 34 28
IBI
IWB
Category IWB Score Category Habitat Total
Very Poor
4.9 Very Poor
52.3
Fair
3.8 Very Poor
101.7
Very Poor
4.7 Very Poor
64.7
Very Poor
4.2 Very Poor
47.4
Very Poor
4.4 Very Poor
51.5
Very Poor
6.5
Poor
62.4
Very Poor
4.7 Very Poor
38.2
Poor
5.4
Poor
64.4
Poor
5.7
Poor
92.6
Very Poor
45.3
Very Poor
5
Poor
98.4
Poor
5.4
Poor
57.6
Poor
6.6
Poor
86.3
Very Poor
5.4
Poor
52.8
Poor
5.2
Poor
96.4
Poor
5.9
Fair
62.7
Poor
6.2
Fair
53.4
Poor
6.3
Fair
92.7
Poor
4.9 Very Poor
72.6
Very Poor
6.1
Fair
108.8
Poor
4.9 Very Poor
107.5
Poor
5.7 Very Poor
44.9
Fair
5.6
Poor
79.6
Poor
5.5
Poor
67.6
Poor
4.5 Very Poor
64.4
Poor
5.5
Poor
71.9
Very Poor
4.8 Very Poor
63.6
Poor
6.6
Poor
65.6
Poor
6.5
Fair
128.6
Very Poor
41.6
Poor
6
Fair
39.3
Very Poor
2.9 Very Poor
75.7
Poor
6.1
Fair
61.2
Poor
6.4
Fair
80.1
Fair
6.8
Poor
53.5
Very Poor
4.8 Very Poor
39.8
Very Poor
4.8 Very Poor
60.5
Very Poor
5.4
Poor
60.2
Very Poor
4.1 Very Poor
108.3
Poor
5.3 Very Poor
61
Very Poor
4.6 Very Poor
48.3
Poor
6.7
Poor
55.4
Poor
6.1
Fair
65.4
Fair
6.1 Very Poor
58
Poor
6.5
Fair
121.9
Georgia Environmental Protection Division
15
Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Georgia Environmental Protection Division
16
Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Table 7. 1998-1999 WRD's Habitat Assessment Scores (Unimpaired)
Name
Alcovy River Beaverdam Creek Big Sandy Creek Buck Creek Chambliss Creek Deer Creek U/S Deer Creek D/S Douglas Creek Falling Creek Herds Creek at GA 212 Herds Creek at CR 198 Kinnard Creek Lee Creek Little Buck Creek Little Deer Creek Little Falling Creek Long Branch Panther Creek Peeksville Creek Prairie Creek Rock Creek Rocky Creek - Bibb Rocky Creek - Monroe Sabbath Creek Swan Creek U/S Swan Creek U/S Swan Creek D/S Swan Creek D/S Tobesofkee Creek lower Towaliga River Town Branch U/S Jackson WPCP Troublesome Creek Tussahaw Creek Trib Tussahaw Creek upper Tussahaw Creek lower Yellow Creek Yellow Water Creek Trib D/S Yellow Water Creek U/S Yellow Water Creek D/S Yellow Water Creek
Instream EpifaunalEmbedde Channel Sediment Riffle
Cover Substrate dness AlterationDepositio Frequenc
n
y
10.9
2.7
1
16.7
2.6
0
8.5
13.5
8.4
13.1
6.4
12.5
9.7
3.7
2.7
7
6.7
1.7
7.7
2.5
2.3
16.7
4.4
0
6.3
2
2.7
5.7
3.3
0.7
6.3
5
2.7
4.3
2.3
2
12.7
15.3
8.7
8.7
11.3
15
8.7
8.7
5.3
11.3
10
6
3.3
2.3
1.3
13
0.7
0
7.3
15.3
12.3
5.7
11.3
16.7
5
13
5
11.3
6.7
11.7
4.3
3.3
1
5.7
1.7
0.3
5.3
4.3
3
6.7
3.3
0.7
5.3
3.3
4.3
7
2
1.3
4.4
7.6
1.7
11
2
16
8
7.3
4
4.7
2.3
9.3
8
2.3
2.3
5.3
3
0
7.7
10
6
9.7
4
4.7
10.3
10.3
7
10
9.3
12.3
4
3.77
2.1
17.1
0.77
0
11
1.7
3
4.3
5
0
6.3
9.3
3.3
5
2.3
12.3
10.3
7.7
3.2
14.7
4.9
16
5.5
7.8
3.2
14.8
2.7
0
13.6
11.1
8.1
16
7.5
15.5
5.7
7.8
7.2
16.3
6.1
14.5
14.3
17.3
13
14.3
13
15
7.8
3.3
3.7
19.3
3.7
0
11.3
9.3
3.7
11.7
6
11.3
5.8
3
3.5
16.1
2.8
0
6.4
1.4
1.1
16.2
2.5
0
9
9.3
6
7.3
5
11.3
4.9
2.5
3
13.4
2.3
0
5.1
9.4
5.3
16.7
4.4
0.7
8.4
7.5
4.8
12.7
5.7
15.5
6.9
2.4
1.2
16
2.9
0
9.7
6.3
4.3
6.7
6
3.3
5.3
7.3
3.3
5
4.3
8
5.2
2
1.3
16
5.2
0
6.8
1.9
1
17.4
2.6
0
Channel
Bank
Bank
Flow Vegetatio Vegetatio
Status n (Left) n (Right)
5.5
5.8
6.1
8.2
6.3
5.7
11.3
3.7
4
10.3
6.7
6.3
8.3
1.7
3.3
8.3
5.3
3.7
12.7
6.3
5
12.7
5.3
4.7
7.1
3
2.8
12
3.7
4
13.3
5.7
6
15
2.7
3.3
15.3
5.3
6
15
6
6
9.1
4.8
5
12.7
7.7
7
9.7
3
3.3
17
4
3.7
13.3
6.3
5.7
8.17
3.7
2.3
9.3
4
4
11.3
1.7
1.7
9.3
3.6
4.7
5.8
5.2
4.5
13.4
3.5
4
10.2
4.9
3.5
12
8.7
8.7
4.7
2.6
2.3
9.3
2.7
2.7
7.1
5.8
5.7
6.7
5.7
4.3
9
5.3
5.3
7
4.3
2
11
4.3
3.8
10.4
1.5
2.9
8
4.2
3.5
7
2.7
3.3
9
4
4.3
10.3
4
3.2
7.3
3.2
3.4
Bank Stability
(Left)
5.3 6.4 2.7 5.3 2.7
6 4.7 5.3 2.5 2.7 4.7
2 3.3 3.3 2.8 4.7 2.7 3.7 4.3 3.9
5 1.7 3.3 3.8
4 5.3 8.7 2.4 2.3 5.1 5.2
4 3.6 4.2 0.8 3.9 2.3 2.3 4.2 2.6
Bank Stability
(Right)
6.4 6.8 2.7 5.1
3 5 4 4.3 1.9 3.7 4.7 2.7 3.3 3.3 3.6 4 2.7 3.7 4.3 2.4 5 1.7 4.4 3.5 3.5 4.6 8.3 1.9 2.3 4.5 4.5 4.3 2.2 3.6 1.6 3.4 3 2.7 2 2.8
Riparian Zone (Left)
7.2 6.5 10 6.2 8.7 9.3 8.3 8.3 6.7
9 9.3
2 8 8.7 3 9.7 7 6 9 1.7 3.7 0 4.3 5.6 9.2 9 9.3 9.3 9.7 9 7.4 9 7.3 3.8 0.7 5.6 1.3 6 2.3 0.9
Riparian Zone
(Right)
7.8 4.7 10 8.8
9 6 9 1 6.7 9 9.3 3 5.3 9 3 6.7 7 6.3 9 9.1 3.7 0 9.1 8.9 9.3 8 9.3 9.3 9.7 8.6 7.1 9 0.7 8.8 5.7 8.9 3 3 1.5 1.2
Habitat Total
78 106.9
75.7 82
57.3 66.3 121.7 91.7 51.2 112.7 105.7
47 70 74.7 74 88 56.3 86.3 111.3 57.5 59.7 56.7 95.5 71.3 118.8 103.2 152 70.2 92 76.9 68.5 94 53.2 81.1 78.2 66.9 59 64.7 57.2 51.1
Georgia Environmental Protection Division
17
Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Table 7. 1998-1999 WRD's Habitat Assessment Scores (Impaired)
Name
Instream EpifaunalEmbedde Channel Sediment Riffle
Cover Substrate
dness AlterationDepositio Frequenc
n
y
Big Sandy Creek
5
2
1
5.7
2.3
0
Brown Branch Butlers Creek
6.4
12.1
8.4
14.3
8.1
17
6
9.3
1.7
5.7
2.3
7
Cabin Creek upper Cabin Creek middle
3.5
2
2.3
15
1.7
0
4.1
2.2
1.3
12.3
1.2
0
Cabin Creek lower Calaparchee Creek Cole Creek
7.3
1.2
0.2
14.3
3.9
0
3
2.3
1.3
6.3
3.3
0
5.7
4.7
4.3
5.3
3.7
2
Eightmile Creek Gladesville Creek
6.7
10.3
7.3
3
1.3
0.7
6
6.3
11.3
4
2
0.3
Hansford Branch Harmon Pye Branch
8.3
10
6.7
10.7
7
2.3
1.3
4.7
6
4.7
4
0
Herds Creek at CR 159 Little Chehaw Creek
8.3
7.7
3.3
3
5
6.3
5.3
5.7
2
16
1.3
0
Little Deer Creek Tributary Little Deer Creek U/S
5
13
6
5
6
14.3
5
2.7
1.7
5
1
0.7
Little Deer Creek D/S Long Branch Malholms Creek
1.8
2.3
2.5
12.3
1.3
0
6.3
8
9.7
7.7
6.7
9
4.7
6.1
4.7
14.7
4.7
0
Mill Dam Creek Phinazee Creek
5.7
8.3
8.7
8.7
9
9
8.7
9.7
7.3
13
6.7
13.7
Red Creek Rock Creek
2.3
1
1.3
4.3
1.3
0
4.3
11.3
6.7
6
6
11
Rocky Creek - Jasper Rocky Creek - Butts
5.7
4
4.3
11.3
2.3
0
4.7
10.3
4
5.3
2.7
9.7
Rocky Creek -Bibb Rocky Creek - Monroe
5.1
4
5
13.6
5.7
3
5.3
2.7
2.3
7.3
3.3
0
Rum Creek Sand Branch Scoggins Creek
6.3
9.3
2.3
7
4.3
7
12.7
13.7
10
6.7
11.7
14.3
1
2.3
3.3
5
0.3
0
Third Branch Tobesofkee Creek Trib.
2.3
2
1.3
4.3
2
0
5.3
8
5.7
4.3
3.3
13.7
Tobesofkee Creek U/S confluence Tobesofkee Creek D/S confluence
6.3
5.3
8
4.3
7.3
1.3
7.7
9
3.7
3.7
5
13
Tobesofkee Creek - middle Tobler Creek
4
3.3
1.9
15.7
2.2
0
1.3
0.7
1
7.3
0.3
0
Town Branch D/S Jackson WPCP Town Branch - Rum Creek U/S
3.7
2.3
2.7
3.7
1.7
0
5
4.3
2
6.7
6
0.7
Town Branch - Rum Creek D/S Walnut Creek Walnut Creek - upper
8
17.7
8.7
5.3
9
16
2.3
2.3
2
16
1.7
0
3
1
1
4.7
0.7
0
Walnut Creek - lower White Creek
4.7
2.7
1.3
6.7
2
0
4.7
3
1
6.7
1.7
2
Wise Creek Wood Creek
6.3
1.3
1.3
5.7
1
0.7
10
11
9
5
10.3
11
Georgia Environmental Protection Division
Atlanta, Georgia
Channel
Bank
Bank
Flow Vegetatio Vegetatio
Status n (Left) n (Right)
9.3
4.3
4.3
9.2
3.6
3.7
7
2
2.3
7.1
1.5
1.3
6.9
1.1
1.2
8.6
3.7
3.6
7
2.7
2.7
7.7
4
4
10
5
4.3
9.7
2.3
3.3
13
4.7
4.7
14.3
3
2.7
16.3
4.3
4
7.5
3.8
3.5
9.7
5.7
5.3
10.3
5.7
6.3
5.5
4.3
3.5
11.3
5
4.7
7.7
3.7
4.6
16.3
7
7.3
11.7
5.7
5
6.7
3.7
4.3
9.3
3.7
3.3
13
5
5
15.3
3.7
3.7
9.4
3
3.5
8.3
5.7
5.7
6.3
2
2
15.3
7.3
7.3
7
1.3
2
6
1.3
1.3
9.7
5
4
8
1.7
1.7
12.7
3
3
7.5
4.4
3.5
4.3
2.7
3
8
6
5.7
8.7
4.7
4.7
9
5.3
5.3
7.3
3.1
2.7
7.3
3.3
3.3
7.7
5.6
4.7
9.3
6
6
9.7
6
6
15
7.7
7.7
Bank Stability
(Left)
1.7 4 2
0.8 2.4 2.2 1.3
4 4 1.3 5.7 2.3 2.7 3.2 4 4.3 3.7 3.3 4.2 4.7 3.7 3 3 3.7 2.7 3.2 4 1.7 7 0.7 0.7 4 2 0.7 2.8 1.3 6 3.7 5.3 3.3 2.7 5.3 3.3 3 8.3
Bank Stability
(Right)
1.7 4.2
2 0.7 0.8 2.6 1.3 3.7
4 2 5.3 2 2.7 3.2 3 4 2.2 4 4.7 4.7 3.7 2.7 3 4.3 2.3 4.4 4 1.7 7 1.3 0.7 3.7 1.7 1.3 2.7 1.3 5.7 3.7 5.3 2.3 2.7 4.6 4 4 8.3
Riparian Zone (Left)
8.3 7.6 8.7 6.3
9 7.6
2 9 8.7 7.7 9.3 7 9 4 9.7 8.3 9 8.7 3.8 9.7 9.3 6 3 4 0 4.3 6.3 8 7.3 8.7 8.7 7.7 5.3 8.3 0.8 8.3 6 3 4.7 9 9.3 7.8 9 4 9.3
Riparian Zone
(Right)
6.7 3.1 8.7 5.2
9 7.2
5 6.3 8.7 7.7 9.3
7 9 2 9.7 7.7 5 8.3 9 9.7 9.3 8.3 9 5 0 7.7 8.7 7.7 8.3 8.7 8.7 1.3 8.3 9 4.7 8.3 9 7 8.7 9 9.3 2.3 8.7 9 9.3
Habitat Total
52.3 101.7
64.7 47.4 51.5 62.4 38.2 64.4 92.6 45.3 98.4 57.6 86.3 52.8 96.4 62.7 53.4 92.7 72.6 108.8 107.5 44.9 79.6 67.6 64.4 71.9 63.6 65.6 128.6 41.6 39.3 75.7 61.2 80.1 53.5 39.8 60.5 60.2 108.3
61 48.3 55.4 65.4
58 121.9
18
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Georgia Environmental Protection Division
19
Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Table 8. 1998-1999 WRD's Field Measurements (Unimpaired)
Name
Alcovy River Beaverdam Creek Big Sandy Creek Buck Creek Chambliss Creek Deer Creek U/S Deer Creek D/S Douglas Creek Falling Creek Herds Creek at GA 212 Herds Creek at CR 198 Kinnard Creek Lee Creek Little Buck Creek Little Deer Creek Little Falling Creek Long Branch Panther Creek Peeksville Creek Prairie Creek Rock Creek Rocky Creek - Bibb Rocky Creek - Monroe Sabbath Creek Swan Creek U/S Swan Creek U/S Swan Creek D/S Swan Creek D/S Tobesofkee Creek lower Towaliga River Town Branch U/S Jackson WPCP Troublesome Creek Tussahaw Creek Trib Tussahaw Creek upper Tussahaw Creek lower Yellow Creek Yellow Water Creek Trib D/S Yellow Water Creek U/S Yellow Water Creek D/S Yellow Water Creek
Number of Pools
16 1 9
13 6 4 5 5 1 5 2 3 0 0 2 1 7 6 3 0
14 3 7 1 8 0 5
13 17
4 15
4 1 3 8 13 10 1 3 3
Deepest Number of Pool (m) Riffles
1.15
0
0.53
3
0.95
0
1.40
1
0.68
0
0.64
3
0.95
4
0.70
1
0.55
0
0.55
6
0.40
5
0.58
1
0.00
0
0.50
0
0.70
2
0.95
0
0.65
0
0.70
0
0.60
3
0.00
0
0.99
0
0.46
2
1.00
3
0.50
2
1.30
4
0.00
5
0.46
3
0.95
1
1.20
1
0.75
0
1.05
0
0.68
3
0.70
0
1.20
3
1.40
5
1.50
0
0.59
1
0.79
3
1.50
0
1.30
0
Average Average Dissolved
Water
Stream Stream OxygenTemperatu
Depth (m)Width (m) (mg/L) re (deg C)
0.10
15.0
7.67
22.4
0.10
4.7
9.16
12.7
0.20
8.7
7.13
25.4
0.27
10.2
7.05
21.6
0.70
5.0
8.12
19.8
0.10
4.3
9.05
19.0
0.10
2.4
9.45
18.8
0.10
2.5
9.66
18.3
0.13
8.4
7.35
24.8
0.10
2.9
8.20
22.4
0.00
1.3
9.32
18.4
0.10
4.3
7.39
23.7
0.10
3.8
8.25
21.7
0.10
3.4
10.20
16.8
0.09
2.9
8.04
14.0
0.15
4.0
9.30
15.2
0.10
4.3
6.64
24.6
0.20
2.5
10.64
20.2
0.10
3.1
9.04
19.4
0.08
2.7
8.21
17.6
0.30
5.2
6.93
22.8
0.00
3.2
7.87
20.6
0.31
5.8
7.29
13.9
0.10
8.0
8.15
25.4
0.22
4.8
6.80
13.7
0.17
2.8
8.55
21.9
0.12
3.5
7.93
22.9
0.29
5.8
6.74
20.0
0.26
7.3
6.59
23.1
0.17
9.8
6.92
23.0
0.25
12.5
6.70
21.4
0.80
2.9
7.74
22.1
0.09
6.3
8.52
22.5
0.22
4.0
7.01
22.8
0.43
4.8
6.66
23.9
0.34
9.2
7.17
20.6
0.10
5.2
6.29
24.3
0.07
2.0
7.26
22.9
0.23
4.6
7.60
25.4
0.25
4.6
7.08
24.5
pHConductivit y (uS)
7.26
68.9
86.3
7.46
70.3
7.01
52.5
7.35
71.9
6.68
67.6
7.12
46.7
7.03
53.8
7.76
136.2
7.29
62.0
6.95
34.2
7.03
-
7.09
64.7
7.22
43.5
37.6
Turbidity
Total
(NTU) Hardness
(mg/L)
12.80
22.0
6.11
39.0
11.30
14.10
15.0
16.40
5.48
Alkalinity (mg/L)
35 45
20
9.62
55.0
65
5.96
14.80
5.59
15.50
16.90
28.70
16.0
20
7.18
123.8
10.80
6.65
38.2
6.94
-
36.7
-
6.88
40.3
10.70
15.0
20
6.80
47.0
12.80
-
-
5.90
311.4
7.76
89.6
5.83
37.0
50
7.52
50.7
6.50
14.0
25
186.1
3.65
83.0
70
6.87
46.8
8.53
13.0
20
38.3
6.14
6.90
42.7
8.70
12.0
25
7.21
54.7
11.30
7.49
188.1
13.10
20.0
45
6.28
57.8
13.80
22.0
35
7.31
56.0
7.14
7.11
67.3
16.30
28.0
40
6.86
35.7
16.00
8.0
5
6.84
46.3
31.40
13.0
20
49.8
15.80
13.0
20
7.11
51.5
10.70
6.99
197.9
40.30
7.02
74.3
17.60
21.0
45
6.71
130.1
20.20
27.0
45
Georgia Environmental Protection Division
20
Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Table 8. 1998-1999 WRD's Field Measurements (Impaired)
Name
Number of Pools
Big Sandy Creek
1
Brown Branch
0
Butlers Creek
2
Cabin Creek upper
2
Cabin Creek middle
6
Cabin Creek lower
7
Calaparchee Creek
0
Cole Creek
2
Eightmile Creek
5
Gladesville Creek
5
Hansford Branch
3
Harmon Pye Branch
8
Herds Creek at CR 159
9
Little Chehaw Creek
0
Little Deer Creek Tributary
3
Little Deer Creek U/S
3
Little Deer Creek D/S
0
Long Branch
5
Malholms Creek
2
Mill Dam Creek
5
Phinazee Creek
13
Red Creek
0
Rock Creek
1
Rocky Creek - Jasper
1
Rocky Creek - Butts
1
Rocky Creek -Bibb
4
Rocky Creek - Monroe
8
Rum Creek
5
Sand Branch
5
Scoggins Creek
0
Third Branch
2
Tobesofkee Creek Trib.
3
Tobesofkee Creek U/S confluence
10
Tobesofkee Creek D/S confluence
4
Tobesofkee Creek - middle
1
Tobler Creek
0
Town Branch D/S Jackson WPCP
1
Town Branch - Rum Creek U/S
12
Town Branch - Rum Creek D/S
4
Walnut Creek
0
Walnut Creek - upper
0
Walnut Creek - lower
0
White Creek
6
Wise Creek
1
Georgia Environmental Protection Division
Atlanta, Georgia
Deepest Number of Pool (m) Riffles
0.50
0
0.00
6
0.30
2
0.78
0
0.74
0
1.30
0
0.00
0
0.43
3
0.95
2
0.70
1
0.40
2
0.55
0
0.97
2
0.00
0
0.55
2
0.70
0
0.00
0
0.45
3
0.72
0
0.80
2
0.75
7
0.00
0
0.28
3
0.30
0
0.30
1
1.15
1
0.65
1
0.42
2
0.00
5
0.00
0
0.66
0
0.42
2
0.50
1
0.75
1
0.65
0
0.00
0
0.70
0
1.00
1
0.53
6
0.00
0
0.00
0
0.00
0
0.50
3
0.43
0
Average Average Dissolved
Water
Stream Stream OxygenTemperatu
Depth (m)Width (m) (mg/L) re (deg C)
0.10
5.3
7.43
22.7
0.10
3.8
7.90
18.3
0.39
4.1
6.94
26.1
0.10
2.4
5.36
24.3
0.98
6.2
4.70
21.2
0.30
6.8
5.91
19.7
0.71
1.8
5.99
26.3
0.75
2.2
7.80
18.4
0.10
2.6
9.18
18.7
0.20
3.5
24.6
0.10
1.4
8.64
16.5
0.10
3.2
10.51
22.7
0.20
6.2
6.98
23.0
0.71
2.6
4.09
16.6
0.20
2.4
8.50
18.0
0.10
5.5
9.04
17.3
0.61
2.8
7.70
23.0
0.00
3.3
8.14
21.1
0.20
2.4
6.97
24.9
0.10
3.1
8.30
18.6
0.10
4.0
9.09
20.2
0.30
6.3
7.95
23.6
0.00
2.0
7.91
21.8
0.85
2.1
9.15
18.5
0.10
3.0
10.48
21.3
0.10
4.3
8.13
12.7
0.10
4.6
7.76
24.0
0.10
3.8
7.36
20.6
0.10
2.7
9.76
16.8
0.00
2.4
7.24
24.4
0.10
2.2
4.67
23.5
0.10
2.2
6.87
25.3
0.30
4.2
7.22
18.7
0.10
3.6
6.61
24.3
0.10
5.2
6.76
20.6
0.32
5.3
6.15
27.4
0.83
2.9
7.44
24.1
0.20
2.9
6.35
23.0
0.10
3.8
6.51
24.9
0.95
4.2
8.39
16.5
0.45
2.8
7.96
19.9
0.78
8.5
4.79
17.0
0.10
4.3
7.90
21.3
0.93
7.7
7.92
26.1
pHConductivit Turbidity
Total Alkalinity
y (uS)
(NTU) Hardness (mg/L)
(mg/L)
6.63
50.4
17.30
6.78
34.3
18.90
11.0
15
7.30
79.1
5.78
8.30
3061.0
2.70
68.4
900
8.09
1909.0
3.10
68.4
560
7.91
1325.0
4.20
51.3
350
7.25
97.8
20.10
7.02
33.9
15.80
6.88
41.7
8.10
7.65
132.8
16.00
7.17
44.3
27.90
7.66
130.9
5.63
6.80
66.5
16.40
7.30
77.8
19.10
27.0
40
185.1
7.42
97.2
19.40
7.35
124.4
8.31
50.0
65
7.50
127.9
5.36
6.89
44.7
35.90
26.0
60
45.9
11.70
6.72
25.9
8.97
6.78
44.1
14.00
7.79
382.8
20.30
6.62
38.7
7.10
6.74
48.3
4.14
61.2
11.60
23.0
35
6.81
38.2
6.51
7.39
129.8
7.85
7.10
35.8
19.70
7.41
142.1
16.80
6.96
129.1
21.40
7.54
412.0
13.40
6.89
53.3
14.90
7.64
282.4
17.80
7.48
262.4
14.60
16.0
65
7.50
82.0
2.73
7.28
437.7
5.66
7.01
114.5
7.64
6.84
208.3
27.50
7.35
64.2
8.63
24.0
40
68.1
9.77
7.72
82.2
8.76
31.0
50
6.71
42.9
21.00
7.45
110.6
21
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Wood Creek
2
0.35
4
0.10
3.1
7.99
22.4
7.20
41.8
8.68
June 2001
Georgia Environmental Protection Division
22
Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Name
Beaverdam Creek Big Sandy Creek Buck Creek Chambliss Creek Deer Creek U/S Deer Creek D/S Bunn Rd Douglas Creek Falling Creek Herds Creek at CR 198 Herds Creek at GA 212 Kinnard Creek Lee Creek Little Buck Creek Little Falling Creek Long Branch Panther Creek Prairie Creek Rock Creek Rocky Creek - Bibb Rocky Creek - Monroe Sabbath Creek Swan Creek U/S Tobesofkee Creek lower Towaliga River Troublesome Creek Tussahaw Creek lower Yellow Creek Yellow Water Creek Trib D/S Yellow Water Creek U/S Yellow Water Creek
June 2001
Table 9. 1999 EPD's Field Measurements and Water Chemistry (Unimpaired)
Depth (m) Width (m) DO (mg/L)
Water
Temperature
(deg C)
0.25
5.29
9.45
13.44
0.30
8.70
10.21
10.39
0.34
13.30
8.82
13.49
0.11
3.38
9.56
13.72
0.18
4.55
10.23
12.42
0.16
3.26
9.18
15.12
0.23
2.31
na
10.91
0.39
10.11
11.52
6.61
0.11
2.05
10.29
12.44
0.37
6.35
8.98
15.31
0.22
3.27
9.32
14.83
0.18
0.46
10.02
11.39
0.33
4.70
9.40
12.62
1.25
10.50
10.20
7.32
0.34
3.43
9.11
8.11
0.125
2.03
7.64
19.27
0.47
5.53
8.80
14.11
0.11
0.45
9.60
11.90
0.35
5.03
10.29
11.07
-
-
10.00
9.50
0.38
5.17
9.60
12.85
0.18
2.02
8.5
15.45
0.18
4.58
8.50
14.37
0.35
13.05
11.42
4.31
0.19
6.46
na
8.90
0.47
8.89
na
9.62
0.25
6.44
9.38
13.57
0.095
1.62
6.41
22.24
0.45
5.46
9.73
7.85
0.31
6.67
-
n/a
pH Conductivity Turbidity
(umohs/cm)
(NTU)
TSS Chemical (mg/L) Violations
7.01
77
33
9
none
6.08
36
54
100
none
7.16
44
7
3
none
7.00
65
8
3
none
6.96
60
9
24
none
6.68
45
5
1
none
7.26
80
4
1
none
7.33
103
2
2
none
7.33
53
7
8
none
6.97
55
7
3
none
7.08
48
11
8
none
6.44
36
39
35
none
6.77
33
9
4
none
7.21
94
11
3
none
7.14
307
4
3
none
6.35
44
6
3
none
7.04
39
9
6
none
7.43
248
4
5
none
6.85
59
52
34
none
7.21
34
9
8
none
7.02
165
7
1
none
6.8
48
No sample taken
7.24
222
11
13
none
7.26
47
10
4
none
7.13
66
7
4
none
7.26
39
6
2
none
7.13
40
16
4
none
6.92
426
24
25
none
7.37
59
No sample taken
7.19
96
8
2
none
Georgia Environmental Protection Division
23
Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Name
Big Sandy Creek Butlers Creek Calaparchee Creek Cole Creek Eightmile Creek Galdesville Creek Hansford Branch Harmon Pye Branch Herds Creek at CR 159 Little Chehaw Creek Little Deer Creek Tributary Little Deer Creek U/S Little Deer Creek D/S Long Branch Malholms Creek Mill Dam Creek Phinazee Creek Red Creek Rock Creek Rocky Creek - Jasper Rocky Creek - Butts Rocky Creek - Bibb Rocky Creek - Monroe Rum Creek Sand Branch Scoggins Creek Third Branch Tobesofkee Creek Trib. Tobesofkee Creek U/S confluence Tobesofkee Creek D/S confluence Tobesofkee Creek middle Tobler Creek Town Branch D/S Jackson WPCP Town Branch - Rum Ck U/S Town Branch - Rum Ck D/S Walnut Creek Walnut Creek - upper White Creek Wise Creek Wood Creek Bay Creek Hartley Branch Little Shellstone Creek Sandy Run Creek Shellstone Creek Georgia Environmental Protection Division Atlanta, Georgia
June 2001
Table 9. 1999 EPD's Field Measurements and Water Chemistry (Impaired)
Depth (m)
Width (m)
DO (mg/L)
Water
Temperatur
e (deg
C)
pH Conductivit Turbidity
y
(NTU)
(umohs/cm)
TSS Chemical (mg/L) Violations
0.12
1.84
7.55
5.35
6.86
315
8
4
none
0.14
1.03
12.18
4.09
7.18
63
10
1
none
0.07
1.89
9.13
11.91
6.91
58
10
6
none
0.14
2.59
8.66
14.10
6.57
27
10
6
none
0.75
5.00
8.63
9.00
6.86
50
7
7
none
0.35
3.40
8.64
14.68
7.23
75
12
3
none
0.08
0.73
9.57
11.74
6.34
52
23
11
none
1.00
5.50
7.40
17.18
7.06
98
29
5
none
0.30
7.85
9.44
13.90
7.13
48
10
12
none
0.11
1.87
8.75
13.08
7.10
110
4
2
none
0.13
4.60
9.08
12.69
7.44
121
no sample taken
0.12
2.40
7.03
17.09
7.16
133
2
4
none
0.10
4.70
9.96
13.23
7.10
107
10
1
none
0.12
1.71
7.92
18.85
7.32
179
20
2
none
0.19
2.15
8.12
11.41
6.93
67
7
4
none
0.04
1.33
9.73
11.60
6.35
41
24
21
none
0.14
2.20
9.22
13.92
6.82
32
8
5
none
0.19
6.44
10.07
11.26
7.08
37
8
6
none
0.11
4.50
8.85
13.06
7.16
332
10
20
none
0.15
1.35
9.84
13.00
7.01
43
10
8
none
0.16
2.26
9.59
9.61
7.33
48
3
1
none
0.32
3.61
10.45
11.44
6.73
44
22
12
none
0.13
3.71
9.96
10.04
7.09
39
6
2
none
0.11
3.90
8.78
14.80
6.84
103
8
4
none
0.08
1.85
8.47
14.99
7.04
45
24
4
none
0.09
1.80
10.10
14.00
7.20
145
20
2
none
0.27
2.82
10.73
9.94
7.04
104
20
2
none
-
6.87
25.30
7.54
412
-
no sample taken
3.34
7.22
18.70
6.89
53
3.34
no sample taken
5.63
6.61
24.30
7.64
282
5.63
no sample taken
0.34
6.79
9.62
10.51
7.23
171
8
9
none
0.04
1.90
9.53
12.82
7.33
71
26
7
none
0.11
1.50
8.45
16.13
7.23
179
19
20
none
0.28
2.76
5.39
16.19
6.89
136
11
19
none
0.17
3.42
7.82
20.08
6.96
385
3
3
none
0.40
5.00
9.43
13.91
6.94
50
28
10
none
0.07
1.86
11.84
5.29
7.02
59
10
3
none
0.21
6.65
8.97
11.91
7.20
82
13
7
none
0.14
2.25
10.0.4
9.93
6.85
37
14
13
none
0.23
7.42
8.47
17.37
7.26
81
29
16
none
0.17
3.26
8.19
13.90
6.65
-
3.00
9.23
15.66
6.23
0.12
1.68
9.52
14.73
6.95
0.00
4.00
7.53
16.78
6.86
0.75
9.00
8.69
13.67
6.95
694
4
11
none
13
5
3
none
48
9
6
none
84
9
7
none
76
15
6
none
24
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
EPD also conduct macroinvertebrate sampling at several of the locations to provide additional information and/or insights to water quality conditions. Macroinvertebrate sampling was conducted using a modified version of EPA's Rapid Bioassessment Protocol III. Macroinvertebrate data results were evaluated using seven metrics as a measure of diversity, community composition (e.g., prevalence of tolerant or intolerant organisms), and environmental stress from a variety of possible sources. These data and metric calculation results were compared to those from five reference streams located in the Piedmont ecoregion (GAWPB, 2000). In conjunction with macroinvertebrate sampling, habitat assessments were performed. The habitat assessments were conducted using the same procedures described in the previous section.
Since WRD and EPD were conducting field sampling simultaneously, not all WRD impaired sites were monitored by EPD. Table 10 summaries EPD's macroinvertebrate study scores and includes the IBI, IBW, Benthic and Habitat Assessment scores. The watersheds are grouped by those that were not 303(d) listed and those that were. Table 11 provides EPD's detailed habitat assessment scores. Habitat scores are subjective measurements that can vary between evaluators, as well as temporally and spatially. In general, each habitat assessment score is the average of three independent values that are determined on the same day. WRD performed their habitat assessments from April through September. EPD performed their assessment from mid-August through early October. The correlation between WRD and EPD habitat scores is 29.0 percent. It should be noted that in 1999, WRD modified how it scored channel alteration based on comparative field scoring methods conducted between WRD and EPD.
Field personnel also performed a pebble count at those sampling locations where macroinvertebrate samples were collected. Pebble counts were conducted to document streambed particle-size distribution. The modified Wolman Pebble Count procedure was used, where 100 random particle samples are measured. A zig-zag collection technique was used that allows a longitudinal stream reach, incorporating pools and riffles, to be collected along a continuum instead of individual cross-sections (GAWPB, 2000). The results of the Pebble Count are given in Table 12.
Visual observations of the stream and watershed were also made by EPD personnel. The type of land use and the extent of land-disturbing activities and other pertinent features of the watershed were systematically observed from all available road accesses and were recorded. This information was used to determine the possible sources of eroded soils and other possible contaminants.
Georgia Environmental Protection Division
Atlanta, Georgia
25
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Name Deer Creek D/S Bunn Rd Douglas Creek Panther Creek Rocky Creek - Bibb Rocky Creek - Monroe Swan Creek U/S Towaliga River Troublesome Creek Yellow Water Creek Trib D/S Yellow Water Creek U/S Yellow Water Creek
Table 10. 1999 EPD's Macroinvertebrate Community Study Scores (Unimpaired)
County
Monroe Butts Butts Bibb
Monroe Lamar
Butts Spalding
Butts Butts Butts
IBIIBI Category Score
34
Fair
36
Fair
34
Fair
38
Fair
36
Fair
54 Excellent
36
Fair
48
Good
38
Fair
44
Good
36
Fair
IWB
IWB
Score Category
Benthic Score
Rank
5.5
Poor
0 Very poor
7.7
Good
6.9
Fair
72 Good/Fair
46.6
Poor
7.1
Fair
8
Fair
8.3 Excellent
70.6
Fair
7.6
Fair
7.1
Fair
6.8
Fair
0 Very Poor
8.2 Excellent In field rapid survey.
7.8
Fair In field rapid survey.
Habitat Total 94.50
100.00 127.00 120.00
110.00 90.90 83.60 87.50 55.60 85.00
June 2001
Georgia Environmental Protection Division
Atlanta, Georgia
26
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Table 10. 1999 EPD's Macroinvertebrate Community Study Scores (Impaired)
Name Big Sandy Creek Butlers Creek Calaparchee Creek Cole Creek Eightmile Creek Galdesville Creek Hansford Branch Little Chehaw Creek Little Deer Creek Tributary Little Deer Creek U/S Little Deer Creek D/S Long Branch Malholms Creek Mill Dam Creek Phinazee Creek Rocky Creek - Butts Rocky Creek - Bibb Rocky Creek - Monroe Rum Creek Sand Branch Scoggins Creek Third Branch Tobesofkee Creek Trib. Tobesofkee Creek U/S confluence Tobesofkee Creek D/S confluence Tobesofkee Creek middle Tobler Creek Town Branch D/S Jackson WPCP Town Branch - Rum Ck U/S Town Branch - Rum Ck D/S Walnut Creek Walnut Creek - upper Walnut Creek - lower White Creek Wise Creek Wood Creek Bay Creek
County
Butts Jones Monroe Lamar Monroe Jasper Monroe Jones Monroe Monroe Monroe Jasper Butts Monroe Monroe Butts
Bibb Monroe Monroe Monroe
Jones Jones Lamar Lamar Lamar Monroe Monroe Butts Monroe Monroe Crawford Jones Jones Monroe Jasper Monroe Peach
IBIIBI Category
IWB
Score
Score
24 Very Poor
4.9
22 Very Poor
4.7
20 Very Poor
4.7
28
Poor
5.4
30
Poor
5.7
22 Very Poor
22 Very Poor
5
22 Very Poor
5.4
30
Poor
5.2
30
Poor
5.9
28
Poor
6.2
30
Poor
6.3
26
Poor
4.9
24 Very Poor
6.1
26
Poor
4.9
26
Poor
4.5
28
Poor
5.5
20 Very Poor
4.8
32
Poor
6.6
30
Poor
6.5
20 Very Poor
32
Poor
6
16 Very Poor
2.9
28
Poor
6.1
30
Poor
6.4
34
Fair
6.8
22 Very Poor
4.8
24 Very Poor
4.8
18 Very Poor
5.4
22 Very Poor
4.1
30
Poor
5.3
24 Very Poor
4.6
32
Poor
6.7
28
Poor
6.1
34
Fair
6.1
28
Poor
6.5
WDR did not sample
IWB Benthic
Rank Habitat
Category
Score
Total
Very Poor
39
Poor
79.50
Very Poor
58
Fair
78.25
Very Poor
0 Very poor
62.50
Poor
no water in creek
Poor
too deep to sample
diverged creek for bridge construction.
Poor
87
Good
82.30
Poor
28
Poor
66.75
Poor
too small to sample
Fair
47
Poor
78.50
Fair
104.00
Fair
66 Good/Fair 114.78
Very Poor
0 Very poor
89.30
Fair
60
Fair
74.94
Very Poor
56
Fair 103.61
Very Poor
71 Good/Fair
83.25
Poor
0 Very poor
71.00
Very Poor
79
Good 117.30
Poor
49
Fair 105.00
Fair
54
Fair
91.63
39
Poor
78.00
Fair
Very Poor
10 Very Poor 118.50
Fair
46
Poor 101.00
Fair
49
Fair
98.00
Poor
Very Poor
0 Very poor
58.50
Very Poor
0 Very poor
83.50
Poor
42
Fair 122.75
Very Poor
60
Fair 122.08
Very Poor
Very Poor
46
Poor
75.00
Poor
57
Fair
72.25
Fair
61
Fair
92.31
Very Poor
Fair
75 Good/Fair 132.00
79.60
Georgia Environmental Protection Division Atlanta, Georgia
June 2001
27
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Georgia Environmental Protection Division
Atlanta, Georgia
28
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Table 11. 1999 EPD's Habitat Assessment Scores (Unimpaired)
June 2001
Instream Cover Epifaunal Substrate Embeddedness Channel Alteration Sediment Deposition Riffle Frequency Channel Flow Status Bank Vegetation (Left) Bank Vegetation (Right) Bank Stability (Left) Bank Stability (Right) Riparian Zone (Left) Riparian Zone (Right) Habitat Assessmen t Score
Name Deer Creek D/S Bunn Rd Douglas Creek Panther Creek Rocky Creek - Bibb Swan Creek U/S Towaliga River Troublesome Creek Yellow Water Creek Trib D/S Yellow Water Creek U/S Yellow Water Creek
9.75 4.00 4.75 17.50 5.75 3.75 7.25 8.00 7.75
13.67 7.33 9.33 16.67 9.00 8.00 9.00 6.67 5.67
14.25 9.25 12.50 17.25 12.25 11.25 9.50 7.00 7.25
16.00 6.00 13.00 17.00 14.00 9.00 10.00 7.00 4.00
11
9 12.5 12.5 12.5 12.5
9
7
7
8.60 4.80 1.30 16.00 3.00 5.20 11.60 7.20 7.60
12.40 5.40 3.40 16.40 5.40 5.00 9.60 6.20 4.00
9.25
8
7.5
16 8.25 4.5 8.75 4.75
4
7.2
2.8
0.8 10.2
1.2
4 11.8
4
4.2
10.80 2.20 2.60 18.20 5.00 5.80 8.80 4.40 4.20
4.25 4.50 8.00 9.25 94.50
4.33 4.67 5.00 0.67 100.00
4.75 5.00 8.50 8.25 127.00
6.00 4.00 6.00 8.00 120.00
4.5
6
3.5
3 110
7.00 6.40 4.40 7.80 90.90
5.00 3.20 6.60 1.00 83.60
3.25
3.5
5.5 4.25 87.5
4.2
4.4
0.2
0
55
3.00 3.20 9.00 8.40 85.60
Georgia Environmental Protection Division
Atlanta, Georgia
29
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Table 11. 1999 EPD's Habitat Assessment Scores (Impaired)
June 2001
Instream Cover Epifaunal Substrate Embeddedness Channel Alteration Sediment Deposition Riffle Frequency Channel Flow Status Bank Vegetation (Left) Bank Vegetation (Right) Bank Stability (Left) Bank Stability (Right) Riparian Zone (Left) Riparian Zone (Right) Habitat Assessmen t Score
Name Big Sandy Creek Butlers Creek Calaparchee Creek Cole Creek Eightmile Creek Galdesville Creek Hansford Branch Little Chehaw Creek Little Deer Creek Tributary Little Deer Creek U/S Little Deer Creek D/S Long Branch Malholms Creek Mill Dam Creek Phinazee Creek Rocky Creek - Butts Rocky Creek - Bibb Rocky Creek - Monroe Rum Creek Sand Branch Scoggins Creek Tobesofkee Creek Trib. Tobesofkee Creek U/S confluence Tobesofkee Creek D/S confluence Tobler Creek Town Branch D/S Jackson WPCP Town Branch - Rum Ck U/S Town Branch - Rum Ck D/S Walnut Creek - upper Walnut Creek - lower White Creek Wood Creek Bay Creek
Georgia Environmental Protection Division Atlanta, Georgia
9.75 9.50 6.75
8.00
7.33 9.50
4.50 14.60 13.66 10.00
7.00 11.33 12.00
6.75 11.66
8.00 8.66 6.50 6.00 12.00 9.00 3.25 6.25 13.00 12.00 6.75 7.25 11.33 16.50 7.70
1.75 7.00 1.75
0.00
4.00 2.00
3.00 10.20
7.00 1.70 1.66 7.66 6.50 1.75 6.00 7.00 7.66 2.25 19.50 11.00 12.50 1.00 2.25 8.75 11.50 2.50 2.25 7.00 9.50 2.30
4.75 6.75 2.75
0.00
3.33 4.25
2.50 4.40 15.00 3.30 3.66 5.66 5.50 6.00 7.66 8.00 6.00 4.75 10.50 8.00 2.00 1.50 7.00 8.50 12.00 5.00 2.00 7.33 11.25 3.00
17.25 16.75 16.00
16.00
18.33 16.50
16.00 16.80 17.66 17.30 17.00 18.00 17.75 16.75 16.66 18.00 15.00 17.00 16.00 12.00 17.00 18.25 16.25 15.75 16.50 17.25 16.00 16.66 18.50 15.00
5.25 0.75 8.00 3.75 4.00 4.00 6.75 3.50 5.75 1.75 2.25 0.50 4.50 0.75 5.00 3.25 2.75 1.50
no water in creek 1.00 0.00 13.00 8.75 8.75 4.50 diverged creek for new bridge construction. 3.00 3.66 7.00 6.00 6.00 2.66 4.00 0.25 7.75 6.50 5.25 3.25
too small to sample 3.50 4.50 6.00 6.00 6.50 5.50 7.00 7.00 9.20 7.20 5.80 5.40 10.66 8.33 8.50 4.66 4.66 3.66 5.00 0.00 7.30 7.00 7.00 7.00 3.00 1.66 6.33 5.66 6.33 2.66 6.66 10.66 7.00 6.66 6.33 3.66 6.75 12.25 6.75 5.00 2.25 4.50 6.00 0.25 7.50 3.25 3.50 4.75 8.33 15.00 7.66 8.00 8.00 5.33 6.00 14.00 8.00 4.00 4.00 4.00 6.00 8.33 7.66 6.00 6.66 4.33 4.50 1.75 6.25 5.25 6.00 2.75 9.00 9.00 14.50 7.00 5.00 6.00 10.00 14.00 10.00 2.00 3.00 4.00 5.00 17.00 11.50 2.00 2.00 0.50 1.25 0.00 4.00 4.50 4.50 1.75 8.25 1.75 8.25 5.25 5.00 4.25 11.00 11.50 12.00 6.50 7.25 7.50 10.25 11.33 12.25 6.75 6.75 3.00 5.25 1.00 6.75 4.00 4.25 1.75 3.50 0.75 9.00 7.00 7.50 6.50 5.33 10.00 7.33 5.00 5.00 4.00 10.25 9.75 6.75 8.25 8.50 7.75 5.00 3.70 13.30 4.00 5.00 3.60
4.00 0.75 1.25
7.50 8.25 6.25
8.75 8.75 9.50
79.50 78.25 62.00
5.25 9.25 9.25 83.75
2.66 3.25
9.00 3.25
9.33 82.30 1.00 66.75
4.00 3.80 2.33 6.00 2.66 2.66 4.00 5.50 5.00 4.00 5.00 2.50 6.00 2.00 0.50 2.25 4.50 7.75 2.75 1.50 6.75 3.00 6.75 3.00
9.00 7.60 9.33 8.70 8.66 9.00 0.00 4.50 9.00 10.00 4.33 9.25 7.00 6.00 9.00 8.00 5.00 4.50 8.00 9.50 2.00 7.00 9.50 6.00
7.50 5.00 9.33 9.00 8.66 8.33 0.00 4.50 9.00 10.00 6.00 9.25 3.00 7.00 10.00 8.25 9.50 8.75 9.00 9.50 1.75 3.33 8.75 8.00
78.50 104.00 114.78
89.30 74.94 103.61 83.25 71.00 117.30 105.00 91.63 78.00 118.50 101.00 98.00 58.50 83.50 122.75 122.08 75.00 72.25 92.31 132.00 79.60
30
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Georgia Environmental Protection Division
Atlanta, Georgia
31
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Name
Table 12. Pebble Counts (Unimpaired)
June 2001
Silt/Clay/Sand <4 mm Fine Gravel l 4-6 mm Fine Gravel 6-8 mm Medium Gravel 8-10 mm Coarse to Very Coarse >10 mm Small Cobble 64 - 127 mm Large Cobble 128-255 mm Small Boulder 256-511 mm Medium Boulder 512-1023 mm Large Boulder 1024-2047 mm Very Large Boulder Bedrock Total
Deer Creek D/S Bunn Rd
Douglas Creek Panther Creek Rocky Creek - Bibb Swan Creek U/S Towaliga River Troublesome Creek Yellow Water Creek Trib D/S Yellow Water Creek U/S Yellow Water Creek
43
6
5
3
29
10
3
0
0
0
1
0
100
33
4
0
4
2
6
15
16
6
6
8
0
100
17
0
0
8
0
25
0
50
0
0
0
0
100
59
1
0
1
27
4
0
1
0
7
0
0
100
rapid field survey conducted before pebble count was adopted in revised SOP
rapid field survey conducted before pebble count was adopted in revised SOP
Georgia Environmental Protection Division
Atlanta, Georgia
32
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Table 12. Pebble Counts (Impaired)
June 2001
Silt/Clay/Sand <4 mm Fine Gravel l 4-6 mm Fine Gravel 6-8 mm Medium Gravel 8-10 mm Coarse to Very Coarse >10 mm Small Cobble 64 - 127 mm Large Cobble 128-255 mm Small Boulder 256-511 mm Medium Boulder 512-1023 mm Large Boulder 1024-2047 mm Very Large Boulder Bedrock Total
Name Big Sandy Creek Butlers Creek Calaparchee Creek Cole Creek Eightmile Creek Galdesville Creek Hansford Branch Little Chehaw Creek Little Deer Creek Tributary Little Deer Creek U/S Little Deer Creek D/S Long Branch Malholms Creek Mill Dam Creek Phinazee Creek Rocky Creek - Butts Rocky Creek - Bibb Rocky Creek - Monroe Rum Creek Sand Branch Scoggins Creek Tobesofkee Creek Trib. Tobesofkee Creek U/S confluence Tobesofkee Creek D/S confluence Tobler Creek Town Branch D/S Jackson WPCP Town Branch - Rum Ck U/S Town Branch - Rum Ck D/S Walnut Creek - upper Walnut Creek - lower White Creek Wood Creek Bay Creek
68
7
4
5
16
0
0
0
0
0
0
0
100
60
7
5
7
11
0
0
2
0
1
7
0
100
92
2
3
0
3
0
0
0
0
0
0
0
100
rapid field survey conducted before pebble count was adopted in revised SOP
49
0
0
0
3
4
4
2
3
5
30
0
100
Diverged creek for new bridge construction
73
7
1
1
16
2
0
0
0
0
0
0
100
74
8
3
4
8
0
0
0
0
0
0
3
100
Too small to sample
70
2
4
3
20
1
0
0
0
0
0
0
100
rapid field survey conducted before pebble count was adopted in revised SOP
41
3
4
5
25
8
3
0
3
0
8
0
100
100
0
0
0
0
0
0
0
0
0
0
0
100
84
4
1
2
9
0
0
0
0
0
0
0
100
41
2
0
3
54
0
0
0
0
0
0
0
100
50
11
2
7
30
0
0
0
0
0
0
0
100
87
4
0
3
6
0
0
0
0
0
0
0
100
60
3
10
4
22
1
0
0
0
0
0
0
100
rapid field survey conducted before pebble count was adopted in revised SOP
63
3
2
2
12
12
1
1
4
0
0
0
100
77
2
0
5
16
0
0
0
0
0
0
0
100
rapid field survey conducted before pebble count was adopted in revised SOP
rapid field survey conducted before pebble count was adopted in revised SOP
rapid field survey conducted before pebble count was adopted in revised SOP
72
5
5
4
12
0
0
1
0
0
1
0
100
67
2
3
7
19
2
0
0
0
0
0
0
100
31
0
0
2
10
5
8
4
0
0
40
0
100
15
0
0
2
28
12
23
3
0
0
17
0
100
98
0
0
0
2
0
0
0
0
0
0
0
100
62
15
10
8
5
0
0
0
0
0
0
0
100
54
4
2
9
19
0
0
0
0
0
12
0
100
70
3
0
2
3
3
12
0
0
2
5
0
100
Did not sample
Georgia Environmental Protection Division
Atlanta, Georgia
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
3.0 SOURCE ASSESSMENT
June 2001
A healthy aquatic ecosystem requires a healthy habitat. The major disturbance to stream habitats is erosion and sedimentation. As sediment is carried into the stream, it changes the stream bottom and smothers sensitive organisms. Turbidity associated with sediment loads may also impair recreational and drinking water uses (GAEPD, 1998).
A source assessment characterizes the known and suspected sources of sediment in the watershed for use in a water quality model and the development of the TMDL. The general sources of sediment are point and nonpoint sources. National Pollutant Discharge Elimination System (NPDES) permittees discharging treated wastewater are the primary point sources of sediment as total suspended solids (TSS) and/or turbidity.
Nonpoint sources of sediment are diffuse sources that cannot be identified as entering the water body at a single location. These sources generally involve land use activities that contribute sediment to streams during a rainfall runoff event. Nonpoint sources of sediment included in the source assessment analysis are:
Silviculture, Agriculture, Grazing areas, Mining sites, Roads, and Urban Development
For Nonpoint sources involving silviculture, the Georgia Forestry Commission (GFC) was consulted for information and parameters regarding silviculture activities. The Natural Resources Conservation Service (NRCS) was consulted for information and parameters regarding agricultural activities.
3.1 Point Source Assessment
For purposes of this TMDL, facilities permitted under the National Pollutant Discharge Elimination System (NPDES) will be considered point sources. Discharges from municipal and industrial facilities may contribute sediment to receiving waters as TSS and/or turbidity. There are nine permitted NPDES discharges identified in the Ocmulgee River Basin watersheds upstream from the listed segments (see Table 13).
Table 13 provides the permitted flow and TSS concentrations levels for the NPDES permits located in the impaired Ocmulgee River Basin watersheds, as well as the calculated TSS loads. The average levels discharged over the last nine years are also given. These data were determined from analysis of the available Discharge Monitoring Reports (DMR).
The following facilities report metals in their DMRs as a requirement of their NPDES permits: Barnesville, Fort Valley, Spring Industries, and William Carter Company. The City of Barnesville WPCP discharges to Tobesofkee Creek. This facility is permitted to discharge 0.066 mg/L zinc and exceeded its permit limit during two months in 1995, one month in 1996, and five months in 1997. On June 11, 1999, the zinc limits and monitoring requirements were removed from the Barnesville WPCP NPDES permit. The City of Fort Valley WPCP discharges to Bay Creek. This facility's DMRs indicate it exceeded its permitted zinc limit of 0.068 mg/L approximately one-third
Georgia Environmental Protection Division
Atlanta, Georgia
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June 2001
of the time since 1994. Spring Industries, Inc., discharges to Cabin Creek. Since 1993, this facility exceeded its permitted copper limit of 0.0065 mg/L in all but nine months, and exceeded its permitted zinc limit of 0.06 mg/L more than one-third of the time. The William Carter Company discharges to Tobesofkee Creek. This facility exceeded its permitted copper limit of 0.06 mg/L twice in 1993 and four times in 1994. In addition, this facility exceeded its permitted zinc limit of 0.0898 mg/L from 1992 to 1993 and five times since then, most recently in May 1997. The William Carter Company eliminated 90 percent of its discharge in early 2000, and is scheduled for closure in the summer of 2001. These metal exceedances may have affected the fish community in the listed stream segments.
The ammonia concentrations discharged from four municipal facilities, Barnesville, Forsyth, Griffin, and Jackson Southside, and one industrial facility, Spring Industries, were also reviewed. Effluent ammonia concentrations were developed for these facilities according to the 1999 Ambient Water Quality Criteria for Ammonia (USEPA, 1999a). The Barnesville WPCP, which discharges to Tobesofkee Creek, has monthly ammonia permit limits ranging from 2.0 to 17.4 mg/L. The ammonia limits based on the 1999 Ambient Water Quality Criteria for Ammonia range from 2.7 to 10.8 mg/L. This facility has never exceeded its permitted limits or the 1999 ammonia criteria limits. The Forsyth Northeast WPCP discharges to Town Creek, a tributary to Rum Creek. This facility has monthly ammonia permit limits ranging from 2.0 to 8.7 mg/L, which based on the 1999 ammonia criteria (ranging from 3.4 to 9.7 mg/L), are protective of the creek. However, this facility exceeded the 1999 ammonia criteria during June 1999. The Griffin WPCP, which discharges to Cabin Creek, a tributary of the Towaliga River, has monthly ammonia limits ranging from 3.3 to 10.6 mg/L. Monthly ammonia limits calculated using the 1999 Ambient Water Quality Criteria for Ammonia range from 2.4 to 7.75 mg/L. Based on available DMR data, this facility exceeded these 1999 ammonia criteria once in 1994, 1995 and 1996, and twice in 1997, 1998 and 1999. Jackson Southside WPCP has a permitted ammonia limit of 1.0 mg/L, which was found to be protective of the stream. However, the Jackson Southside WPCP, which discharges into Town Branch, a tributary to Aboothlacoosta Creek, was found to have one discharge in April 1996 that exceeded the 1999 ammonia criteria of 1.52 mg/L. Spring Industries, Inc. discharges to Cabin Creek. Although, ammonia limits are not specificied in this facility's NPDES permit, monitoring is required. This facility exceeded the 1999 ammonia criteria of 3.04 mg/L during three months between 1997 and 1999. These high ammonia discharges may have affected the fish communities in the listed stream segments.
There was a fish kill in Walnut Creek, as a result of a manure lagoon discharge, during 1998. The spill resulted in approximately 19,059 fish killed and the suspected cause was DO depletion within the stream. This may also have been contributed to the low fish scores measured in this stream segment (GAEPD 1998-1999).
Soil erosion from construction sites is also a major source of sediment in Georgia's streams. Georgia requires construction sites over five acres to have a General Storm Water NPDES permit. Since construction sites are regulated by NPDES permits, they will be considered as point sources.
3.2 Nonpoint Source Assessment
Eroded soils from forests, cropland, mining sites, and other land can be transported to Georgia streams through runoff. Excessive sediment that reaches the water bodies can cause several changes to the stream. It can make the streams shallower and wider, affecting the stream's temperature, dissolved oxygen, flow rate and velocity. It can affect the ability of the stream to assimilate pollutants. It can change the diversity of fish populations and other biological
Georgia Environmental Protection Division
Atlanta, Georgia
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Table 13. NPDES Permit Limits For Facilities in the Impaired Watersheds of the Ocmulgee River Basin
FACILITY NPDES PERMIT NO
FACILITY TYPE RECEIVING WATER
FLOW (MGD) TSS (mg/L)
Davidson Mineral Prop - outfall no. 001 GA0046558 Industrial Little Deer Creek
Daily Average Monthly Max Daily Average Monthly Max
outfall no. 002
Georgia Environmental Protection Division Atlanta, Georgia
June 2001
NA NA 55 110 0.42 1.75 10.49 80
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Little Deer Creek
Spring Industries, Inc (Griffin) GA0003409 Industrial Cabin Creek
William Carter Company GA0003115 Industrial Tobesofkee Creek
Georgia Environmental Protection Division Atlanta, Georgia
June 2001
NA NA NA NA
0.21 0.5
7.83 70
NA NA
0.92 1.24
NA NA
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Barnesville Gordon Road WPCP GA0021041 Municipal Tobesofkee Creek
DOT-Rest Area #22/I-75 GA0023591 Municipal Little Deer Creek
Georgia Environmental Protection Division Atlanta, Georgia
June 2001
0.98 1.56
NA NA 30 45
0.93 2.50 16.94
46
0.045 0.056
30 45
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Fort Valley WPCP GA0031046 Municipal Bay Creek
to Indian Creek Tributary
Forsyth Northeast WPCP GA0031801 Municipal Town Creek
to Run Creek Tributary
Georgia Environmental Protection Division Atlanta, Georgia
June 2001
0.04 2.60 11.75
60
2.20 2.75
30 45
1.32 2.02 5.87 22.67
1.40 1.80
30 45
0.50 1.20
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Griffin Cabin Creek WPCP GA0020214 Municipal Cabin Creek
Jackson-Southside WPCP GA0023931 Municipal Town Branch
1Average annual load assumes discharge every day at average daily flow Georgia Environmental Protection Division Atlanta, Georgia
June 2001
7.63 33
1.50 1.88
30 45
1.18 2.15 12.98 42.5
NA NA 20 30
0.36 0.69 4.42 110
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
permit limits actual data from monthly DMR
Georgia Environmental Protection Division Atlanta, Georgia
June 2001
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June 2001
communities. It can also cause increased flooding. In addition, harmful pollutants attached to the sediment can be transported to rivers and streams.
3.2.1 Silviculture
Georgia has 23.6 million acres of commercial forests. This represents approximately 64 percent of all of Georgia's land use. Approximately 68 percent of the commercial forests are privately owned, 25 percent are owned by industry, and 7 percent are publicly held (GAEPD, 1999).
The majority of soil erosion from forested land occurs during timber harvesting and the period immediately following, during reforestation. Once the forest is re-established, very little soil erosion occurs. Timber harvesting includes the layout of access roads, log decks, and skid trails; the construction and stabilization of these areas; and the cutting of trees. Both hardwoods and pines are harvested throughout Georgia. A minimum harvest is usually ten acres and the percent of forest that is harvested each year varies from county to county. Table 14 lists the percent timberland and percent harvested per year by county.
Table 14. Percent Timberland and Percent Harvested per Year by County
County
Total Area (1000 acres)
Timberland (1000 acres)
Growing Annual Annual
Percent
Stock
Volume percent
Timberland Volume Removal Removal
(million ft3) a (million ft3)
Bibb
160
87.1
54.44%
97.2
8.2
8.44%
Bleckley
139.1
78.6
56.51%
139.3
2.4
1.72%
Butts
119.4
83.3
69.77%
110.8
6.1
5.51%
Crawford
208.1
163.2
78.42%
119.3
9.5
7.96%
Gwinnett
277
104.4
37.69%
227.6
13.3
5.84%
Henry
206.5
109.7
53.12%
198.8
8
4.02%
Jasper
237.1
190.7
80.43%
304.3
9.4
3.09%
Jones
252
210.7
83.61%
309.8
17
5.49%
Lamar
118.3
72.1
60.95%
81.2
3.3
4.06%
Monroe
253.2
194.3
76.74%
261.8
9
3.44%
Newton
176.9
98.7
55.79%
240.5
7.7
3.20%
Peach
96.7
40.9
42.30%
28.2
0
0.00%
Spalding
126.7
66.9
52.80%
95.9
11.4
11.89%
Twiggs
230.6
188.5
81.74%
214.8
20.3
9.45%
Walton
210.7
114.7
54.44%
250.4
a Estimate - does not include trees less than 5" DBH.
Source: Thomas, Michael T., 1997. Forest Statistics for Georgia
2.7
1.08%
Georgia Environmental Protection Division
Atlanta, Georgia
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3.2.2 Agriculture
June 2001
Agriculture can be a significant contributor of nonpoint pollutants to rivers and streams. Sediment and nutrients are the major pollutants of concern and cropland is one of the major sources of soil loss due to sheet and rill erosion. Over the last century there has been a dramatic decrease in the amount of land farmed in Georgia. In 1950, there were 208,000 farms encompassing 26 million acres in Georgia (U.S. Department of Agriculture, National Agricultural Statistics Service website). In 2000, there were approximately 11.1 million acres of farmland in Georgia, with the number of farms estimated to be 50,000 and the average farm size being approximately 222 acres. This represents a 57 percent reduction in farmland.
With the reduction in farmland, there has also been a decrease in the amount of soil erosion. The National Resources Inventory found the total wind and water erosion on cropland and Conservation Reserve Program land in Georgia declined 38 percent, from 3.1 billion tons per year in 1982 to 1.9 billion tons in 1997 (Source: 1997 NRI, USDA NRCS). This suggest that the source of sediment in many of the impaired streams in the Ocmulgee River Basin may be the result of past land use practices. Thus, it is believed that if sediment loads are maintained at acceptable levels, streams will repair themselves over time.
3.2.3 Grazing Areas
Farm animals grazing on pasture land can leave areas of ground with little or no vegetative cover. During a rainfall runoff event, the soil in the pastures is eroded and transported to nearby streams, typically by gully erosion. The amount of soil loss from gully erosion is generally less than that caused by sheet and rill erosion. Work in small grazed catchments in New Mexico found that gully erosion contributed only 1.4 percent of the total sediment load as compared to sheet and rill erosion. Other research had found that gully erosion typically contributes less than 30 percent of the total sediment load; however, contributions have ranged from 0 to 89 percent (USEPA, 2001b).
Beef cattle spend all their time grazing in pastures; while dairy cattle and hogs are confined periodically. Hog farms confine the animals or allow them to graze in small pastures or pens. On dairy farms, the cows are confined for a limited period each day, during which time they are fed and milked.
In addition, cattle and other unconfined animals often have direct access to streams that pass through pastures. As these animals walk down to the stream, they often damage stream banks. Stream bank vegetation is destroyed and the banks often collapse, resulting in increased sedimentation to the waterway.
3.2.4 Mining Sites
Minerals, rocks, and ores are found in natural deposits on or in the earth. Kaolin, clays, granite, marble, sand, gravel, and other mineral products are the materials primarily mined in Georgia. Surface mining involves the activities and processes used to remove minerals, ores, or other solid material. Tunnels, shafts and dimension stone quarries are not considered to be surface mines. Surface mining encompasses a variety of activities from sand dredging to open pit clay mining to hard rock aggregate quarrying.
Georgia Environmental Protection Division
Atlanta, Georgia
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Removal of vegetation, displacement of soils and other significant land disturbing activities are typically associated with surface mining. These operations can result in accelerated erosion
Georgia Environmental Protection Division
Atlanta, Georgia
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Table 15. Mines Located in the Ocmulgee River Basin Watersheds
Name
Company
Type
County
Current Status Material Mined
Bell Cochran Prospect
Unknown
Jasper
Exp Prospect
Mica
C A Ensign Mine
Underground Mine
Monroe
Past Producer Mica
C H Greer Mine
Surface Mine
Jasper
Past Producer Vermiculite
Calloway Mine
Surface Mine
Monroe
Past Producer Mica
Early Vaughn Mine
Surface/Underground Lamar
Past Producer Mica
F B Willingham Prospect
Surface/Underground Monroe
Developed Deposit Mica
Feldspar Corp. Jasper Quarry B
Feldspar Corp.
Surface/Underground Jasper
Past Producer Feldspar
Feldspar Corp/ Ga Mine & Plant
Feldspar Corp.
Surface Mine
Jasper
Producer
Feldspar
Fletcher Mine
Underground Mine
Monroe
Past Producer Mica
Grayson Granite Quarry
Vulcan Materials
Surface Mine
Gwinnett
Producer
Stone Granite CB
Grayson Quarry
United Materials Company
Surface Mine
Gwinnett
Producer
Stone Limestone
H B Manrey Prospect
Surfaced/Underground Lamar
Exp Prospect
Mica
H S Worsham Prospect
Unknown
Lamar
Exp Prospect
Mica
Hitchcock Quarry
Southern Aggregates
Surface Mine
Jones
Producer
Stone
Ingraham Prospects
Surface/Underground Lamar
Exp Prospect
Mica
L P Goodwin Mine
Surface Mine
Monroe
Past Producer Mica
Means Prospect
Underground Mine
Lamar
Developed Deposit Mica
Melton Prospects
Unknown
Spalding
Exp Prospect
Mica
Monroe Quarry
Davidson Mineral Properties
Surface Mine
Monroe
Producer
Stone Granite CB
Old Callaway Prospect
Surface Mine
Monroe
Exp Prospect
Mica
Old Childs Prospect
Surface/Underground Lamar
Developed Deposit Mica
Phinazee Mines
Surface/Underground Monroe
Past Producer Mica
Smith Mine
Surface/Underground Monroe
Past Producer Mica
The Turner Quarry
Surface Mine
Spalding
Past Producer Stone Feldspar
Thurman Mine
Underground Mine
Monroe
Past Producer Mica
Turner Prospect
Underground Mine
Jasper
Exp Prospect
Mica
U.S. Fuller Prospect
Unknown
Monroe
Raw Prospect
Mica
Westbrook's Prospect
Underground Mine
Monroe
Developed Deposit Mica
Worsham & Goodwin Prospect
Unknown
Monroe
Exp Prospect
Mica
Source: USEPA, 2001a. Watershed Characterization System (WCS) Data, Georgia, US. Tetra Tech, Environmental Protection Agency, Region IV, Atlanta, Georgia
, Jan 31, 2001.
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Atlanta, Georgia
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June 2001
and sedimentation of surface waters. Table 15 lists the active, inactive, and exploratory mines located in the watersheds monitored in the Ocmulgee River Basin.
3.2.5 Roads
Erosion from unpaved roadways can be a significant source of sediment to our rivers and streams. It occurs when soil particles are loosened and carried away from the roadway, ditch, or road bank by water, wind, or traffic. The actual road construction (including erosive road-fill soil types, shape and size of coarse surface aggregate, poor subsurface and/or surface drainage, poor road bed construction, roadway shape, and inadequate runoff discharge outlets or "turn-outs" from the roadway) may aggravate roadway erosion. In addition, external factors such as roadway shading and light exposure, traffic patterns, and road maintenance may also affect roadway erosion.
Exposed soils, high runoff velocities and volumes, and poor road compaction all increase the potential for erosion. Loose soil particles are often carried from the road bed into the roadway drainage ditches. Some of these particles settle out satisfactorily, but usually they settle out poorly, causing diminished ditch carrying capacity resulting in roadway flooding and, subsequently, more roadway erosion (Choctawhatchee, et. al, 2000).
3.2.6 Urban Development
Soil erosion from land disturbing activities is a major source of sediment in Georgia's streams. Land-disturbing activities are defined as any activity that may result in soil erosion and the movement of sediments into state waters or on lands of the state. Examples of land disturbing activities include, clearing, grading, excavating, or filling of land. The following activities are unconditionally exempt from the provisions of the Erosion and Sedimentation Act; surface mining, granite quarrying, minor land-disturbing activities such as home gardens and landscaping, agricultural and silvicultural operations, and any project carried out under the technical supervision of the NRCS.
Conversion of forest to urban land use is often associated with water quality degradation. From 1982 through 1989, the area classified as commercial forest within the Ocmulgee River Basin decreased by approximately 1053 acres or 0.0045 percent (GAEPD, 1998). It should be noted that forest undergoing conversion to another land use is not considered silviculture, but rather a land disturbing activity.
Storm water runoff from developed urban areas can also have an impact on the transport of sediment to and within streams. Urbanization increases imperviousness, resulting in an increase in the volume of runoff entering the streams. In addition, the streamflow rates may increase significantly from pre-construction rates causing stream bank erosion and stream bottom down cutting.
Georgia Environmental Protection Division
Atlanta, Georgia
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
4.0 MODELING APPROACH
June 2001
Establishing the relationship between the in-stream water quality and the source loadings is an important component of TMDL development. It provides for both the identification of sources, and their relative contribution, as well as the examination of potential water quality changes resulting from varying management options to meet the water quality standard. This relationship can be developed using a variety of techniques ranging from simple methods based on scientific principles to more complex numerical computer modeling techniques.
In this section, the numerical modeling techniques developed to simulate sediment fate and transport in the watershed are discussed. The limited amount of sediment loading data and instream sediment information prevents EPD from using a dynamic watershed runoff model, which requires a great deal of data for model development and calibration. Instead, EPD determined the annual sediment loads delivered to the stream from the surrounding watershed. This TMDL does not address in-stream sedimentation processes, such as bank erosion and stream bottom down cutting, since computer models that simulate these processes are not available at this time.
4.1 Model Selection
The Agricultural Research Station (ARS) developed the Universal Soil Loss Equation (USLE) over 30 years ago. It is the most widely accepted and most used soil loss equation. It was designed as a method to predict average annual soil loss caused by sheet and rill erosion. The USLE can estimate long-term soil loss, and can assist in choosing proper cropping, management and conservation practices. However, it cannot be used to determine erosion for a specific year or specific storm. Because of the wide acceptance by the forestry, agricultural, and academic communities, the USLE was selected as the tool for estimating long-term annual soil erosion, assessing the impacts of various land uses, and evaluating the benefits of various Best Management Practices (BMPs).
4.2 Universal Soil Loss Equation
For each of the watersheds monitored in the Ocmulgee River Basin, the existing annual sediment load was estimated using the USLE. The USLE predicts the average annual soil loss caused by sheet and rill erosion. Soil loss from sheet and rill erosion is mainly due to detachment of soil particles during rainfall events. It is the major source of soil loss from crop production and animal grazing areas, logging areas, mine sites, unpaved roads, and construction sites. The equation used for estimating average annual soil erosion is:
Where:
A = RKLSCP
A = average annual soil loss in tons/acre R = rainfall erosivity index K = soil erodibility factor LS = topographic factor
L = slope length S = slope C = cropping factor P = conservation practice factor
Georgia Environmental Protection Division
Atlanta, Georgia
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June 2001
Georgia Environmental Protection Division
Atlanta, Georgia
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
4.2.1 Rainfall Erosivity Index
June 2001
The R factor or rainfall erosivity index describes the kinetic energy generated by the frequency and intensity of the rainfall. It is statistically calculated from the annual summation of rainfall energy in every storm, which correlates to the raindrop size, times its maximum 30-minute intensity. It varies geographically and ranges from 275 to 300 within the Ocmulgee River Basin.
4.2.2 Soil Erodibility Factor
The K factor or soil erodibility factor represents the susceptibility of soil to be eroded. This factor quantifies the cohesive or bonding character of the soil and ability of the soil to resist detachment and transport during a rainfall event. It is a function of the soil type, which is provided by the STATSGO data. Table 5 provides a breakdown of the soil type within each modeled watershed and the corresponding K factor. STATSGO soil data has a resolution of 1:250,000 and is available for all of Georgia. A higher-resolution (1:25,000) soil data, SSURGO, is available for fourteen Georgia counties. For consistency, it was decided that STATSGO data would be used for the first round or phase of sediment TMDLs because of its availability for all of Georgia. During the second phase of sediment TMDLS, if SSURGO data is available for all of Georgia, it may be used.
4.2.3 Topographic Factor
The LS factor or topographic factor represents the effect of slope length and slope steepness on erosion. Steeper slopes produce higher overland flow velocities. Longer slopes accumulate more runoff from larger areas and also result in higher overflow velocities. The slope length and slope is based on the grid size and ground slope provided by the USGS 30 by 30 meter Digital Elevation Model (DEM) grids downloaded from the State GIS clearinghouse.
4.2.4 Cropping factor
The C factor or cropping factor represents the effect plants, soil cover, soil biomass, and soil disturbing activities have on erosion. It is the most complicated of the USLE factors. It incorporates effects of tillage, crop type, cropping history, and crop yield. Cropping factors for forested, agricultural, and urban lands were provided by the Georgia Forestry Commission (GFC), Natural Resources Conservation Service (NRCS), and U.S. Environmental Protection Agency (EPA), respectively.
Forested land includes both mature trees and those being harvested. The forest C factor for each watershed was calculated based on the percent of forest harvested in each county (see Table 13). If a watershed is in multiple counties, the percent forest harvested is determined by area-weighting the forested area within each county.
C factors for cropland and pasture land for each county were developed by NRCS under the National Resource Inventory Program and are listed in Table 16. These values were developed based on the 1995 MRLC data. Low-level aerial photography was performed and the photographs are interpreted to identify land features. If data were not available for a given county, the C factor was calculated by averaging the C factors from all the surrounding counties. The crop and pasture land C factors for watersheds in multiple counties were determined by area-weighting the agricultural land use within each county.
Georgia Environmental Protection Division
Atlanta, Georgia
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Table 16. Cropland and Pasture C factors by County
County
C factor
Cropland
Pasture
Bibb
0.221
0.003
Bleckley
0.461
0.005
Butts
0.289
0.003
Crawford
0.479
0.011
Gwinnett
0.283
0.018
Henry
0.305
0.004
Jasper
0.143
0.003
Jones
0.349
0.012
Lamar
0.306
0.026
Monroe
0.298
0.003
Newton
0.286
0.005
Peach
0.324
0.028
Spalding
0.410
0.005
Twiggs
0.421
0.003
Walton
0.192
0.003
Source:, USDA-NCRS, 1997. National Resources Inventory; USDA-NCRS Athens, Georgia
C factors for the road network were determined based on the road surface and are given in Table 17. Road information, including road surface, was provided by the Georgia Department of Transportation (DOT). Data gaps were filled based on adjacent road surfaces and road types (i.e., state, county, private).
Table 17. Road C factors
Road Surface Rigid and High Flexible Road Bituminous Surfaced Road
Gravel or Stone Road Soil-Surfaced Road Primitive or Unimproved Road
Type 1 2 3 4 5
C factor 0.13 0.25 0.65 0.75 0.75
Georgia Environmental Protection Division
Atlanta, Georgia
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June 2001
C factors for other land uses including urban, mining, transitional, grass, and wetlands are listed in Table 18. These values were provided by the U.S. Environmental Protection Agency (EPA) and are used in all watersheds.
Table 18. Various Land Use C factors
Land Use Water Low Intensity Residential High Intensity Residential High Intensity Commercial, Industrial, Transportation Bare rock, sand, clay Quarries, strip mines, gravel pits Transitional Other Grasses Woody Wetlands Emergent Herbaceous Wetlands
C factor 0
0.02 0.005 0003
0 0.75 0.002 0.003 0.011 0.003
4.2.5 Conservation Practice Factor
The P factor or conservation practice factor represents the effects of conservation practices on erosion. The conservation practices include Best Management Practices (BMPs) such as contour farming, strip cropping and terraces. In all cases, it was assumed that no BMPs were used and the P factor for all land uses was 1.0.
4.3 WCS Sediment Tool
EPA and Tetra Tech developed the Arcview-based Watershed Characterization System (WCS) to provide tools for characterizing various watersheds. WCS was used to display and analyze geographic information system (GIS) data including land use, soil type, ground slope, road networks, point source discharges, and watershed characteristics.
An extension of WCS is the Sediment Tool, which incorporates the USLE. The Sediment Tool can be used to perform the following tasks:
Estimate the extent and distribution of potential soil erosion within a watershed. Estimate the potential sediment delivery to the receiving water body. Evaluate the effects of land use, BMPs, and road networks on erosion and sediment
delivery.
Georgia Environmental Protection Division
Atlanta, Georgia
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
The watersheds of interest were delineated based on the RF3 stream coverage and elevation data. If there was no RF3 segment within the delineated watershed, the WCS Sediment Tool could not be used (i.e. Whitten Creek trib and Lake Sinclair trib).
A stream grid for each delineated watershed was created based on elevation data. The stream grid corresponded to a stream network with twenty-five 30 by 30 meter headwater cells (5.5 acres). The stream grid network has flow and can accumulate flow.
For each 30 by 30 meter grid cell within the watershed, the WCS Sediment Tool calculates the potential erosion using the USLE based on the specific cell characteristics. The model then calculates the potential sediment delivery to the stream grid network. Sediment delivery can be calculated using one of the four available sediment delivery equations:
Distance-based equation Md = M * (1-0.97 * D/L)
where Md = mass moved (tons/acre/yr) M = sediment mass eroded (ton) D = least cost distance from a cell to the nearest stream grid (ft) L = maximum distance the sediment may travel (ft)
Distance Slope-based equation DR = exp(-0.4233 * L * Sf) Sf = exp (-16.1 * r/L+ 0.057)) - 0.6
where DR = sediment delivery ration L = distance to the stream ( m) r = relief to the stream (m)
Area-based equation DR = 0.417762 * A (-0.134958) - 1.27097,
where DR = sediment delivery ratio A = area (sq miles)
DR <= 1.0
WEPP-based regression equation Z = 0.9004 - 0.1341 * X2 + X3 - 0.0399 * Y + 0.0144 * Y2 + 0.00308 * Y3
where Z = percent of source sediment passing to the next grid cell X = cumulative distance downslope Y = percent slope in the grid cell
Based on work previously performed by EPA on the Chattooga River Watershed, it was determined that the distance slope-based equation provided the best prediction of the sediment delivery (USEPA, 2001b).
The WCS Sediment Tool estimates the total soil erosion and sediment delivered to the stream from each grid cell due to land use cover and from the grids representing roads.
Georgia Environmental Protection Division
Atlanta, Georgia
52
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
5.0 TOTAL MAXIMUM DAILY LOAD
A Total Maximum Daily Load (TMDL) is the amount of a pollutant that can be assimilated by the receiving waterbody without exceeding the applicable water quality standard; in this case the narrative water quality standard for aquatic life. TMDLs establish allowable pollutant loadings that are less than or equal to the TMDL, and thereby provide the basis to establish water quality based controls. For some pollutants, TMDLs are expressed on a mass loading basis. This TMDL determines the range of sediment load that can enter the Ocmulgee River Basin watersheds without causing additional impairment to the stream.
A TMDL is the sum of the individual waste load allocations (WLA) for point sources and load allocations (LA) for nonpoint sources and natural background (40 CFR 130.2). The sum of these components may not result in an exceedance of water quality standards for a water body. To protect against exceedances, the TMDL must also include a margin of safety (MOS), either implicitly or explicitly, that accounts for the uncertainty in the relationship between pollutant loads and the water quality response of the receiving water body. Conceptually, a TMDL can be expressed as follows:
TMDL = WLAs + LAs + MOS
The total maximum daily load of sediment was determined by adding the WLA and the LA. The MOS (as described in Section 5.4) was implicitly included in the TMDL analysis and does not factor directly in the TMDL equation as shown above. The following sections describe the various TMDL components and the TMDLs for each watershed are summarized in Appendix A.
5.1 Waste Load Allocations
The waste load allocations are provided to the point sources. There are twelve permitted facilities in the Ocmulgee River Basin watersheds. Their daily maximum and annual allocated TSS loads are given in Table 19.
Table 19. Waste Load Allocations
FACILITY
NPDES PERMIT NO
RECEIVING WATER
COUNTY
Davidson Mineral Prop - outfall no. 001 GA0046558 Little Deer Creek
Davidson Mineral Prop - outfall no. 002 GA0046558 Little Deer Creek
Spring Industries, Inc (Griffin)
GA0003409 Cabin Creek
William Carter Company
GA0003115 Tobesofkee Creek
Barnesville Gordon Road WPCP
GA0021041 Tobesofkee Creek
Monroe Monroe Spaulding Lamar Lamar
DOT-Rest Area #22/I-75 Forsyth Northeast WPCP Fort Valley WPCP Griffin Cabin Creek WPCP Jackson-Southside WPCP
GA0023591 Little Deer Creek
Monroe
GA0031801 Town Creek to Rum Creek Trib Monroe
GA0031046 Bay Creek to Indian Creek Trib Peach
GA0020214 Cabin Creek
Spaulding
GA0023931 Town Branch
Butts
TSS LOAD
Daily Max Annual (lbs/day) (ton/yr)
193
35
14
3
1037
189
654
119
233
43
11
2
350
64
550
100
375
68
60
11
Georgia Environmental Protection Division
Atlanta, Georgia
53
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
The daily maximum TSS load was calculated based on the permitted maximum TSS and the average or permitted flow. The annual TSS load was calculated based on the average permitted TSS and the average or permitted flow. For those facilities that are only permitted for turbidity, the relationship between TSS and turbidity developed from EPD field measurements was used to calculate the TSS loads.
The sediment load allocation from future construction sites within the watershed will have to meet the requirements outlined in the Georgia General Storm Water NPDES Permit for Construction Activities. This permit authorizes the discharge of storm water associated with construction activity to the waters of the State in accordance with the limitations, monitoring requirements, and other conditions set forth in Parts I through VII of the Georgia Storm Water Permit. The conditions of the permit were established to assure that the storm water runoff from these sites does not cause or contribute sediment to the stream. Georgia's General Storm Water Permit can be considered a water quality-based permit in that the numeric limits in the permit, if met, will not cause a water quality problem.
5.2 Load Allocations
The USLE was used to determine the relative sediment contributions from each significant land use. The USLE was applied to those watersheds that are biologically impaired and those that are not, to determine the current sediment loading rates to the streams. The sediment load allocation for each stream by land use, including roads, is reported in Table 20 . The watersheds are grouped by: those that are not on the 303(d) list (unimpaired) and those that are on the 303(d) list (impaired). For comparison purposes, the total sediment load in tons per acre per year is also given. The average sediment load in the watersheds that are biota impacted is 4.2 tons/acre/yr, ranging from 0.2 to 62.8 tons/acre/yr. The average sediment load in the unimpaired watersheds is 3.0 tons/acre/yr, ranging from 0.2 to 15.03 tons/acre/yr. Table 21 gives each sources' percent contribution to the total sediment load.
Understanding the potential sediment sources and the changes in land use that have occurred over the last century, provides insight into the streams current water quality issues. The average annual sediment load per unit area for the unimpaired and impaired watersheds are generally within the same range. Over the last century there has been a dramatic decrease in the amount of land farmed in Georgia. Since 1950, there has been a 57 percent reduction in farmland. With the reduction in farmland, there has also been a decrease in the amount of soil erosion. This suggests that the sedimentation observed in the impaired stream segments may be legacy sediment resulting from past land use practices. It is believed that if sediment loads are maintained at acceptable levels, streams will repair themselves over time.
5.3 Seasonal Variation
Sediment is expected to fluctuate according to the amount and distribution of rainfall. Since rainfall is greatest in the spring and winter seasons, it is expected that sediment loadings would be highest during these seasons. However, these seasonal fluctuations and other short-term variability in loading due to episodic events are usually evened out by the response of the biological community to habitat alteration, which is a long-term process. Therefore, the average annual sediment was determined.
Georgia Environmental Protection Division
Atlanta, Georgia
54
Open Water Low Intensity Residential High Intensity Residential High Intensity Commercial/ industrial Transportation Bare Rock Sand and Clay Quarries Strip Mines Gravel Pits Transitional Deciduous Forest Evergreen Forest Mixed Forest Pasture/Hay Row Crops Other Grasses (Urban Recreational) Woody Wetland Emergent Herbaceous Wetlands Road Total load (tons/acre/yr)
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Name
Table 20. Sediment Load Allocations (Unimpaired) Sediment Load (tons/yr)
June 2001
Alcovy River Beaverdam Creek Big Sandy Creek Buck Creek Chambliss Creek Deer Creek U/S Douglas Creek Falling Creek Herds Creek at CR 198 Herds Creek at GA 212 Kinnard Creek Lee Creek Little Buck Creek Little Deer Creek Little Falling Creek Long Branch Panther Creek Peeksville Creek Prairie Creek Rock Creek Rocky Creek - Bibb Rocky Creek - Monroe Sabbath Creek Swan Creek - U/S Swan Creek -D/S Tobesofkee Creek lower Towaliga River Town Branch U/S Troublesome Creek Tussahaw Creek Trib Tussahaw Creek upper Tussahaw Creek lower Yellow Creek Yellow Water Creek Trib Yellow Water Creek U/S Yellow Water Creek D/S Yellow Water Creek
0.0 5798.8
0.0 1505.0
0.0 1337.2
0.0 94.0
0.0 214.3
0.0
6.1
0.0 13.1
0.0 82.7
0.0
0.0
0.0
0.0
5.0
0.0
0.0
0.0
0.0
1.8
0.0 17.6
0.0
0.2
0.0
0.5
0.0
9.5
0.0 2015.7
0.0 54.5
0.0 4542.8
0.0
0.8
0.0
0.8
0.0 1702.5
0.0 1142.0
0.0 247.5
0.0 516.7
0.0
4.9
0.0 46.6
0.0 226.6
0.0
0.0 47.3
0.0 550.2
0.0 558.9
0.0 921.8
283.0 31.7 1.2 28.2
0.0
86.9 1.4
201.4
50.4 16.8
9.1 7.3 1.0 19.5 0.1 17.8 17.8 36.1
601.0 65.2
230.7 33.8 39.8 41.6 5.9 2.0 0.7 0.7 0.5
4.3 7.4
1.4 0.2 2.6 1.6 0.6 76.0 58.0 33.9 0.5 1.2 78.2 214.8 13.0 40.3 1.5 18.6 28.8 9.9 1.7 7.0 7.1 56.3
0.0 45766.3 0.0 0.0 3998.4
0.0 3571.1
0.0
0.0 38137.7 0.0
0.0 15306.4 0.0
341.9 0.0
0.0 41628.0 0.0 3998.4
0.0 3302.3 0.0
0.0
303.8 71.3
640.8 1.3
191.6
1.4 1.5 305.1
12.2 16.7
0.1
66.8 138.2 120.5
47.2
124.4 126.4
0.0
151.2
0.0 0.0 0.1
1356.7 221.0
1719.2 437.6 99.5 118.0 38.2
1144.6 15.8 64.3
162.4 31.4 35.6
135.4 241.6
17.6 10.0 34.5
9.4 39.0 187.0 701.0 22.7 11.7 54.0 606.5 1018.0
9.5 200.9
12.8 132.6 523.2 135.0
6.1 49.6 50.2 197.9
482.7 61.7
870.6 183.6
57.9 56.8 12.5 1263.6
3.8 50.3 85.5 28.3 22.2 97.3 194.0 10.9
2.8 15.8 10.5 41.8 73.6 304.5 22.6
2.4 35.4 370.9 630.2
5.5 191.3
7.6 70.4 373.5 68.6
1.6 22.8 22.9 78.8
643.8 21303.9 156398.6
57.8 17.9 16720.0
987.1 6004.7 187666.8
300.1 5817.0 72141.0
30.1 459.2 13648.6
36.5 838.2 16486.1
15.3 44.2 3449.3
371.5 449.5 15264.4
3.8 21.4 321.0
30.4 297.6 2289.7
60.3 402.5 10211.0
13.6
4.2 381.3
23.2 1521.4 11110.3
40.7 77.4 17689.6
107.2 105.3 3267.1
6.8 30.4 630.5
4.7 39.5 654.4
13.9 136.8 3014.2
9.5 79.1 1984.0
11.2 66.4 5421.3
87.2 156.0 35594.4
373.7 9009.1 43178.9
20.6 18.8 5087.4
9.5 206.7 3051.0
42.8 269.1 3648.7
331.8 9800.3 73937.5
845.0 5826.8 179717.6
7.1
3.1 382.1
224.9 722.2 20933.4
12.8 213.6 7219.1
100.7 1196.0 37328.6
330.0 2231.1 83779.5
35.6 712.4 15201.7
2.1
5.9 920.9
35.7 449.6 11518.7
35.7 457.6 11518.7
94.7 1707.8 52348.6
409.9 12802.1 67.6 45.4
101.9 6623.9 11.6 2663.4 59.6 0.3 13.7 3.1 588.5
7.2 25.6
449.7
0.6 543.2
355.4
4.6
0.3
5.9
80.7
0.6 19.3
21.4
41.9 242.8
8.1 1085.2
5.5 36.5
60.6
864.4
64.1 1357.1
84.3 3119.6
12.5
2.4
27.2 82.3
0.1
5.4
4.6 302.1
35.7 4086.4
610.8
4.9
18.6 117.4
18.6 117.4
29.8 626.1
93.9 27829.9 274074.3 4.7 1128.8 19966.4
49.3 5958.6 216221.1 3.7 3835.4 85523.8 641.9 15279.1 415.7 17999.5 182.3 3774.5 4.7 7823.0 30760.3 13.2 379.7 951.2 3692.8 0.6 859.4 11809.3 74.2 838.1 1.7 507.1 13680.3 0.7 180.9 56922.9 1.9 2018.6 6307.6 65.5 769.7 91.2 826.5 170.6 3469.3 190.7 2305.0 1.1 423.4 21408.8 7.6 2063.8 40771.0 4013.3 59250.1 0.6 1392.9 11432.9 232.7 3575.9 657.8 5574.1 4312.7 134364.5 11762.0 208501.8 292.4 984.2 0.0 993.6 23940.1 208.0 7685.7 2.0 2087.8 44593.25 5.2 5381.3 97020.8 1.6 703.5 17630.4 55.5 1046.2 2.1 744.0 13533.5 2.1 745.0 13552.1 2.1 1597.1 57697.3
2.39 3.48 2.40 4.16 4.31 4.17 2.94 0.67 0.71 1.20 2.38 0.42 4.63 15.03 0.52 0.89 0.84 1.80 1.31 7.39 2.88 2.09 4.12 3.17 1.87 3.91 3.13 0.73 2.76 4.74 3.76 3.24 3.04 2.49 2.44 2.43 2.96
55
Georgia Environmental Protection Division Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Name
Table 20. Sediment Load Allocations (Impaired) Sediment Load (tons/yr)
June 2001
Open Water Low Intensity Residential High Intensity Residential High Intensity Commercial/ Industrial Transportatio n Bare Rock Sand and Clay Quarries Strip Mines Gravel Pits Transitional Deciduous Forest Evergreen Forest Mixed Forest Pasture/Hay Row Crops Other Grasses (Urban Recreational) Woody Wetland Emergent Herbaceous Wetlands Road Total load (tons/acre/yr)
Bay Creek Big Sandy Creek Browns Branch Butlers Creek Cabin Creek - upper Cabin Creek - middle Cabin Creek -lower Calaparchee Creek Cole Creek Eightmile Creek Gladesville Creek Hansford Branch Harmon Pye Branch Hartley Branch Herds Creek at CR 159 Little Chehaw Creek Little Deer Creek trib Little Deer Creek U/S Little Deer Creek D/S Little Shellstone Creek Long Branch Malholms Creek Mill Dam Creek Phinazee Creek Red Creek Rock Creek Rocky Creek - Jasper Rocky Creek - Butts Rocky Creek - Bibb Rocky Creek - Monroe Rum Creek Sand Branch Scoggins Creek Shellstone Creek Third Branch Tobesofkee Creek Trib Tobesofkee Creek U/S Tobesofkee Creek D/S Tobesofkee Creek Tobler Creek Town Branch U/S Town Branch D/S Town Branch - Rum Town Branch - Rum Walnut Creek Walnut Creek - upper Walnut Creek -lower White Creek Wise Creek
224.7 11.8 18.0
0.0
0.7
0.0 31.6
0.1
1.5
0.0
1269.0 31.8 39.6
0.0 2590.3 73.9 52.0
0.0 3495.3 103.2 86.9
0.0 86.3
25.8
0.0
0.4
0.0
1.7
0.1
0.0
3.1
0.0
2.3
0.0
9.0
0.0 40.4
0.0
0.0
0.0
0.0
0.7 12.0
0.0
3.8
1.5
1.3
0.0
7.1
0.0
7.4
0.0
9.7
6.7
0.0
0.4
0.0
2.2
1.4
0.0
2.2
1.4 34.0
0.0
0.0
0.9
0.8
0.0
2.5
2.4
0.0
3.6
0.5
0.0
0.0
12.1
0.0 622.3 21.0 85.6
0.0
0.0
3.7
0.0
0.2
0.0
2.7
51.0
3.5
4.4
0.0 401.4 27.8 12.0
0.0 454.7 31.3 16.6
0.0 465.7 31.4 26.5
0.0 227.0
6.7
0.0 247.5
9.1 13.0
0.0 247.5
9.1 13.0
0.0 448.4 18.6 72.2
0.0 448.4 18.6 72.2
0.0
2.3
0.7 12.0
0.0 50.1
0.1
0.0 710.3 16.4 19.7
0.0
1.3
0.0
3.1
5.9
Georgia Environmental Protection Division Atlanta, Georgia
0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 38137.7 0.0 38137.7 0.0 38137.7
341.9 0.0 6617.3
750.2 0.0
0.0
0.0 0.0 0.0
3.0
19.5
22.4
7.3
7.3 131.2
21.2 26.7 11.6 12.1 14.6
3.6 32.6
45.5 119.9
10.7
3.4 18.1
0.0 47.2
138.9 259.9
13.0
0.1 74.5 117.0
0.0
0.0 131.2
26.1 171.4
0.3 27.1
0.6 41.6 27.0 62.6 13.1 29.9 129.8 30.1 13.7 10.5 93.9 17.6 101.8 190.7 220.7 39.1 26.2 134.5 212.9
3.0 78.6 18.7 24.8 41.7 424.6
9.7 17.4 61.6 45.3 74.1 169.7 14.4 85.3 295.1 58.3
8.8 5.9 19.6 294.2 217.4 9.5 10.7 11.2 11.7 190.7 95.7 311.3 29.8 250.0
0.3 33.4 15.0 112.0
8.0 27.0 74.9
6.9 2.8 3.6 60.1 5.8 46.2 107.0 152.8 25.4 20.6 96.7 152.5 0.9 46.7 11.2 21.7 11.2 233.0 5.5 7.9 21.0 23.0 24.2 72.4 14.2 47.5 106.6 37.9 2.4 8.0 11.5 134.2 202.1 5.5 5.5 3.9 4.0 107.0 85.6 255.0 29.1 159.7
0.2 36.0 26.0 16.2 15.7 41.2 117.4
6.9 6.4 3.1 48.7 5.1 39.1 45.7 90.3 10.5 5.1 40.4 62.0 0.5 34.7 16.6 9.0 17.1 281.9 2.4 5.4 19.5 28.0 47.8 48.5 9.0 25.1 47.5 37.8 6.1 9.4 17.6 180.5 59.3 7.1 7.7 6.9 7.5 45.7 27.5 92.6 25.5 127.1
107.4 3363.3 284.7 7214.5 381.9 15027.7
4.4 2.2 985.6 65.9 3388.2 783.3 20127.6 54.6 11908.8 83.7 2612.6 24.3 361.8 101.5 2512.2 6.4 80.0 6.7 1008.5 1114.7 14459.2 455.6 4519.3 317.8 10905.0 6.3 6662.4 76.7 17084.1 84.9 19960.9
1144.9 0.6 2137.8 177.8 6290.7 39.1 1406.7 194.8 1577.4 7582.1 34151.6 12.9 5421.3 71.6 1072.5 92.0 1003.2 33.6 6418.1 1225.6 6156.8 309.3 14799.9 1.9 196.0 13.1 77.2 72044.4 0.8 61.1 62.4 2490.9 22.3 1836.9 87.3 4929.2 7543.6 38975.4 10.1 12898.1 3.1 382.1 3.7 418.3 46.4 1351.2 47.4 1351.6 1114.7 14459.2 326.8 9918.2 2675.5 63018.6 641.5 1677.7 341.0 10237.8
2.4
8.4
5.5
3.4
2.2
3.2
34.5
77.8
131.8 12.0
8.3 16.9
0.2
47.0
3.1 90.3 0.0 246.7 0.4 24.8
0.4 0.1 529.0 0.6 650.2
17.7 0.4
4.1 33.0
143.5 0.9 658.9
7.9
14.1 28.7 120.2
0.3 25.8 296.7
4.6
2.3 1739.6
269.7
3.9
0.2
23.4 32.5
27.4 32.7
27.4 197.5
21.7
12.5
2.4
12.5
2.4
21.7 296.7
21.7 296.7
90.3
0.8 16.0
4.7 91.4
18.7
40.6
0.3 130.5 3871.0 465.3 8081.8 701.3 16217.8
0.9 632.2 851.1 417.3 2816.7 973.4 7319.7
2071.1 27133.2 0.4 434.3 12601.8
35.9 2755.7 75.5 480.5 1.8 552.5 3425.0 21.5 136.5 453.1 1668.9 163.9 16317.7 3.2 1766.9 7489.4 0.1 243.7 11635.4 24.2 44895.8 0.4 169.1 56287.8 0.7 260.0 59544.2 28.5 1199.1 307.1 2638.6 93.6 6662.2 57.7 1559.3 83.9 2118.6 2756.6 46589.1 0.2 80.5 12168.3
9.7 1186.3 310.0 1529.8 1.9 370.2 7091.0 726.9 8267.7 2.0 981.8 17482.2
24.0 259.5 0.9 1560.1 2625.6 0.7 793.3 75370.5
26.5 507.7 207.2 2840.8 293.2 2672.8 505.7 6133.5 2527.4 50478.3 1.4 1017.4 14778.3 292.4 984.2 0.0 294.4 1024.8 2.0 500.1 2779.1 2.0 500.2 2781.8 1636.0 17789.8 0.1 815.7 11362.6 2.7 3384.3 70753.8 481.1 2905.0 0.9 1670.9 12864.0
2.84 2.52 5.28 0.29 2.89 2.98 3.55 5.09 3.13 0.82 0.96 0.24 0.97 2.00 0.85 6.03 62.79 15.11 10.44 1.69 1.63 4.78 1.23 1.18 2.33 14.46 1.20 0.71 1.87 2.05 2.49 0.36 1.22 2.72 0.27 4.17 1.79 2.46 2.91 2.50 0.73 0.73 2.92 2.86 2.18 2.12 3.64 1.70 1.82
56
Total Maximum Daily Load Evaluation
Ocmulgee River Basin (Biota Impacted)
Wood Creek
0.0
0.9
45.0 16.7
4.2
4.1 1600.7 2417.9
June 2001
143.0 4232.6
3.58
57
Georgia Environmental Protection Division Atlanta, Georgia
Open Water Low Intensity Residential High Intensity Residential High Intensity Commercial/ industrial Transportation Bare Rock Sand and Clay Quarries Strip Mines Gravel Pits Transitional Deciduous Forest Evergreen Forest Mixed Forest Pasture/Hay Row Crops Other Grasses (Urban Recreational) Woody Wetland Emergent Herbaceous Wetlands Road
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Name
Table 21. Sediment Load Percentages (Unimpaired) Percent Total Sediment Load
June 2001
Alcovy River Beaverdam Creek Big Sandy Creek Buck Creek Chambliss Creek Deer Creek U/S Douglas Creek Falling Creek Herds Creek at CR 198 Herds Creek at GA 212 Kinnard Creek Lee Creek Little Buck Creek Little Deer Creek Little Falling Creek Long Branch Panther Creek Peeksville Creek Prairie Creek Rock Creek Rocky Creek - Bibb Rocky Creek - Monroe Sabbath Creek Swan Creek - U/S Swan Creek -D/S Tobesofkee Creek lower Towaliga River Town Branch U/S Troublesome Creek Tussahaw Creek Trib Tussahaw Creek upper Tussahaw Creek lower Yellow Creek Yellow Water Creek Trib Yellow Water Creek U/S Yellow Water Creek D/S Yellow Water Creek
0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
2.1% 7.5% 0.6% 0.1% 1.4% 0.0% 0.3% 0.3%
0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
0.0% 0.0%
0.2% 2.1% 0.0% 0.0% 0.0% 4.9% 0.1% 39.7% 0.0% 0.0% 1.3% 0.5% 25.1% 2.2% 0.1% 0.1% 0.2%
4.5% 4.1% 4.1% 1.6%
0.1% 0.0% 0.0% 0.2%
0.0%
0.2% 0.0% 1.8%
0.0% 0.0% 0.9% 0.0% 0.0% 0.0% 0.0% 0.1% 0.1% 0.1%
0.2% 0.3% 0.1% 0.0% 0.3% 0.2% 0.2% 0.0% 0.2% 0.0% 0.0%
0.0% 0.0%
0.2% 0.0% 0.1% 0.1% 0.0% 0.2% 0.1% 0.3% 0.0% 0.0% 0.1% 0.1% 1.3% 0.2% 0.0% 0.0% 0.0% 0.1% 0.2% 0.1% 0.1% 0.1%
0.0% 0.0%
0.0%
16.7% 1.8%
0.1% 0.4% 0.3% 0.0%
0.0% 11.6% 0.6%
0.0%
0.0% 0.0% 36.4%
0.0% 67.0% 0.0%
0.0% 0.3% 0.0%
0.0% 0.0%
0.0%
71.5% 0.6%
0.3% 0.3% 0.2% 0.4%
0.0% 31.0% 0.0% 1.9%
0.1% 0.1%
0.0% 0.0%
0.0%
7.4%
0.0%
0.9%
0.0% 0.0% 0.0%
0.5% 1.1% 0.8% 0.5% 0.7% 0.7% 1.0% 3.7% 4.2% 1.7% 1.4% 3.7% 0.3% 0.2% 3.8% 2.3% 1.2% 1.0% 0.4% 0.2% 0.5% 1.2% 0.2% 0.3% 1.0% 0.5% 0.5% 1.0% 0.8% 0.2% 0.3% 0.5% 0.8% 0.6% 0.4% 0.4% 0.3%
0.2% 0.3% 0.4% 0.2% 0.4% 0.3% 0.3% 4.1% 1.0% 1.4% 0.7% 3.4% 0.2% 0.2% 3.1% 1.4% 0.3% 0.5% 0.5% 0.2% 0.2% 0.5% 0.2% 0.1% 0.6% 0.3% 0.3% 0.6% 0.8% 0.1% 0.2% 0.4% 0.4% 0.2% 0.2% 0.2% 0.1%
0.2% 0.3% 0.5% 0.4% 0.2% 0.2% 0.4% 1.2% 1.0% 0.8% 0.5% 1.6% 0.2% 0.1% 1.7% 0.9% 0.6% 0.4% 0.4% 0.1% 0.2% 0.6% 0.2% 0.3% 0.8% 0.2% 0.4% 0.7% 0.9% 0.2% 0.2% 0.3% 0.2% 0.2% 0.3% 0.3% 0.2%
7.8% 0.1% 2.8% 6.8% 3.0% 4.7% 1.2% 1.5% 5.6% 8.1% 3.4% 0.5% 11.1% 0.1% 1.7% 4.0% 4.8% 3.9% 3.4% 0.3% 0.4% 15.2% 0.2% 5.8% 4.8% 7.3% 2.8% 0.3% 3.0% 2.8% 2.7% 2.3% 4.0% 0.6% 3.3% 3.4% 3.0%
57.1% 83.7% 86.8% 84.4% 89.3% 91.6% 91.4% 49.6% 84.6% 62.0% 86.5% 45.5% 81.2% 31.1% 51.8% 81.9% 79.2% 86.9% 86.1% 25.3% 87.3% 72.9% 44.5% 85.3% 65.5% 55.0% 86.2% 38.8% 87.4% 93.9% 83.7% 86.4% 86.2% 88.0% 85.1% 85.0% 90.7%
0.1% 0.3% 0.0% 0.0% 0.4% 0.0%
0.0%
4.7% 0.2% 3.1% 3.1%
0.4% 1.9%
0.2% 0.2%
0.0%
0.0%
0.0%
0.1% 0.0% 0.0%
0.0% 0.0% 1.3% 0.1% 0.0% 0.0% 0.0%
0.5% 0.1% 0.1% 0.1%
3.3% 1.0% 5.6% 0.6% 0.7% 2.3% 0.8% 0.1% 0.6% 1.8% 0.3% 1.7% 15.5% 1.0% 1.5% 0.2% 0.3% 0.1% 0.7% 4.2% 3.5%
0.9% 0.9% 1.1%
0.0% 0.0% 0.0% 0.0%
0.0%
0.0% 0.0% 0.0% 0.0%
0.0% 0.0% 0.0%
0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
10.2% 5.7% 2.8% 4.5% 4.2% 2.3% 4.8%
25.4% 3.5%
25.8% 7.3% 8.8% 3.7% 0.3%
32.0% 8.5%
11.0% 4.9% 8.3% 2.0% 5.1% 6.8%
12.2% 6.5%
11.8% 3.2% 5.6%
29.7% 4.2% 2.7% 4.7% 5.5% 4.0% 5.3% 5.5% 5.5% 2.8%
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Name
Table 21. Sediment Load Percentages (Impaired) Percent Total Sediment Load
June 2001
Open Water Low Intensity Residential High Intensity Residential High Intensity Commercial/ industrial Transportation Bare Rock Sand and Clay Quarries Strip Mines Gravel Pits Transitional Deciduous Forest Evergreen Forest Mixed Forest Pasture/Hay Row Crops Other Grasses (Urban Recreational) Woody Wetland Emergent Herbaceous Wetlands Road
Bay Creek Big Sandy Creek Browns Branch Butlers Creek Cabin Creek - upper Cabin Creek - middle Cabin Creek -lower Calaparchee Creek Cole Creek Eightmile Creek Gladesville Creek Hansford Branch Harmon Pye Branch Hartley Branch Herds Creek at CR 159 Little Chehaw Creek Little Deer Creek trib Little Deer Creek U/S Little Deer Creek D/S Little Shellstone Creek Long Branch Malholms Creek Mill Dam Creek Phinazee Creek Red Creek Rock Creek Rocky Creek - Jasper Rocky Creek - Butts Rocky Creek - Bibb Rocky Creek - Monroe Rum Creek Sand Branch Scoggins Creek Shellstone Creek Third Branch Tobesofkee Creek Trib Tobesofkee Creek U/S Tobesofkee Creek D/S Tobesofkee Creek Tobler Creek Town Branch U/S Town Branch D/S Town Branch - Rum Town Branch - Rum Walnut Creek Walnut Creek - upper Walnut Creek -lower
0.0% 0.0% 0.0%
0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
5.8%
0.2%
45.1% 35.4% 12.9%
0.7% 0.0% 0.3%
0.0% 0.0% 0.0%
0.2% 0.0% 0.1% 0.3%
0.0% 0.0%
0.0% 0.0%
0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
0.1%
0.1% 0.0%
0.1% 0.2% 0.1%
3.6%
0.0% 0.0% 0.0%
0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
0.0%
1.8% 15.0%
7.4% 0.9% 1.5% 25.1% 24.1% 16.1% 16.1% 0.0% 0.4% 1.0%
Georgia Environmental Protection Division Atlanta, Georgia
0.3% 0.0% 1.1% 1.0% 0.4%
0.0% 0.0%
0.0% 0.0%
0.1% 0.0%
0.0% 0.1%
0.0% 0.1% 1.0% 0.5% 0.1% 0.9% 0.9% 0.7% 0.7% 0.0% 0.0%
0.5% 0.0% 0.0%
1.4% 0.7% 0.3% 0.2%
0.0%
0.1% 0.1% 0.0% 0.0% 0.0% 0.0%
0.1% 0.0%
0.1%
0.1% 0.2% 0.0% 0.1% 0.5%
0.0% 0.5% 0.2% 0.4% 0.3% 0.1% 0.0% 1.3% 1.3% 2.6% 2.6% 0.1% 0.0% 0.0%
0.0%
0.0%
0.0% 0.0%
0.0% 0.0%
0.0% 0.0% 0.0% 0.0%
84.9% 67.8% 64.0%
0.7% 0.0% 54.4%
28.6% 0.0%
0.0%
0.0% 0.0%
0.1%
2.3%
0.2%
0.2%
0.4% 0.8% 0.3% 0.2% 0.0% 0.0% 0.0% 0.3% 1.2%
2.1% 0.3% 0.1%
0.2% 0.3% 0.0% 0.3%
5.3% 0.3% 2.6%
0.0% 0.1% 0.8%
0.0%
0.0% 0.7% 0.2% 0.2%
0.0% 0.5% 0.2% 7.4% 0.5% 0.4% 0.5% 0.2% 0.5% 2.2% 2.7% 12.9% 6.1% 1.2% 2.9% 0.3% 0.1% 0.2% 0.4% 0.3% 3.0% 0.3% 1.6% 2.0% 0.9% 0.1% 1.5% 4.0% 0.6% 0.9% 1.0% 5.5% 3.2% 0.4% 11.5% 0.3% 0.2% 0.3% 0.6% 1.5% 1.0% 1.0% 0.4% 0.4% 1.1% 0.8% 0.4%
0.0% 0.4% 0.1% 13.2% 0.3% 0.4% 0.3% 0.1% 0.1% 0.8% 1.8% 4.3% 2.8% 0.7% 2.0% 0.2% 0.0% 0.2% 0.3% 0.1% 1.8% 0.2% 1.4% 0.5% 0.5% 0.0% 0.7% 1.4% 0.3% 0.3% 0.4% 5.5% 1.8% 0.1% 7.5% 0.1% 0.3% 0.2% 0.3% 1.4% 0.6% 0.5% 0.1% 0.1% 0.6% 0.8% 0.4%
0.0% 0.4% 0.2% 1.9% 0.6% 0.6% 0.4% 0.1% 0.2% 0.6% 1.4% 3.7% 2.3% 0.3% 1.2% 0.1% 0.0% 0.1% 0.1% 0.0% 1.3% 0.2% 0.6% 0.8% 0.6% 0.0% 0.5% 1.3% 0.4% 0.6% 0.3% 3.5% 1.0% 0.1% 7.4% 0.2% 0.3% 0.3% 0.4% 0.4% 0.7% 0.7% 0.2% 0.3% 0.3% 0.2% 0.1%
2.8% 3.5% 2.4% 0.5% 0.1% 0.9% 2.9% 0.4% 3.0% 5.0% 3.0% 4.7% 0.4% 6.8% 6.1% 2.7% 0.0% 0.1% 0.1%
0.0% 2.7% 2.5% 9.2% 16.3% 0.1% 6.0% 6.0% 0.5% 14.8% 1.8% 0.7% 0.5% 0.1% 0.2% 2.2% 0.8% 1.4% 14.9% 0.1% 0.3% 0.4% 1.7% 1.7% 6.3% 2.9% 3.8%
86.9% 89.3% 92.7%
35.0% 46.3% 74.2% 94.5% 94.8% 75.3% 73.3% 58.6% 60.4% 88.6% 60.3% 93.7% 14.8% 30.4% 33.5% 95.5% 81.0% 94.4% 90.2% 74.5% 73.3% 44.6% 90.4% 65.6% 90.5% 74.5% 84.7% 75.5%
95.6% 12.0% 87.7% 68.7% 80.4% 77.2% 87.3% 38.8% 40.8% 48.6% 48.6% 81.3% 87.3% 89.1%
0.1%
0.0%
1.2% 1.1% 0.5% 0.1%
0.2% 0.1% 0.0% 0.4%
0.0% 0.1% 0.0%
1.4%
0.0% 0.0%
0.0% 0.0%
0.1%
0.2% 0.6% 3.3% 0.2% 0.0% 0.9% 1.1% 1.5% 0.0% 0.5%
0.0%
6.8% 1.4% 0.1%
0.4% 0.0% 0.1%
0.9% 1.7%
1.7%
0.0%
0.1% 0.9% 0.4% 0.1%
1.3% 1.2% 0.8% 0.8%
0.0% 0.0%
0.2% 2.3% 53.1% 0.0% 1.2% 0.5% 0.4% 0.1% 0.2% 0.2% 10.7% 10.7% 0.5% 0.1% 0.1%
0.0% 0.1%
0.0%
0.1%
0.0% 0.0% 0.0% 0.0%
0.0%
0.0% 0.0% 0.0% 0.0%
0.0% 0.0% 0.1% 0.1% 0.0% 0.0%
3.4% 5.8% 4.3% 74.3% 14.8% 13.3% 7.6% 3.4% 1.3% 15.7% 16.1% 15.8% 27.1% 1.0% 23.6% 2.1% 0.1% 0.3% 0.4% 2.4% 11.6% 1.4% 3.7% 4.0% 5.9% 0.7% 0.8% 20.3% 5.2% 8.8% 5.6% 9.2% 59.4% 1.1% 5.2% 7.3% 11.0% 8.2% 5.0% 6.9% 29.7% 28.7% 18.0% 18.0% 9.2% 7.2% 4.8%
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Wise Creek Wood Creek
0.0% 0.0%
0.0%
0.0% 0.0%
0.0%
0.2% 1.1%
1.9% 0.4%
1.2% 0.1%
1.0% 2.7% 79.6% 0.1% 37.8% 57.1%
0.3%
June 2001
0.0% 13.0% 3.4%
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June 2001
5.4 Margin of Safety
The MOS is a required component of TMDL development. There are two basic methods for incorporating the MOS: 1) Implicitly incorporate the MOS using conservative model assumptions to develop allocations; or 2) Explicitly specify a portion of the TMDL as the MOS and use the remainder for allocations. For this TMDL the MOS was implicitly incorporated in the use of conservative modeling assumptions.
Georgia Environmental Protection Division
Atlanta, Georgia
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6.0 RECOMMENDATIONS
6.1 Monitoring
Monitoring is conducted at a number of locations across the State each year. GAEPD has adopted a basin approach to water quality management; an approach that divides Georgia's major river basins into five groups. This approach provides for additional sampling work to be focused on one of the five basin groups each year. The Ocmulgee River Basin along with the Oconee and Altamaha River Basins were the basins of focused monitoring in 1999 and will again receive focused monitoring in 2004. One goal of the focused basin monitoring is to continue to monitor 303(d) listed waters. Therefore, additional monitoring of these streams will be initiated as appropriate during the next monitoring cycle to determine if there has been improvement in the biological communities.
6.2 Best Management Practices
Based on the findings of the source assessment, it was determined that most of the sediment found in the Oconee River Basin streams is due to past land use practices and is referred to as "legacy" sediment. Therefore, it is recommended that there be no net increase in sediment delivered to the impaired stream segments, so that these streams will recover over time.
The measurement of sediment delivered to a stream is difficult, if not impossible, to determine. Therefore, setting a numeric TMDL is would be ineffective given the difficulty in measuring it. In addition, changes in habitat and aquatic communities are usually slow to respond, which is why monitoring will continue according to the five-year monitoring cycle. Thus, this TMDL recommends that the implementation of Best Management Practices (BMPs) be monitored. The anticipated effects of BMPs will contribute to the improvement of stream habitats and water quality, and thus be an indirect TMDL.
Management practices recommended to maintain the average annual sediment loads at current levels include:
Compliance with NPDES permit limits and requirements Implementation of GFC Best Management Practices for forestry Adoption of NRCS Conservation Practices Adherence to the Mined Land Use Plan prepared as part of the Surface Mining Permit
Application Adoption of proper unpaved road maintenance practices Implementation of Erosion and Sedimentation Control Plans for land disturbing activities Mitigation and prevention of stream bank erosion due to increased streamflow and
velocities caused by urban runoff
6.2.1 Point Source Approaches
Point sources are defined as discharges of treated wastewater or storm water into rivers and streams at discrete locations. Treated wastewater tends to be discharged at relatively stable rates; whereas, storm water is discharged at irregular, intermittent rates, depending on precipitation and runoff. The NPDES permit program provides a basis for municipal, industrial
Georgia Environmental Protection Division
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and storm water permits, monitoring and compliance with limitations, and appropriate enforcement actions for violations.
In accordance with GAEPD rules and regulations, all NPDES dischargers in the watershed are required to meet their current NPDES permit limits. It is recommended that there be no authorized increase in the mass loading of sediment (TSS) above those in the current NPDES permits, in order to maintain the current sediment loads in the impaired streams. The removal of mined material involves water pumped from the mine pit, and mineral processing involves the disposal of process waters. These waters are treated through either sedimentation ponds or detention basins prior to being discharged to the stream and are regulated by NPDES permits. For mining facilities located within the impaired watersheds, it is recommended that monitoring frequencies be increased in order to better characterize the total annual sediment loads coming from these facilities.
Georgia EPD has developed a General Storm Water NPDES Permit for Construction Activities. The current permit is required for all construction sites disturbing five or more acres. In 2003, this permit will cover all construction sites disturbing one or more acres. All sites required to have this permit are authorized to discharge storm water associated with construction activity to the waters of the State in accordance with the limitations, monitoring requirements, and other conditions set forth in Parts I through VII of the Georgia Storm Water Permit. The permit requires all sites to have an Erosion and Sedimentation Control Plan; to implement, inspect and maintain BMPs; and to monitor storm water for turbidity. Georgia's General Storm Water Permit can be considered a water quality-based permit, in that the numeric limits in the permit, if met and enforced, will not cause a water quality problem.
It is recommended that construction sites within impaired watersheds located within 100 feet of the impaired stream, or its tributaries, use DIRT II techniques to model and manage storm water runoff from these sites. In addition, all construction sites will monitor their storm water runoff as required by the General Storm Water NPDES Permit for Construction Activities.
6.2.2 Nonpoint Source Land Use Approaches
The Georgia EPD is responsible for administering and enforcing laws to protect the waters of the State. EPD is the lead agency for implementing the State's Nonpoint Source Management Program. Regulatory responsibilities include establishing water quality standards and use classifications, assessing and reporting water quality conditions, issuing point source permits, issuing water withdrawal and ground water permits, and regulating land-disturbing activities. Georgia is working with local governments, agricultural, and forestry agencies such as the Natural Resources Conservation Service, the Georgia Soil and Water Conservation Commission, and the Georgia Forestry Commission to foster the implementation of best management practices that address nonpoint source pollution. In addition, public education efforts are being targeted to individual stakeholders to provide information regarding the use of best management practices to protect water quality. The following sections describe in more detail the specific measures to reduce nonpoint sources of sediment by land use type.
6.2.2.1 Forested Land
In 1978, EPD designated the Georgia Forestry Commission (GFC) to be the lead agency in managing and implementing the silvicultural portion of Georgia's Nonpoint Source Management
Georgia Environmental Protection Division
Atlanta, Georgia
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Program. The GFC is responsible for coordinating water quality issues with regard to forested land in Georgia. The GFC is basically responsible for:
Georgia Environmental Protection Division
Atlanta, Georgia
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June 2001
Developing Best Management Practices (BMPs) for the forestry industry, Educating the forestry community on BMPs, and Conducting site inspections for compliance with the established BMPs.
The GFC formed a Forestry Nonpoint Source Pollution Technical Task Force to assess the extent of water pollution caused by forestry practices, and develop recommendations to reduce or eliminate erosion and sedimentation. After a three-year field study, the task force developed a set of BMPs that address all aspects of silviculture including forest road construction, timber harvesting, site preparation, and forest regeneration. The task force recommended the BMPs be implemented through a voluntary program, exempt from permitting under the Georgia Erosion and Sedimentation Control Act, emphasizing educational and training programs instead. In 1997, the original BMP document was revised to incorporated the 1989 Wetland BMP manual developed by the Georgia Forestry Association. The current BMP manual, Georgia's Best Management Practices for Forestry, was developed and became effective January 1, 1999 (GAEPD, 1999).
It is the responsibility of the GFC to educate and inform the forest community (landowners, procurement and land management foresters, consulting foresters, loggers, site prep and tree planting contractors) on the importance of BMPs. The GFC statewide coordinator and the twelve district coordinators conduct the educational programs across the state. The district coordinators receive specialized training in erosion and sediment control, forest road layout and construction, stream habitat assessment, rapid bioassessment (macroinvertebrate) monitoring, wetland delineation, and fluvial geomorphology. The GFC has developed training videos, slide programs, tabletop exhibits, and BMP billboards that are displayed at wood yards across the State. For the benefit of private landowners selling timber, the GFC has developed a Sample Forest Products Sale Agreement, which includes fill in the blank spaces for specific BMP incorporation. Since December 1995, the GFC has been cooperating with the University of Georgia School of Forest Resources, the Georgia Forestry Association, and American Forest and Paper Association (AFPA) member companies in the ongoing education of loggers and timber buyers through the Sustainable Forestry Initiative (SFI) Master Timber Harvester program. This includes an intensive training session on the BMPs conducted by the GFC.
To determine if educational efforts have been successful and if the BMPs are effective at minimizing erosion and sedimentation, the GFC conducted BMP compliance surveys in 1991 and 1992. In 1998, another BMP survey was conducted using a newly developed and more rigorous protocol recommended by a Southern Group of State Foresters (SGSF) Task Force. The GFC sampled about 10 percent of the forestry operations that occur annually. The number of samples taken in each county was based on the volume of wood harvested as reported in the state's latest Product Drain Report. Sites were randomly selected to reflect various forest types (non-industrial private forest, forest industry, and publicly owned lands). The survey results show that of the number of acres evaluated, the number in BMP compliance for the most part was very good. In 1991, approximately 86 percent of the acres evaluated were in compliance. In 1992, the figure increased to 92 percent compliance and in 1998, compliance rose to 98 percent.
The GFC also investigates and mediates complaints or concerns involving forestry operations on behalf of the EPD and the Army Corps of Engineers (COE) when stream water quality and wetlands are involved, respectively. Complaints from citizens are common, particularly in counties growing in population where landowners are living close to commercial forestry operations. After notifying the forest owner, the GFC District Coordinator conducts a field inspection to determine if BMPs were followed, if the potential for water quality problems exists,
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and who is the responsible party. If the complaint is valid, GFC will work with the responsible party until the problem is corrected. However, the GFC has no regulatory authority. In situations where the GFC can not get satisfactory compliance, the case is turned over to Georgia EPD or COE for enforcement actions under the Georgia Water Quality Control Act or Section 404 of the Federal Clean Water Act.
It is recommended that the GFC continue to encourage BMP implementation, educational training programs, and site compliance surveys. The numbers of individuals trained and site compliance inspections should be recorded each year. In addition, the number of complaints received, the actions taken, and enforcement actions written should be recorded.
6.2.2.2 Agricultural Land
There are a number of agricultural organizations that work to support Georgia's more than 40,000 farmers. The following three organizations have primary responsibility for working with farmers to promote soil and water conservation:
The University of Georgia - Cooperative Extension Service Georgia Soil and Water Conservation Commission Natural Resources Conservation Service
The University of Georgia (UGA) has faculty, County Cooperative Extension Agents, and technical specialists who provide services in several key areas relating to agricultural impacts on water quality. These include classroom instruction, basic and applied research, consulting assistance, and information on nonpoint source water quality impacts.
The Georgia Soil and Water Conservation Commission (GSWCC) was created in 1937 by a Georgia Legislative Act. In 1977, Georgia EPD designated the GSWCC as the lead agency for agricultural Nonpoint Source Management in the State. The GSWCC develops nonpoint source management programs and conducts educational activities to promote conservation and protection of land and water devoted to agricultural uses. In September 1994, the GSWCC developed a BMP manual, Agricultural Best Management Practices for Protection Water Quality in Georgia, for the agricultural community (GSWCC, 1994).
The Natural Resources Conservation Service (NRCS) cooperates with Federal, State, and local governments to provide financial and technical assistance to farmers. NRCS develops standards and specifications for BMPs that are to be used to improve, protect, or maintain our State's natural resources. Practice standards establish the minimum level of acceptable quality for planning, designing, installing, operating, and maintaining BMPs. Practice specifications describe the technical details and workmanship required to install a BMP and the quality and extent of materials to be used in a BMP.
The NRCS provides Conservation Practice Standards and Job Sheets on their website (www.ga.nrcs.usda.gov/ga/gapas/FOTG/Section _4/). Some of these BMPs may be used for farming operations to reduce soil erosion. It is recommended that the agricultural communities with crop land close to impaired streams, and pasture land where grazing animals have access to the stream, investigate the various BMPs available to them in order to reduce soil erosion and bank collapse.
Georgia Environmental Protection Division
Atlanta, Georgia
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June 2001
The 1996 Farm Bill and PL83-566 Small Watershed Program provided new financial assistance programs to address high priority environmental protection goals. Some programs that specifically address erosion and sedimentation are:
The Environmental Quality Incentives Program Conservation Reserve Program Small Watershed Program
The Environmental Quality Incentives Program (EQIP) is a USDA cost-share program available to farmers to address natural resource problems. EQIP offers financial, educational, and technical assistance funding for installing BMPs that reduce soil erosion, improve water quality, or enhance wildlife habitats.
The Conservation Reserve Program (CRP) was originally designed to provide incentive and offer assistance to farmers to convert highly erodible and other environmentally sensitive land normally devoted to the crop production, to land with other long-term resource-conserving cover. CRP has been expanded to place eligible acreage into filter strips, riparian buffers, grassed waterways, or contour grass strips. Each of these practices helps to reduce erosion and sedimentation and improve water quality.
The Small Watershed Program provides financial and technical assistance funding for the installation of BMPs in watersheds less than 250,000 acres. This program is used to augment ongoing conservation programs where serious natural resource degradation has or is occurring. Agricultural water management, which included projects that reduce soil erosion and sedimentation and improve water quality, is one of the eligible purposes of this program. NRCS is authorized by Public Law 83-566 to conduct river basin surveys and investigations. The NRCS River Basin Planning Program is designed to collect data on natural resource conditions within river basins of focus. NRCS is providing technical assistance to the GSWCC and the Georgia Environmental Protection Division with the Georgia River Basin Planning Program. Planning activities associated with this program will describe conditions of the agricultural natural resource base once every five years.
Every five years by the USDA Natural Resources Conservation Service conducts the National Resources Inventory (NRI). The NRI is a statistically based sample of land use and natural resource conditions and trends and it covers non-federal land in the United States. The National Resources Inventory found the total wind and water erosion on cropland and Conservation Reserve Program land in Georgia declined 38 percent from 3.1 billion tons per year in 1982 to 1.9 billion tons in 1997 (USDA NRCS, 1998).
NRCS also provides a web-based database application (Performance and Results Measurement System, PRMS) so conservation partners and the public can gain fast and easy access to the accomplishments and the progress made toward strategies and performance goals. The web site is http://sugarberry.itc.nrcs.usda.gov/Netdynamics/deeds/index.html.
It is recommended that the GSWCC and the NRCS continue to encourage BMP implementation, education efforts, and river basin surveys with regard to River Basin Planning. The five year National Resources Inventory should be continued and GAEPD supports the PRMS website.
Georgia Environmental Protection Division
Atlanta, Georgia
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6.2.2.3 Mine Sites
Surface mining and mineral processing present two threats to surface waters. The first threat is the wastewater from mining and mineral processing operations. These discharges are considered point sources, and therefore, are regulated by NPDES permits and were discussed in Section 6.2.1 above. The second threat involves mine reclamation activities. Reclamation occurs throughout the mining operation. From the first cut to the last, overburden is moved twice. With each movement of the soil and rock debris, the overburden must be managed to prevent soil and mineral erosion. Until the mine is re-vegetated, and hence reclaimed, BMPs must be implemented to prevent nonpoint source pollution.
The Georgia Surface Mining Act of 1968 provides for the issuance of mining permits at the discretion of the Director of Georgia EPD. These permits are administered by the Land Protection Branch. The surface mining permit application must include a Mined Land Use Plan, reclamation strategies, and surety bond requirements to guarantee proper management and reclamation of surface mined areas. The Mined Land Use Plan specifies activities prior to, during, and following mining to dispose of refuse and control erosion and sedimentation. The reclamation strategy includes the use of operational BMPs and procedures. The BMPs used are drawn from the Manual for Erosion and Sedimentation Control in Georgia, Georgia's Best Management Practices for Forestry, and from other states. Thus, the issuance of a surface mining permit in effect addresses BMPs to control nonpoint source pollutants. The regional EPD offices monitor and inspect surface mining sites to assess permit compliance.
It is recommended that special attention be given to those facilities located in impaired watersheds. The implementation and maintenance of BMPs used to control erosion should be reviewed during the site inspections.
The Georgia Mining Association (GMA) is an informal trade association of the mining industry. It serves more than 200 members, 47 mining companies and over 150 associate companies. The association monitors legislative developments and coordinates industry response. It educates miners about laws and regulations that affect them and provides a forum for the exchange of ideas. Through its newsletters, seminars, workshops, and annual conventions, the Georgia Mining Association serves as a source for mining industry information. It has several committees, including the Environmental Committee that meet three to four times a year. The mining industry is conducting informal discussions on the potential of developing industry-wide standards for Best Management Practices to prevent and reduce nonpoint source pollution. If these standards are adopted, the mining industry would likely conduct demonstration projects to gauge the effectiveness of the BMPs.
6.2.2.4 Roads
Unpaved roads can be a major contributor of sediment to our waterways if not properly managed. The following guidance for the maintenance and service of unpaved roadways, drainage ditches, and culverts can be used to minimize roadway erosion. One publication that may include some additional guidance is Recommended Practices Manual, A Guideline for Maintenance and Service of Unpaved Roads (Choctawhatchee, et. al, 2000).
Disturbances to unpaved roadway surfaces and ditches, and poor road surface drainage, results in deterioration of the road surface. This leads to increased roadway erosion and thus stream sedimentation. Unpaved roads are typically maintained by blading and/or scraping of the roads
Georgia Environmental Protection Division
Atlanta, Georgia
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
to remove loose material. Proper, timely, and selective surface maintenance can prevent and minimize erosion of unpaved roadways. This in turn lengthens the life of the road and reduces maintenance costs. Roadway blading that occurs during periods when there is enough moisture content allows for immediate re-compaction. In addition, roadwork performed near streams or stream-crossings during "dry" months of the year can reduce the amount of sediment that enters a stream.
Roadside ditches convey storm water runoff to an outlet. A good drainage ditch is shaped and lined with appropriate vegetative or structural material. A well-vegetated ditch slows, controls and filters the storm water runoff, providing an opportunity for sediments to be removed from the runoff before it enters surface waters. Energy dissipating structures to reduce velocity, dissipate turbulence or flatten flow grades in ditches are often necessary. Efficient disposal of runoff from the road helps preserve the roadbed and banks. Properly installed "turn-outs" or intermittent discharge points help to maintain a stable velocity and proper flow capacity within the ditch by timely outleting water from them. This in turns alleviates roadway flooding, erosion, and maintenance problems. Properly placed "turn-outs" distribute roadway runoff and sediments over a larger vegetative filtering area, helping to reduce road side ditch maintenance to remove accumulated sediment.
Culverts are conduits used to convey water from one side of a road to another. Installation, modification, and/or improvements of culverts when streamflows and expected rainfall is low can reduce the amount of sediment that enters a stream. If the entire installation process, from beginning to end, can be completed before the next rainfall event stream sedimentation can be minimized. Diverting all existing or potential streamflows while the culvert is being installed can also help reduce or avoid sedimentation below the installation. The culvert design can have a significant impact on the biological community if the size and species of fish passing through it are not considered. Changes in water velocities and the creation of vertical barriers effect the biological communities.
6.2.2.5 Urban Development
The Erosion and Sedimentation Act, established in 1975, provides the mechanism for controlling erosion and sedimentation from land-disturbing activities. This Act establishes a permitting process for land-disturbing activities. Many local governments and counties have adapted erosion and sedimentation ordinances and have been given authority to issue and enforce permits for land-disturbing activities. Approximately 32 counties and 240 municipalities in Georgia have been certified as the local issuing authority. In areas where local governments have not been certified as an issuing authority, the Georgia EPD is responsible for permitting, inspecting, and enforcing the Erosion and Sedimentation Act.
To receive a land-disturbing permit, an applicant must submit an erosion and sedimentation control plan that incorporates specific conservation and engineering Best Management Practices. The Field Manual for Erosion and Sediment Control in Georgia developed by the State Soil and Water Conservation Commission may be used as a guide to develop erosion and sedimentation control plans (GSWCC, 1997).
Local governments, with oversight by the Georgia EPD, and the Soil and Water Conservation Districts, are primarily responsible for implementing the Erosion and Sedimentation Act. Reports of suspected violations are made to the agency that issued the permit. In cases with local issuing authority, if the violation continues, the compliant is referred to the appropriate Soil and Water Conservation District. If the situation remains unresolved, the compliant is then
Georgia Environmental Protection Division
Atlanta, Georgia
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
referred to Georgia EPD for enforcement action. Enforcement may include administrative orders, injunctions, and civil penalties. It is recommended that the local and state governments continue to work to implement the provisions of the revised January 2001 Erosion and Sedimentation Act across Georgia.
Storm water runoff from developed urban areas (post-construction) can also have an impact on the transport of sediment to and within streams. Urbanization increases imperviousness, resulting in an increase in the volume of runoff that enters the streams. In addition, the streamflow rates may increase significantly from pre-construction rates. These changes in the streamflow can result in stream bank erosion and stream bottom down cutting. It is recommended that local governments review and consider implementation of practices presented in the Land Development Provisions to Protect Georgia Water Quality (GAEPD, 1997).
6.3 Reasonable Assurance
Permitted discharges will be regulated through the NPDES permitting process described in this report. Georgia is working with local governments, agricultural, and forestry agencies, such as the Natural Resources Conservation Service, the Georgia Soil and Water Conservation Commission, and the Georgia Forestry Commission, to foster the implementation of best management practices to address nonpoint sources. In addition, public education efforts will be targeted to individual stakeholders to provide information regarding the use of best management practices to protect water quality.
6.4 Public Participation
A thirty-day public notice will be provided for this TMDL. During this time the availability of the TMDL will be public noticed, a copy of the TMDL will be provided as requested, and the public will be invited to provide comments on the TMDL.
Georgia Environmental Protection Division
Atlanta, Georgia
70
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
REFERENCES
June 2001
Choctawhatchee, Pea and Yellow Rivers Watershed Management Authority, 2000. Recommended Practices Manual, A Guideline for Maintenance and Service of Unpaved Roads, February 2000.
GAEPD, 1997. Land Development Provisions to Protect Georgia Water Quality, Georgia Department of Natural Resources, Environmental Protection Division, October 1997.
GAEPD, 1998-1999. Water Quality in Georgia, 1998-1999, Georgia Department of Natural Resource, Environmental Protection Division.
GAEPD, 1999. Georgia's Best Management Practices for Forestry, Georgia Department of Natural Resource, Georgia Forestry Commission, Georgia Forestry Association, January 1999.
GAEPD, 2000. Georgia Nonpoint Source Management Program FFY 2000 Update, Georgia Department of Natural Resource, Environmental Protection Division, Water Protection Branch, August 2000.
GAEPD, Rules for Surface Mining, 391-3-3, Georgia Department of Natural Resources, Environmental Protection Division.
GAEPD, Rules and Regulations For Water Quality Control, Chapter 391-3-6, July 2000, Georgia Department of Natural Resources, Environmental Protection Division.
GAEPD, Rules for Erosion and Sedimentation Control, Chapter 391-3-7, Revised January 2001, Georgia Department of Natural Resources, Environmental Protection Division.
GSWCC, 1994, Agricultural Best Management Practices for Protecting Water Quality in Georgia, September 1994.
GSWCC, 1997, Field Manual for Erosion and Sediment Control in Georgia, Georgia Soil and Water Conservation Commission, Athens Ga.
GAWDR, 2000, Draft Standard Operating Procedures for Conducting Biomonitoring on Fish Communities in the Piedmont Ecoregion of Georgia, Revised June 9, 2000, Georgia Department of Natural Resources, Wildlife Resources Division, Fisheries Section.
GAWPB, 2000, Draft Standard Operating Procedures Freshwater Macroinvertebrate Biological Assessment, 2000, Georgia Department of Natural Resources, Water Protection Branch.
Thomas, Michael T., 1997. Forest Statistics for Georgia.
USDA-NCRS, 1997. National Resources Inventory; USDA-NCRS Athens, Georgia
USEPA. 1991. Guidance for Water Quality based Decisions: The TMDL Process. U.S. Environmental Protection Agency, Office of Water, Washington, DC. EPA-440/4-91-001, April 1991.
Georgia Environmental Protection Division
Atlanta, Georgia
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
USEPA, 1998. Better Assessment Science Integrating Point and Nonpoint Sources (BASINS), Version 2.0 User's Manual, U.S. Environmental Protection Agency, Office of Water, Washington DC
USEPA, 1999a. 1999 Update of Ambient Water Quality Criteria, U.S. Environmental Protection Agency, Office of Water, Washington, DC, EPA-822-R-99-014, December 1999.
USEPA, 1999b. Protocol for Developing Sediment TMDLs, First Edition, U.S. Environmental Protection Agency, Office of Water, Washington, DC
USEPA, 2000. Watershed Characterization System - User's Manual, US. Environmental Protection Agency, Region IV, Atlanta, Georgia, 2000.
USEPA, 2001a. Watershed Characterization System (WCS) Data, Georgia, US. Tetra Tech, Environmental Protection Agency, Region IV, Atlanta, Georgia , Jan 31, 2001.
USEPA, 2001b. Total Maximum Daily Load (TMDL) Development for Sediment in the Chattooga River Watershed. April 2001.
Georgia Environmental Protection Division
Atlanta, Georgia
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Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
APPENDIX A
Total Maximum Daily Load Summary Memorandum
Georgia Environmental Protection Division Atlanta, Georgia
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Bay Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Peach/Houston
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070104
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Bay Creek Headwaters to Beaver Creek 9 miles 2.30 square miles Big Indian Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (not supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA):
100 tons/yr
Fort Valley WPCP
100 tons/yr
Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
3,871 tons/yr 3,740 tons/yr 131 tons yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
Georgia Environmental Protection Division Atlanta, Georgia
3,971 tons/yr
A- 1
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Big Sandy Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Butts
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Big Sandy Creek Upstream Indian Springs 8 miles 5.11 square miles Ocmulgee River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
8,082 tons/yr 7,617 tons/yr 465 tons yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
8,082 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 2
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Brown Branch
1. 303(d) Listed Waterbody Information
State: County:
Georgia Henry
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Brown Branch Headwaters (Locust Grove) to Wolf Creek 5 miles 5.00 square miles Wolf Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
16,218 tons/yr 15,517 tons/yr 701 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load):
16,218 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 3
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Butlers Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Jones
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Butlers Creek Tributary to Ocmulgee River 5 miles 4.62 square miles Ocmulgee River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
851 tons/yr
219 tons/yr 632 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
851 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 4
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Cabin Creek
1. 303(d) Listed Waterbody Information
State: County: Major River Basin: 8-Digit Hydrologic Unit Code(s):
Georgia Spalding/Butts Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Cabin Creek Headwaters (Griffin) to Towaliga River 16 miles 12.53 square miles Towaliga River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (not supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): 257 tons/yr
Griffin Cabin Creek WPCP
68 tons/yr
Spring Industries, Inc .
189 tons/yr
Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
27,133 tons/yr 25,062 tons/yr 2,071 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
Georgia Environmental Protection Division Atlanta, Georgia
27,390 tons/yr
A- 5
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Calaparchee Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Monroe/Bibb
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Calaparchee Creek Upstream Lake Wildwood 13 miles 4.14 square miles Rocky Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
12,602 tons/yr
12,168 tons/yr 434 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
12,602 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 6
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Cole Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Lamar/Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Cole Creek Tributary to Tobesofkee Creek 6 miles 1.51 square miles Tobesofkee Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
2,756 tons/yr 2,720 tons/yr 36 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
2,756 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 7
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Eightmile Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Eightmile Creek Tributary to Towaliga River 5 miles 1.01 square miles Towaliga River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
480 tons/yr 405 tons/yr 75 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
480 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 8
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Gladesville Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Jasper
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Gladesville Creek Headwaters to Little Falling Creek 9 miles 5.53 square miles Little Falling Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
3,425 tons/yr 2,873 tons/yr 552 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
3,425 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 9
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Hansford Branch
1. 303(d) Listed Waterbody Information
State: County:
Georgia Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Hansford Branch Monroe County 2 miles 0.97 square miles Standard Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
Margin of Safety (MOS):
137 tons/yr
115 tons/yr 22 tons/yr
implicit
Annual Average Sediment Load:
137 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 10
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Harmon Pye Branch
1. 303(d) Listed Waterbody Information
State: County:
Georgia Jasper
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Harmon Pye Branch Tributary to Wise Creek 1 miles 2.78 square miles Wise Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
1,669 tons/yr 1,216 tons/yr 453 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
1,669 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 11
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Hartley Branch
1. 303(d) Listed Waterbody Information
State: County:
Georgia Crawford
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Hartley Branch Tributary to Deep Creek 1 miles 4.29 square miles Deep Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
16,318 tons/yr 16,154 tons/yr 164 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
16,318 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 12
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Herds Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Jasper
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Herds Creek Downstream Ga. Hwy 212 to Ocmulgee River 6 miles 14.00 square miles Ocmulgee River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
7,489 tons/yr 5,722 tons/yr 1,767 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
7,489 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 13
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Little Chehaw Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Jones
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Little Chehaw Creek Headwaters to Chehaw Creek 3 miles 3.07 square miles Chehaw Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
11,635 tons/yr 11,391 tons/yr 244 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
11,635 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 14
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Little Deer Creek Tributary
1. 303(d) Listed Waterbody Information
State: County:
Georgia Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Little Deer Creek Tributary Headwaters to Little Deer Creek 1 mile 1.20 square miles Little Deer Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
44,896 tons/yr 44,872 tons/yr 24 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
44,896 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 15
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Little Deer Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Little Deer Creek Headwaters to Deer Creek 6 miles 9.22 square miles Deer Creek
Constituent(s) of Concern:
Sedime nt
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA):
40 tons/yr
Davidson Mineral Outfall 001
35 tons/yr
Davidson Mineral Outfall 002
3 tons/yr
DOT Rest Area #22/I-75
2 tons/yr
Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
59,544 tons/yr 59,284 tons/yr 260 tons/yr
Margin of Safety (MOS):
Georgia Environmental Protection Division Atlanta, Georgia
implicit
A- 16
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Annual Average Sediment Load:
59,584 tons/yr
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Little Shellstone Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Bleckley
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070104
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Little Shellstone Creek Bleckley County 4 miles 1.22 square miles Shellstone Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
1,199 tons/yr 1,170 tons/yr 29 tons/yr
Margin of Safety (MOS):
implicit
Georgia Environmental Protection Division Atlanta, Georgia
A- 17
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Annual Average Sediment Load:
1,199 tons/yr
June 2001
Georgia Environmental Protection Division Atlanta, Georgia
A- 18
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Long Branch
1. 303(d) Listed Waterbody Information
State: County:
Georgia Jasper
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Long Branch Tributary to Ocmulgee River 3 miles 2.62 square miles Ocmulgee River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
2,639 tons/yr 2,332 tons/yr 307 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
2,639 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 19
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Malholms Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Butts
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Malholms Creek Headwaters (Jenkinsburg) to Tussahaw Creek 6 mile 2.33 square miles Tussahaw Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
6,662 tons/yr 6,568 tons/yr 94 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
6,662 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 20
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Georgia Environmental Protection Division Atlanta, Georgia
A- 21
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Mill Dam Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Mill Dam Creek Monroe County 4 mile 2.12 square miles Standard Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
1,559 tons/yr 1,501 tons/yr 58 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
1,559 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 22
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Phinazee Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Lamar/Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Phinazee Creek Lamar/Monroe Counties 6 mile 2.87 square miles White Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
2,119 tons/yr 2,035 tons/yr 84 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
2,119 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 23
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Red Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Red Creek Headwaters to Rocky Creek 3 mile 12.39 square miles Rocky Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
Margin of Safety (MOS):
46,589 tons/yr 43,832 tons/yr 2,757 tons/yr
implicit
Annual Average Sediment Load:
46,589 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 24
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Rock Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Jones
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Rock Creek Upstream Lite-N-Tie Rd 1 mile 1.36 square miles Walnut Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
12,168 tons/yr 12,088 tons/yr 80 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
12,168 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 25
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Rocky Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Jasper
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Rocky Creek Jasper County 5 mile 1.60 square miles South River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
1,186 tons/yr 1,176 tons/yr 10 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
1,186 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 26
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Rocky Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Monroe/Butts
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Rocky Creek Upstream Big Sandy Creek 6 mile 3.44 square miles Big Sandy Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
1,530 tons/yr 1,220 tons/yr 310 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
1,530 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 27
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Rocky Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Rocky Creek Downstream English Rd (CR152) to Towaliga River 4 mile 6.60 square miles Towaliga River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
8,268 tons/yr 7,541 tons/yr 727 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
8,268 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 28
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Rocky Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Monroe/Bibb
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Rocky Creek Upstream Lake Wildwood 7 mile 6.23 square miles Lake Wildwood
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
7,091 tons/yr 6,721 tons/yr 370 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
7,091 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 29
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Rum Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Rum Creek Rum and Town Creeks, upstream Lake Juliette 6 mile 11.36 square miles Lake Juliette
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Forsyth Northeast WPCP Future Construction Sites
64 tons/yr 64 tons/yr
Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
17,482 tons/yr 16,500 tons/yr
982 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
Georgia Environmental Protection Division Atlanta, Georgia
17,546 tons/yr
A- 30
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Sand Branch
1. 303(d) Listed Waterbody Information
State: County:
Georgia Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Sand Branch Tributary to Towaliga River 2 mile 1.14 square miles Towaliga River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
260 tons/yr 236 tons/yr 24 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
260 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 31
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Scoggins Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Scoggins Creek Tributary to Ocmulgee River 2 mile 3.51 square miles Ocmulgee River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
2,626 tons/yr 1,066 tons/yr 1,560 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
2,626 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 32
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Shellstone Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Bleckley/Twiggs
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070104
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Shellstone Creek U.S. Hwy 23 to Ocmulgee River 8 mile 42.82 square miles Ocmulgee River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
75,371 tons/yr 74,578 tons/yr 793 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
75,371 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 33
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Third Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Jones
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Third Creek Tributary to Ocmulgee River 3 mile 3.17 square miles Ocmulgee River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
508 tons/yr
481 tons/yr 27 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
508 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 34
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Tributary to Tobesofkee Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Lamar
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Tributary to Tobesofkee Creek Barnesville 2 mile 1.13 square miles Tobesofkee Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA):
119 tons/yr
William Carter
119 tons/yr
Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
2,841 tons/yr 2,634 tons/yr 207 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
Georgia Environmental Protection Division Atlanta, Georgia
2,960 tons/yr
A- 35
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Tobesofkee Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Lamar/Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Tobesofkee Creek Barnesville to Cole Creek 8 mile 27.72 square miles Tobesofkee Creek to Ocmulgee River
June 2001
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): William Carter Barnesville WPCP Future Construction Sites
162 tons/yr 119 tons/yr 43 tons/yr
Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
50,478 tons/yr 47,951 tons/yr 2,527 tons/yr
Margin of Safety (MOS):
Georgia Environmental Protection Division Atlanta, Georgia
implicit
A- 36
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Annual Average Sediment Load:
50,640 tons/yr
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Tobler Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Tobler Creek Tributary to Ocmulgee River 6 mile 9.34 square miles Ocmulgee River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
Margin of Safety (MOS):
14,778 tons/yr 13,761 tons/yr 1,017 tons/yr
implicit
Georgia Environmental Protection Division Atlanta, Georgia
A- 37
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
Annual Average Sediment Load:
14,778 tons/yr
June 2001
Georgia Environmental Protection Division Atlanta, Georgia
A- 38
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Town Branch
1. 303(d) Listed Waterbody Information
State: County:
Georgia Butts
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location:
Stream Length: Watershed Area: Tributary to:
Town Branch Downstream Jackson Southside WPCP to Aboothlacoosta Creek 3 mile 2.32 square miles Aboothlacoosta Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (not supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
Margin of Safety (MOS):
1,025 tons/yr
731 tons/yr 294 tons/yr
implicit
Annual Average Sediment Load:
Georgia Environmental Protection Division Atlanta, Georgia
1,036 tons/yr
A- 39
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Walnut Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Crawford
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Walnut Creek Downstream Hwy 42 4 mile 12.99 square miles Echeconnee Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
Margin of Safety (MOS):
17,790 tons/yr implicit
16,154 tons/yr 1,636 tons/yr
Annual Average Sediment Load:
17,790 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 40
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Walnut Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Jones/Bibb
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Walnut Creek Headwaters to Ocmulgee River 20 mile 31.01 square miles Ocmulgee River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (not supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
Margin of Safety (MOS):
70,754 tons/yr implicit
67,370 tons/yr 3,384 tons/yr
Annual Average Sediment Load:
70,754 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 41
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
White Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Lamar/Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
White Creek Lamar/Monroe Counties 4 mile 2.81 square miles Red Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
Margin of Safety (MOS):
2,905 tons/yr implicit
2,424 tons/yr 481 tons/yr
Annual Average Sediment Load:
2,905 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 42
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Wise Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Lamar
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Wise Creek Headwaters to Ocmulgee River 6 mile 11.31 square miles Ocmulgee River
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (not supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
12,864 tons/yr 11,193 tons/yr 1,671 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
12,864 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 43
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
SUMMARY MEMORANDUM Total Maximum Daily Load (TMDL)
Wood Creek
1. 303(d) Listed Waterbody Information
State: County:
Georgia Lamar/Monroe
Major River Basin: 8-Digit Hydrologic Unit Code(s):
Ocmulgee 03070103
Waterbody Name: Location: Stream Length: Watershed Area: Tributary to:
Wood Creek Headwaters to downstream Ga Hwy 83 3 mile 1.96 square miles Echeconnee Creek
Constituent(s) of Concern:
Sediment
Designated Use:
Fishing (partially supporting designated use)
Applicable Water Quality Standard: The purposes and intent of the State in establishing Water Quality Standards are to provide enhancement of water quality and prevention of pollution; to protect the public health or welfare in accordance with the public interest for drinking water supplies, conservation of fish, wildlife and other beneficial aquatic life, and agricultural, industrial, recreational, and other reasonable and necessary uses and to maintain and improve the biological integrity of the waters of the State.
2. TMDL Development
Analysis/Modeling: Universal Soil Loss Equation was used to determine the average annual sediment load
3. Allocation Watershed/Stream Reach:
Wasteload Allocations (WLA): Future Construction Sites Meet requirements of General Storm Water Permit
Load Allocation (LA): Land Use Road
4,233 tons/yr 4,090 tons/yr 143 tons/yr
Margin of Safety (MOS):
implicit
Annual Average Sediment Load:
4,233 tons/yr
Georgia Environmental Protection Division Atlanta, Georgia
A- 44
Total Maximum Daily Load Evaluation Ocmulgee River Basin (Biota Impacted)
June 2001
Georgia Environmental Protection Division Atlanta, Georgia
A- 45