Draft proposed total maximum daily loads (TMDLs) for fecal coliform in 303(d) listed streams in the Ocmulgee River basin

Metadata
Text

Collection:: Georgia Government Publications
Title:: Draft proposed total maximum daily loads (TMDLs) for fecal coliform in 303(d) listed streams in the Ocmulgee River basin
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 O27
Metadata URL:: https://dlg.galileo.usg.edu/id:dlg_ggpd_s-ga-bn200-pe5-bm1-b2001-bo27-belec-p-btext
Digital Object URL:: https://dlg.galileo.usg.edu/do:dlg_ggpd_s-ga-bn200-pe5-bm1-b2001-bo27-belec-p-btext
Extent:: 172 p.
Holding Institution:: University of Georgia. Map and Government Information Library
Rights:

PROPOSED TOTAL MAXIMUM DAILY LOADs (TMDLs)
For
Fecal Coliform
In
303(d) Listed Streams in The Ocmulgee River Basin
Cobbs Creek - (Headwaters to Shoal Creek) Conley Creek - (Headwaters to South River) Doless Creek - (Headwaters to Doolittle Creek) Doolittle Creek - (Headwaters to South River) Honey Creek - (Headwaters to South River) Intrenchment Creek - (Headwaters to South River) McClain Branch - (Headwaters to Honey Creek) North Branch South River - (Atlanta) Shoal Creek - (Headwaters to South River) Snapfinger Creek - (Dekalb County) Sugar Creek - (U/s Memorial Drive to South River)
DRAFT
Submitted to: U.S. Environmental Protection Agency, Region 4
Prepared by: Georgia Department of Natural Resources
Environmental Protection Division Atlanta, Georgia June, 2001

TABLE OF CONTENTS
1.0 INTRODUCTION..............................................................................................................................................................1
2.0 WATERSHED DESCRIPTION ......................................................................................................................................1
3.0 PROBLEM DEFINITION.................................................................................................................................................2
4.0 TARGET IDENTIFICATION...........................................................................................................................................2
5.0 WATER QUALITY ASSESSMENT AND DEVIATION FROM TARGET..............................................................3
6.0 SOURCE ASSESSMENT .......................................................................................................................................................4 6.1 Point Sources ................................................................................................................................................................ 4 6.2 Nonpoint Source Assessment.................................................................................................................................... 5
7.0 ANALYTICAL APPROACH.................................................................................................................................................7 7.1 Model Selection............................................................................................................................................................ 7 7.2 Model Set Up ................................................................................................................................................................ 7 7.3 Model Calibration......................................................................................................................................................... 8
8.0 DEVELOPMENT OF TOTAL MAXIMUM DAILY LOAD ...............................................................................................8 8.1 Critical Conditions........................................................................................................................................................ 9 8.2 Existing Conditions ...................................................................................................................................................... 9 8.3 Margin of Safety......................................................................................................................................................... 10 8.4 Determination of TMDL, WLAs, & LAs ................................................................................................................ 10
9.0 RECOMMENDATIONS........................................................................................................................................................12 9.1 Point Source Facilities................................................................................................................................................ 12 9.2 Urban Sources of Fecal Coliform Loading.............................................................................................................. 12 9.3 Agricultural Sources of Fecal Coliform Loading.................................................................................................... 13 9.4 Stream Monitoring...................................................................................................................................................... 13 9.5 Future Efforts .............................................................................................................................................................. 13
10.0 PUBLIC PARTICIPATION ...............................................................................................................................................13
REFERENCES ................................................................................................................................................................................13 FIGURES TABLES
APPENDIX A Water Quality Monitoring Data APPENDIX B Model Development and Calibration APPENDIX C Hydrology Calibrations APPENDIX D Simulation Period Hydrographs APPENDIX E Water Quality Calibrations APPENDIX F Simulated Fecal Coliform 30-Day Geometric Means for Existing and TMDL Conditions APPENDIX G Project Information for Watershed Models
i

ii

LIST OF FIGURES

Figure 1 Ocmulgee River Basin Figure 2 Location of South River Watershed, Upper Ocmulgee River Basin (Projects UPOCM01-
UPOCM05) Figure 3 Land Use Distribution, South River Watershed, Upper Ocmulgee River Basin (Projects
UPOCM01-UPOCM05) Figure 4A South River Watershed, Upper Ocmulgee River Basin (Projects UPOCM01-UPOCM05) Figure 4B South River Watershed, Upper Ocmulgee River Basin (Projects UPOCM01-UPOCM02) Figure 4C South River Watershed, Upper Ocmulgee River Basin (Projects UPOCM03-UPOCM05)
Figure B1 Location of Precipitation and Meteorological Stations Figure C1 Location of Hydrology Calibration and Validation Stations Figure C2 5.2-Year Calibration (Daily Flow) at 02204070 South River at Klondike Road Figure C3 5.2-Year Calibration (Monthly Average) at 02204070 South River at Klondike Road Figure C4 5.2-Year Calibration (Monthly Medians) at 02204070 South River at Klondike Road Figure C5 5.2-Year Calibration Statistics at 02204070 South River at Klondike Road Figure C6 Calendar Year 1999 (Daily Flow) at 022204070 South River at Klondike Road Figure C7 Calendar Year 1999 (Monthly and Weekly) at 022204070 South River at Klondike Road Figure C8 Calendar Year 1999 Statistics at 022204070 South River at Klondike Road Figure C9 10-Year Validation (Daily Flow) at 02219000 Apalachee River near Bostwick, GA Figure C10 10-Year Validation (Monthly Average) at 02219000 Apalachee River near Bostwick, GA Figure C11 10-Year Validation (Monthly Medians) at 02219000 Apalachee River near Bostwick, GA Figure C12 10-Year Validation Statistics at 02219000 Apalachee River near Bostwick, GA Figure C13 10-Year Validation (Daily Flow) at 02217500 Middle Oconee River near Athens, GA Figure C14 10-Year Validation (Monthly Average) at 02217500 Middle Oconee River near Athens, GA Figure C15 10-Year Validation (Monthly Medians) at 02217500 Middle Oconee River near Athens, GA Figure C16 10-Year Validation Statistics at 02217500 Middle Oconee River near Athens, GA Figure C17 10-Year Validation (Daily Flow) at 02220900 Little River near Eatonton, GA Figure C18 10-Year Validation (Monthly Average) at 02220900 Little River near Eatonton, GA Figure C19 10-Year Validation (Monthly Medians) at 02220900 Little River near Eatonton, GA
iii

Figure C20 10-Year Validation Statistics at 02220900 Little River near Eatonton, GA Figure C21 10-Year Validation (Daily Flow) at 02221525 Murder Creek below Eatonton, GA Figure C22 10-Year Validation (Monthly Average) at 02221525 Murder Creek below Eatonton, GA Figure C23 10-Year Validation (Monthly Medians) at 02221525 Murder Creek below Eatonton, GA Figure C24 10-Year Validation Statistics at 02221525 Murder Creek below Eatonton, GA Figure C25 10-Year Validation (Daily Flow) at 02208450 Alcovy River above Covington, GA Figure C26 10-Year Validation (Monthly Average) at 02208450 Alcovy River above Covington, GA Figure C27 10-Year Validation (Monthly Medians) at 02208450 Alcovy River above Covington, GA Figure C28 10-Year Validation Statistics at 02208450 Alcovy River above Covington, GA Figure C29 10-Year Validation (Daily Flow) at 02213000 Ocmulgee River at Macon, GA Figure C30 10-Year Validation (Monthly Average) at 02213000 Ocmulgee River at Macon, GA Figure C31 10-Year Validation (Monthly Medians) at 02213000 Ocmulgee River at Macon, GA Figure C32 10-Year Validation Statistics at 02213000 Ocmulgee River at Macon, GA Figure D1 Simulation Period Streamflow Hydrograph: Cobbs Creek Headwaters to Shoal Creek Figure D2 Simulation Period Streamflow Hydrograph: Conley Creek Headwaters to South River Figure D3 Simulation Period Streamflow Hydrograph: Doless Creek Headwaters to Doolittle Creek Figure D4 Simulation Period Streamflow Hydrograph: Doolittle Creek Headwaters to South River Figure D5 Simulation Period Streamflow Hydrograph: Honey Creek Headwaters to South River Figure D6 Simulation Period Streamflow Hydrograph: Intrenchment Creek Headwaters to South River Figure D7 Simulation Period Streamflow Hydrograph: McClain Branch Headwaters to Honey Creek Figure D8 Simulation Period Streamflow Hydrograph: North Branch South River Atlanta Figure D9 Simulation Period Streamflow Hydrograph: Shoal Creek Headwaters to South River Figure D10 Simulation Period Streamflow Hydrograph: Snapfinger Creek Dekalb County Figure D11 Simulation Period Streamflow Hydrograph: Sugar Creek U/s Memorial Drive to South River Figure E1 Water Quality Calibration: Cobbs Creek Headwaters to Shoal Creek Figure E2 Water Quality Calibration: Conley Creek Headwaters to South River Figure E3 Water Quality Calibration: Doless Creek Headwaters to Doolittle Creek Figure E4 Water Quality Calibration: Doolittle Creek Headwaters to South River Figure E5 Water Quality Calibration: Honey Creek Headwaters to South River Figure E6 Water Quality Calibration: Intrenchment Creek Headwaters to South River Figure E7 Water Quality Calibration: McClain Branch Headwaters to Honey Creek Figure E8 Water Quality Calibration: North Branch South River Atlanta Figure E9 Water Quality Calibration: Shoal Creek Headwaters to South River
iv

Figure E10 Water Quality Calibration: Snapfinger Creek Dekalb County

Figure E11 Water Quality Calibration: Sugar Creek U/s Memorial Drive to South River

Figure F1 Figure F2 Figure F3
Figure F4 Figure F5 Figure F6
Figure F7
Figure F8

Simulated Fecal Coliform 30-Day Geometric Mean: Cobbs Creek Headwaters to Shoal Creek Simulated Fecal Coliform 30-Day Geometric Mean: Conley Creek Headwaters to South River Simulated Fecal Coliform 30-Day Geometric Mean: Doless Creek Headwaters to Doolittle Creek Simulated Fecal Coliform 30-Day Geometric Mean: Doolittle Creek Headwaters to South River Simulated Fecal Coliform 30-Day Geometric Mean: Honey Creek Headwaters to South River Simulated Fecal Coliform 30-Day Geometric Mean: Intrenchment Creek Headwaters to South River Simulated Fecal Coliform 30-Day Geometric Mean: McClain Branch Headwaters to Honey Creek Simulated Fecal Coliform 30-Day Geometric Mean: North Branch South River Atlanta

Figure F9 Simulated Fecal Coliform 30-Day Geometric Mean: Shoal Creek Headwaters to South River Figure F10 Simulated Fecal Coliform 30-Day Geometric Mean: Snapfinger Creek Dekalb County

Figure F11 Simulated Fecal Coliform 30-Day Geometric Mean: Sugar Creek U/s Memorial Drive to South River

v

LIST OF TABLES
Table 1 Land Use Distribution for Ocmulgee River Basin Table 2 Waterbodies Listed for Fecal Coliform Bacteria in the Ocmulgee River Basin Table 3 1999 Water Quality Monitoring Stations Table 4 CY 1999 Water Quality Monitoring Data Table 5 NPDES Facilities Discharging Fecal Coliform in the Ocmulgee River Basin Table 6 Livestock Distribution In Ocmulgee River Basin Table 7 Estimated Number of Septic Systems In Ocmulgee River Basin Table 8 Loading Rates and Instream Fecal Coliform Concentrations for Existing Conditions During
Critical Period Table 9 TMDL Components Table 10 Load Allocations for Ocmulgee River Basin Table 11 Possible Load Reduction Scenarios for the Ocmulgee River Basin
Table A1 Water Quality Monitoring Data, Ocmulgee River Basin Table B1 Precipitation Stations and Associated Patching Stations Table B2 Meteorological Stations Used at Each Precipitation Station Table B3 Land Use Representation Table C1 Calibration and Validation Stationsfor Hydrological Parameters Above the GA Fall Line
(Piedmont)
vi

LIST OF ABBREVIATIONS
________________________________________________________________________________________

BMP CFS DEM DMR DNR DWPC EPA EPD GIS HSPF HUC LA MGD MOS MPN MRLC NPDES NPSM NRCS Rf3 RM STORET TMDL USGS WCS WLA

Best Management Practices Cubic Feet per Second Digital Elevation Model Discharge Monitoring Report Department of Natural Resources Division of Water Pollution Control Environmental Protection Agency Environmental Protection Division (State of Georgia) Geographic Information System Hydrological Simulation Program - FORTRAN Hydrologic Unit Code Load Allocation Million Gallons per Day Margin of Safety Most Probable Number Multi-Resolution Land Characteristic National Pollutant Discharge Elimination System Nonpoint Source Model Natural Resources Conservation Service Reach File 3 River Mile STORage RETrieval database Total Maximum Daily Load United States Geological Survey Watershed Characterization System Waste Load Allocation

vii

SUMMARY Proposed Total Maximum Daily Loads (TMDLs) 303(d) Listed Streams in Ocmulgee River Basin - HUC 03070103, HUC 03070104, and HUC 03070105

State:

Georgia

Counties: Gwinnett, DeKalb, Walton, Fulton, Clayton, Rockdale, Newton, Henry, Spalding, Butts, Jasper, Lamar, Upson, Monroe, Jones, Crawford, Bibb, Peach, Twiggs, Macon, Houston, Bleckley, Pulaski, Dodge, Dooly, Laurens, Wilcox, Wheeler, Telfair, Ben Hill, Coffee, and Jeff Davis.

Major River Basin: Ocmulgee River

Constituent(s) of Concern: Fecal Coliform Bacteria

Summary of 303(d) Listed Waterbody Information and Allocation by Stream Segment

Stream Name Alcovy River Alligator Creek Almand Branch

Segment Description
Cedar Creek to Bay Creek
Batson Creek to Lime Sink Creek Tanyard Branch to Snapping Shoals

Hydrologic Unit(s)
030701030704
030701050302 030701050301
030701030304

Use Classification
Fishing/ Drinking Water
Fishing
Fishing

Segment Length (miles)
4
12
5

Drainage
Area (miles 2)

Bay Creek

Headwaters to Beaver Creek

030701040202

Fishing

9

Beaver Ruin Creek

Gwinnett County

030701030401

Fishing

8

Big Cotton

Panther Creek to Brush Creek

030701030202

Fishing

5

Indian Creek

Big Flat Creek Headwaters to Flat Creek

030701030706

Fishing

13

WLA (#/30 days)

LA (#/30 days)

MOS
Implicit + 10%
Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit

TMDL (#/30 days)

viii

Stream Name
Big Haynes Creek Big Haynes Creek Big Haynes Creek Big Indian Creek Big Sandy Creek Bromolow Creek
Cabin Creek
Camp Creek

Segment Description
Brushy Creek to Little Panther Creek
Headwaters to Brushy Creek
Little Haynes Creek to Yellow River

Hydrologic Unit(s)

Use Classification

Segment Length (miles)

Drainage
Area (miles 2)

030701030505 Drinking Water

2

Fishing/

Drinking Water

9

Drinking Water

5

Mossy Creek to Ocmulgee River 030701040207

Fishing

7

Aboothlacoosta Creek to Ocmulgee River

030701031005

Fishing

10

Headwaters to Beaver Ruin

030701030401

Fishing

5

Creek

Headwaters Griffin to Towaliga 030701031104

Fishing

16

River

Headwaters to Jackson Creek

030701030403

Fishing

6

Cedar Creek

Headwaters to Alcovy River

030701030704

Fishing

4

Cobbs Creek

Headwaters to Shoal Creek

030701030103

Fishing

7

Conley Creek Headwaters to South River

030701030103

Fishing

9

Doless Creek Headwaters to Doolittle Creek 030701030102

Fishing

2

Doolittle Creek Headwaters to South River

030701030102

Fishing

5

Falling Creek

Little Falling Creek to Ocmulgee

River

030701031305

Fishing

9

Honey Creek Headwaters to South River

030701030106

Fishing

13

WLA (#/30 days)

LA (#/30 days)

MOS
Implicit + 10%
Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit

TMDL (#/30 days)

ix

Stream Name Segment Description Hopkins Creek Headwaters to Alcovy River

Hydrologic Unit(s)

Use Classification

Segment Length (miles)

Drainage
Area (miles 2)

030701030701

Fishing

4

House Creek

Ball Creek to Little House Creek 030701040603

Fishing

8

Intrenchment

Headwaters to South River

030701030102

Fishing

6

Creek

Jacks Creek

Headwaters to Yellow River

030701030406

Fishing

4

Jackson Creek Gwinnett County

030701030403

Fishing

7

Little Haynes

Hwy 20 to Big Haynes Creek

030701030504

Fishing

11

Creek

Little Stone

Mountain

Headwaters to Stone Mountain 030701030407

Fishing

3

Lake

Creek

Little Suwanee

Creek

Tributary to Yellow River

030701030404

Fishing

2

McClain

Headwaters to Honey Creek

030701030106

Fishing

2

Branch

No Business

Headwaters to Norris Lake

030701030501

Fishing

6

Creek

North Branch South River

Atlanta

030701030101

Fishing

3

Beaverdam Creek to Walnut Ocmulgee River
Creek

Fishing/

030701031602 Drinking Water

10

Ocmulgee River Sandy Run Creek to Big Indian 030701040107

Fishing

23

Creek

Tobesofkee Creek to Ocmulgee River Echeconnee Creek

030701031605

Fishing

7

Pew Creek

Gwinnett County

030701030405

Fishing

4

WLA (#/30 days)

LA (#/30 days)

MOS
Implicit + 10%
Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit
Implicit + 10%
Explicit
Implicit + 10%
Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit

TMDL (#/30 days)

x

Stream Name Rocky Creek Shetley Creek

Segment Description
1 mile u/s Rocky Creek Road to Tobesofkee Creek

Hydrologic Unit(s)

Use Classification

Segment Length (miles)

Drainage
Area (miles 2)

030701031406

Fishing

5

Headwaters to Bromolow Creek 030701030401

Fishing

2

Shoal Creek

Headwaters to Alcovy River

030701030701

Fishing

5

Shoal Creek

Headwaters to South River

030701030103

Fishing

7

Snapfinger Creek

Dekalb County

030701030104

Fishing

18

Snapping

Almand Branch to South River 030701030304

Fishing

10

Shoals Creek

030701030101

South River

Atlanta to Flakes Mill Road

030701030102

Fishing

16

030701030103

South River

Flakes Mill Road to Pole Bridge 030701030103

Creek

030701030105

Fishing

9

South River

Hwy 20 to Snapping Shoals

030701030301

Fishing

11

Creek

South River

Pole Bridge Creek to Hwy 20

030701030105

Fishing

15

030701030107

South River

Snapping Shoals to Jackson Lake

030701030305

Fishing

7

Stone Mountain

Headwaters to Stone Mountain 030701030407

Fishing

4

Creek

Lake

Sugar Creek

U/s Memorial Drive to South

030701030102

Fishing

6

River

Sweetwater Creek

030701030403 Lee Daniel Creek to Yellow River 030701030402

Fishing

6

WLA (#/30 days)

LA (#/30 days)

MOS
Implicit + 10%
Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit
Implicit + 10%
Explicit
Implicit + 10%
Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit
Implicit + 10%
Explicit
Implicit + 10%
Explicit Implicit +
10% Explicit

TMDL (#/30 days)

xi

Stream Name Segment Description

Hydrologic Unit(s)

Use Classification

Segment Length (miles)

Drainage
Area (miles 2)

Swift Creek

Headwaters to Yellow River

030701030501

Fishing

5

Tobesofkee Creek

Cole Creek to Todd Creek

030701031402 030701031401

Fishing

8

Tobesofkee

Lake Tobesofkee to Rocky

030701031406

Fishing

10

Creek

Creek

Town Branch

Downstream Jackson South

030701031004

Fishing

3

WPCP to Aboothlacoosta Creek

Turkey Creek

Headwaters to Yellow River

030701030406

Fishing

4

Turnpike Creek Hwy 280 to Sugar Creek

030701050403

Fishing

24

030701050402

Tussahaw

Wolf Creek to Lake Jackson

030701030903

Fishing

6

Creek

030701030902

Walnut Creek

Headwaters to Ocmulgee River

030701031604 030701031603

Fishing

20

Watson Creek Headwaters to Yellow River

030701030406

Fishing

3

Wise Creek Yellow River Yellow River Yellow River Yellow Water Creek Lake Jackson

Headwaters to Ocmulgee River 030701031003

Fishing

6

Big Haynes Creek to Jackson

030701030603

Fishing/

Lake

030701030601 Drinking Water

25

Hwy 124 to Big Haynes Creek

030701030501 Drinking Water

16

030701030502

Sweetwater Creek to Hwy 124

030701030406

Fishing

16

1 mile d/s Stark Road
Newton, Butts, and Jasper Counties

030701031001
030701030903 030701030305 030701030804

Fishing Recreation

7 N/A*

WLA (#/30 days)

LA (#/30 days)

MOS
Implicit + 10%
Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit Implicit +
10% Explicit
Implicit + 10%
Explicit

TMDL (#/30 days)

xii

*Affected area equals 650 acres Note: Current and future discharges shall be permitted at or below the water quality standard for fecal coliform bacteria of 200-counts/100 ml. Applicable Water Quality Standard for Drinking Water and Fishing use classifications:
Section 391-3-6-.03 (6) of the State of Georgia Rules and Regulations for Water Quality Control, Chapter 391-3-6 Revised, July, 2000: May through October - fecal coliform is not to exceed a geometric mean of 200 per 100 ml based on at least four samples collected from a given sampling site over a 30-day period at intervals not less than 24 hours. Should water quality and sanitary studies show fecal coliform levels from non-human sources exceed 200 per 100 ml (geometric mean) occasionally, then the allowable geometric mean fecal coliform shall not exceed 300 per 100 ml in lakes and reservoirs and 500 per 100 ml in free flowing freshwater streams. November through April - fecal coliform is not to exceed a geometric mean of 1,000 per 100 ml based on at least four samples collected from a given sampling site over a 30-day period at intervals not less than 24 hours and not to exceed a maximum of 4,000 per 100 ml for any sample. The geometric mean standard is the target value for the TMDLs Applicable Water Quality Standard for Recreation use classification: Section 391-3-6-.03 (6) of the State of Georgia Rules and Regulations for Water Quality Control, Chapter 391-3-6 Revised, July, 2000: Fecal coliform is not to exceed a geometric mean of 100 per 100 ml for coastal waters or 200 per 100 ml for all other recreational waters, based on at least four samples collected from a given sampling site over a 30-day period at intervals not less than 24 hours. Should water quality and sanitary studies show fecal coliform levels from non-human sources exceed 200 per 100 ml (geometric mean) occasionally, then the allowable geometric mean fecal coliform shall not exceed 300 per 100 ml in lakes and reservoirs and 500 per 100 ml in free flowing freshwater streams. TMDL Development - Analysis/Modeling: The Hydrologic Simulation Program Fortran (HSPF) watershed model was used to develop these TMDLs. An hourly time step was used to simulate hydrologic and water quality conditions with results expressed as daily averages. A simulation period of 6 years was used to assess the water quality standards for these TMDLs representing a range of hydrologic and meteorological conditions.
xiii

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page 1 of 14
PROPOSED FECAL COLIFORM TOTAL MAXIMUM DAILY LOADS (TMDLs)
for 303(d) listed stream segments in the OCMULGEE RIVER BASIN
1.0 INTRODUCTION
Section 303(d) of the Clean Water Act requires each state to list those waters within its boundaries for which technology based effluent limitations are not stringent enough to protect any water quality standard applicable to such waters. The TMDL process establishes the allowable loadings of pollutants or other quantifiable parameters for a waterbody based on the relationship between pollution sources and in-stream water quality conditions. This allows water quality based controls to be developed and implemented in an effort to reduce pollution, and restore and maintain compliance with water quality standards.
2.0 WATERSHED DESCRIPTION
The Ocmulgee River is located in Central Georgia (Figure 1), originating southeast of the City of Atlanta on the downstream side of Lake Jackson, where the South River (Figure 2), the Yellow River and the Alcovy River converge. The Ocmulgee River flows south and southeast for a distance of approximately 160 miles, until it joins the Oconee River near the City of Hazlehurst, to form the Altamaha River. The confluence of the Ocmulgee and Oconee Rivers form the Altamaha River, which continues in a southeaster direction to the Atlantic Ocean. The Ocmulgee River basin includes three United States Geologic Survey (USGS) eight-digit hydrologic units, HUC 03070103 (Upper Ocmulgee River watershed), HUC 03070104 (Lower Ocmulgee River watershed), and HUC 03070105 (Little Ocmulgee River watershed).
The Ocmulgee River basin falls within the Level III Piedmont (45) and Southeastern Plains (65) ecoregions. The Upper Ocmulgee River watershed is located in the Level IV Southern Outer Piedmont (45b) subecoregion. The Lower and Little Ocmulgee River watersheds are multifaceted watersheds with portions of the watersheds located in the Level IV Southern Outer Piedmont (45b), the Sand Hills (65c), the Coastal Plain Red Uplands(65k) and the Atlantic Southern Loam Plains (65l). There is also a corridor, running the length of the river and extending (approximately) one half to two miles inland on each side of the river, which lies in the Southeastern Floodplains and Low Terraces (65p) subecoregion. Typical characteristics for these subecoregions are as follows:
Southern Outer Piedmont (45b) - this region contains this region contains mostly rolling to hilly terrain with slightly lower elevations and less relief than 45a; mostly red clayey soils; southern most boundary occurs at the fall line; major forest type is loblolly short-leafed pine.
Sand Hills (65c) rolling to hilly, highly dissected coastal plain belt; generally low nutrient sand and clay soils.
Coastal Plain Red Uplands(65k) - this region contains mostly well drained soils composed of red sand and clay; the majority of the land is utilized as cropland or pasture.

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page 2 of 14
Atlantic Southern Loam Plains (65l) - this region contains soils ranging from poorly drained to excessively drained; longleaf pine, oak and some distinctive evergreen shrubs are common vegetation.
Southeastern Floodplains and Low Terraces (65p) this region contains large sluggish rivers and backwaters with ponds, swamps and oxbow lakes; terraces are typically covered by oak forests, while forests of bald cypress and water tupelo grow in the swamps and river areas.
The Ocmulgee River basin contains approximately 9,349 miles of Rf3 level streams and drains a total area of approximately 6,102 square miles. Watershed land use distribution is based on the Multi-Resolution Land Characteristic (MRLC) databases derived from Landsat Thematic Mapper digital images from the period 19901994. MRLC land use in the Ocmulgee River basin is summarized in Table 1. Figure 3 shows MRLC land use for the South River watershed, which contains all of the 303(d) listed segments for which a TMDL has been proposed in this report. Land use data in some portions of the Upper Ocmulgee watershed in proximity to the metropolitan Atlanta area was modified using a methodology developed by Aqua Terra, Inc. consultants. This methodology reclassified MRLC land use data for some forested areas from "forested" to "built up" based on an analysis of the degree or level of development adjacent to that particular area. This approach was demonstrated to produce a more accurate land use analysis when compared to data available for a limited number of areas where land use data was available that had been collected and compiled using more detailed and accurate methods than were used in developing the MRLC data. This adjustment was justifiable only for rapidly developing areas around metropolitan Atlanta where there was believed to be a large amount of (tree) canopied development occurring.
3.0 PROBLEM DEFINITION
EPA Region 4 approved Georgia's final 2000 303(d) list on August 28, 2000. This 303(d) list was then updated for the Altamaha, Ocmulgee, and Oconee River Basins and was finalized and approved by EPA Region 4 in June, 2001. The list identified the waterbodies for the Ocmulgee River basin shown in Table 2, as either not supporting or partially supporting designated use classifications, due to exceedence of water quality standards for fecal coliform bacteria. Fecal coliform bacteria are used as an indicator of the potential presence of pathogens in a stream. The objective of this study is to develop fecal coliform TMDLs for 303(d) listed waterbodies in the Ocmulgee River basin.
4.0 TARGET IDENTIFICATION
With one exception (Lake Jackson), all of the 303(d) listed waterbodies in the Ocmulgee River basin for which a fecal coliform TMDL is being developed has a designated use classification of either drinking water or fishing. The fecal coliform water quality criteria for protection of the drinking water and fishing use classification is established by the State of Georgia Rules and Regulations for Water Quality Control, Chapter 391-3-6 Revised, July, 2000, and will be used as the target level for fecal coliform TMDL development for all listed segments in the Ocmulgee River basin, with the exception of Lake Jackson.
Section 391-3-6-.03 (6) of the State of Georgia Rules and Regulations for Water Quality Control, Chapter 391-3-6 Revised, July, 2000, states that during the months of May through October, when water contact recreation activities are expected to occur, fecal coliform is not to exceed a geometric mean of 200 per 100 ml

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based on at least four samples collected from a given sampling site over a 30-day period at intervals not less than 24 hours. Should water quality and sanitary studies show fecal coliform levels from non-human sources exceed 200/100 ml (geometric mean) occasionally, then the allowable geometric mean fecal coliform shall not exceed 300 per 100 ml in lakes and reservoirs and 500 per 100 ml in free flowing freshwater streams. For the months of November through April, fecal coliform is not to exceed a geometric mean of 1,000 per 100 ml based on at least four samples collected from a given sampling site over a 30-day period at intervals not less than 24 hours and not to exceed a maximum of 4,000 per 100 ml for any sample. The geometric mean standard is the target for the TMDLs. An implicit and explicit MOS is applied to this standard during development of the TMDLs, as detailed in Section 8.3 of this report.
Lake Jackson is the only one of the 303(d) listed waterbodies in the Ocmulgee River basin which has a designated use classification of recreation. The fecal coliform water quality criteria for protection of the recreation use classification is also established by the State of Georgia Rules and Regulations for Water Quality Control, Chapter 391-3-6 Revised, July, 2000, and will be used as the target level for fecal coliform TMDL development for Lake Jackson.
Section 391-3-6-.03 (6) of the State of Georgia Rules and Regulations for Water Quality Control, Chapter 391-3-6 Revised, July, 2000, states that for recreational use waters, fecal coliform is not to exceed a geometric mean of 100 per 100 ml for coastal waters or 200 per 100 ml for all other recreational waters, based on at least four samples collected from a given sampling site over a 30-day period at intervals not less than 24 hours. Should water quality and sanitary studies show fecal coliform levels from non-human sources exceed 200 per 100 ml (geometric mean) occasionally, then the allowable geometric mean fecal coliform shall not exceed 300 per 100 ml in lakes and reservoirs and 500 per 100 ml in free flowing freshwater streams. The geometric mean standard is the target for the TMDLs. An implicit and explicit MOS is applied to this standard during development of the TMDLs, as detailed in Section 8.3 of this report.
5.0 WATER QUALITY ASSESSMENT AND DEVIATION FROM TARGET
Compliance with the applicable fecal coliform water quality criteria was assessed for each of the current 303(d) listed streams, based on monitoring data collected from the monitoring stations listed in Table 3.
Water quality data collected during calendar year 1999 for the current 303(d) listed stream segments, which met the regulatory criteria for calculation of a valid geometric mean, are summarized in Table 4. A geometric mean in excess of 200 counts per 100 milliliters during the period May October, or in excess of 1000 counts per 100 milliliters during the period November April, provides a basis for adding a stream segment to the 303(d) listing. A single sample in excess of 4000 counts per 100 milliliters can also provide a basis for adding a stream segment to the 303(d) listing. Stream segments that do not have 1999 monitoring data exceeding the above geometric mean or single sample criteria, were placed on the 303(d) as a result of data collected prior to 1999. All water quality data collected during calendar year 1999 for the current 303(d) listed stream segments in the Ocmulgee River basin, including data which did not meet the regulatory criteria for calculation of a valid geometric mean, are provided in Table A-1, in Appendix A of this report.

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6.0 SOURCE ASSESSMENT

An important part of the TMDL analysis is the identification of source categories, source subcategories, or individual sources of fecal coliform bacteria in the watershed and the amount of loading contributed by each of these sources. Sources are broadly classified as either point or non-point sources.

A point source can be defined as a discernable, confined, and discrete conveyance from which pollutants are or may be discharged to surface waters. Point source discharges of industrial wastewater and treated sanitary wastewater must be authorized by National Pollutant Discharge Elimination System (NPDES) permits. NPDES permitted facilities discharging treated sanitary wastewater are considered primary point sources of fecal coliform bacteria.

Non-point sources of fecal coliform bacteria are diffuse sources that cannot be identified as entering a waterbody through a discrete conveyance at a single location. These sources generally, but not always, involve accumulation of fecal coliform bacteria on land surfaces and washoff as a result of storm events. Typical nonpoint sources of fecal coliform bacteria include:

Wildlife Land application of agricultural manure Livestock grazing Leaking septic systems Urban development (including leaking sewer collection lines) Animals having access to streams

For nonpoint sources involving agricultural activites, the Natural Resources Conservation Service (NRCS) was consulted for information and parameters to be used to characterize agricultural activities represented in the water quality model.

6.1

Point Sources

There are a number of permitted point source discharges located in the drainage areas of the 303(d) listed stream segments. The average discharge flow and flow-weighted average fecal coliform loading for these facilities, as calculated from CY1999 Discharge Monitoring Report (DMR) data, are summarized in Table 5. Design flow, and fecal coliform loading based on monthly fecal coliform permit limits, are also provided in Table 5. A monthly average fecal coliform concentration of 200 counts per 100 milliliters was assumed for the purpose of calculating the flow-weighted average fecal coliform loading for facilities that did not have an existing fecal coliform permit limit, or for which no DMR data was available for the CY1999 period. Calibration of the water quality model was conducted using DMR data whenever available. In cases where no DMR data was available the fecal coliform loading rate was calculated using the design flow and assuming an average fecal coliform concentration equal to the lesser of 200 counts/ 100 ml and the existing fecal coliform permit limit.

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6.2

Nonpoint Source Assessment

6.2.1 Wildlife

Wildlife deposit feces onto land surfaces where it can be transported during storm events to nearby streams. In the water quality model, the wildlife fecal coliform contribution is accounted for in the deer population. The deer population is estimated to be 30 to 45 animals per square mile in this area (Georgia WRD, 1999). The upper limit of 45 deer per square mile has been chosen to account for deer and all other wildlife present in the watershed. It is assumed that the wildlife population remains constant throughout the year, and that wildlife is uniformly distributed on all land classified in the MRLC database as forest, pasture, cropland, and wetlands.

6.2.2 Agricultural Animals

Agricultural animals are also a potential source of several types of fecal coliform loading to streams in the Ocmulgee River basin.

As with wildlife, agricultural livestock grazing on pastureland or forestland deposit their feces onto land surfaces where it can be transported during storm events to nearby streams. Animal access to pasture land varies monthly, resulting in varying fecal coliform loading rates throughout the year. Beef cattle spend all of their time in pasture, while dairy cattle and hogs are confined periodically. All manure from beef cattle is therefore assumed applied to pastureland. The percentage of feces deposited during grazing time is used to estimate the fecal coliform loading rates from pastureland.

Confined livestock operations also generate manure, which can be applied to pastureland and cropland as a fertilizer. Processed agricultural manure from confined hog, dairy cattle, and some poultry operations is generally collected in lagoons and applied to land surfaces during the growing season, at rates which often vary on a monthly basis. It is a basic assumption that the manure is evenly distributed over the land surfaces to which it is applied. Assumptions regarding manure management practices for specific agricultural livestock operations are as follows:

Poultry litter is normally piled for a period before it is used for manure application. Within the

Ocmulgee River basin it is estimated that approximately 100 percent of poultry litter is applied to

pastureland, with only a negligible amount applied to cropland. It is assumed that the poultry litter

is applied primarily during the period between March and October (inclusive), and that application

rates vary monthly.

Within the Ocmulgee River basin it is estimated that approximately 100 percent of broiler litter is

applied to pastureland, with only a negligible amount applied to cropland. It is assumed that the

broiler litter is applied year-round, but at variable monthly rates.

Hog farms in the Ocmulgee River basin operate by confining the animals or allowing them to graze

in small pastures or pens. It is assumed that all of the hog manure produced by either farming

method is applied to available pastureland, with negligible amounts applied to cropland. Application

rates of hog manure to pastureland vary monthly according to management practices. Applications

are assumed to be made during the period between March and October (inclusive).

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On dairy farms, the cows are confined for a limited period each day during which time they are fed

and milked. This is estimated to be four hours per day for each dairy cow. It is assumed that 100

percent of manure collected during confinement is applied to the available pastureland in the

watershed. It is also assumed that the dairy cow manure is applied during the period between

February and October (inclusive), as well as in November. Application rates vary monthly according

to management practices.

All manure from beef cattle is assumed applied to pastureland. The beef cow manure is assumed

to be applied year-round, and at a constant monthly rate.

Imported manure is used both on cropland and pastureland at proportions of 75 percent and 25

percent, respectively. It is assumed that the imported manure is applied during the period between

February and October (inclusive), as well as in November. Application rates vary monthly.

Agricultural livestock and other unconfined animals (i.e., deer and other wildlife) also often have direct access to streams that pass through pastures, and as such can impact water quality in another manner. Feces deposited into these streams by grazing animals is included in the water quality model as a point source having constant flow and concentration. To calculate the amount of fecal coliform bacteria introduced into streams by cattle, it is assumed that only beef cow populations have access to the streams, and of those, approximately twelve percent will defecate in the stream (personal communication, EPA, Georgia Agribusiness Council, NRCS, University of Georgia, et. al.).

Livestock data for the listed streams in the Ocmulgee River basin are shown in Table 6. This data is based on the 1997 Census of Agriculture and is reported by county. The county data are assigned to the watersheds based on the percentage of agricultural area in each subwatershed classified as pasture/hay. Cattle numbers reported in the census data also represent other breeds of cattle and calves in addition to dairy and beef.

6.2.3 Leaking Septic Systems

Some fecal coliform loading in the Ocmulgee River basin may be attributed to failure of septic systems and illicit discharges of raw sewage. Estimates from county census data of people in each listed stream watershed utilizing septic systems are shown in Table 7. These estimates were updated based on a county-by-county survey conducted by EPD in April-May 2001. It is estimated that there are approximately 2.37 people per household on septic systems (EPA, personal communication). For modeling purposes, it is assumed that five percent of the septic systems in the watershed leak. Leaking septic systems are included in the water quality model as a point source having constant flow and concentration. The average fecal coliform concentration of the septic system wastewater reaching a stream was assumed to be 1 x 104 counts per 100 ml.

6.2.4 Urban Development

Fecal coliform loading from urban areas is potentially attributable to multiple sources including storm water runoff, leaks and overflows from sanitary sewer systems, illicit discharges of sanitary waste, runoff from improper disposal of waste materials, leaking septic systems, and domestic animals. Urban runoff and storm water processes are considered to be significant contributors to fecal coliform concentrations in some Ocmulgee River subwatersheds.

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To estimate the load of fecal coliform bacteria from leaking sewer collection lines, it was assumed that up to five percent of the permitted design flow of a municipal water pollution control plant (WPCP) was lost through leaks. The average fecal coliform bacteria concentration in the untreated wastewater was assumed to be 1 x 106 counts/100 ml (EPA, "Protocol for Developing Pathogen

7.0 ANALYTICAL APPROACH

Establishing the relationship between in-stream water quality and source loading is an important component of TMDL development. It allows the determination of the relative contribution of sources to total pollutant loading and the evaluation of potential changes to water quality resulting from implementation of various management options. This relationship can be developed using a variety of techniques ranging from qualitative assumptions based on scientific principles to numerical computer modeling. In this section, the numerical modeling techniques developed to simulate fecal coliform bacteria fate and transport in the watershed are discussed.

7.1

Model Selection

A dynamic computer model was selected for fecal coliform analysis in order to: a) simulate the time varying nature of fecal coliform deposition on land surfaces and transport to receiving waters; b) incorporate seasonal effects on the production and fate of fecal coliform bacteria; and c) identify the critical condition for the TMDL analysis. Several computer based tools were also utilized to generate input data for the model.

The Nonpoint Source Model (NPSM) is a watershed model capable of simulating nonpoint source runoff and associated pollutant loadings, account for point source discharges, and performing flow and water quality routing through stream reaches. NPSM is based on the Hydrologic Simulation Program - Fortran (HSPF). In these TMDLs, NPSM was used to simulate point source discharges, simulate the deposition and transport of fecal coliform bacteria from land surfaces, and compute the resulting water quality response.

In addition to NPSM, the Watershed Characterization System (WCS), a geographic information system (GIS) tool, was used to display, analyze, and compile available information to support water quality model simulations for the Ocmulgee River basin. This information includes land use categories, point source dischargers, soil types and characteristics, population data (human and livestock), and stream characteristics. Results of the WCS characterization are input to a spreadsheet developed by Tetra Tech, Inc. to estimate NPSM input parameters associated with fecal coliform buildup (loading rates) and washoff from land surfaces. In addition, the spreadsheet can be used to estimate direct sources of fecal coliform loading to water bodies from leaking septic systems and animals having access to streams. Information from the WCS and spreadsheet tools were used as initial input for variables in the NPSM model.

7.2

Model Set Up

The Ocmulgee River basin was delineated into 258 subwatersheds in order to characterize relative fecal coliform bacteria contributions from significant contributing drainage areas (see Figures 4A 4C).

Boundaries were constructed so that subwatershed "pour points" coincided, when possible, with water quality monitoring stations or USGS flow gages. Watershed delineation was based on the Reach File 3 (Rf3) stream coverage and Digital Elevation Model (DEM) data. This discretization allows management and load reduction alternatives to be varied by subwatershed.

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An important factor influencing model results is the precipitation data contained in the meteorological data file used in the simulation. The pattern and intensity of rainfall affects the build-up and wash-off of fecal coliform bacteria from the land into the streams, as well as the dilution potential of the stream. Precipitation data from the EarthInfo CD set were used for simulations in all subwatersheds. Details regarding the methods and data sets are presented in Appendix B.
7.3 Model Calibration
Calibration of the watershed model included both hydrology and water quality components. The hydrology calibration was performed first and involved adjustment of the model parameters used to represent the hydrologic cycle until acceptable agreement was achieved between simulated flows and historic stream flow data from a USGS stream gaging station in the watershed for the same period of time. Model parameters adjusted include: evapotranspiration, infiltration, upper and lower zone storage, groundwater storage, recession, losses to the deep groundwater system, and interflow discharge. Details of hydrologic calibrations are presented in Appendix B. Hydrology calibrations are presented in Appendix C, along with USGS gages used for the flow calibrations. Calibrated models were then subjected to model validation to ensure that generated model streamflows for each of the impaired segments were acceptable. Model generated hydrographs for each of the impaired streams are presented in Appendix D.
The model was also calibrated for water quality. Appropriate model parameters were adjusted to obtain acceptable agreement between simulated instream fecal coliform concentrations and observed data collected at the sampling stations indicated in Table 3. Details of water quality calibrations are presented in Appendix B. Water quality calibrations are presented in Appendix E.
8.0 DEVELOPMENT OF TOTAL MAXIMUM DAILY LOAD
The TMDL process quantifies the amount of a pollutant that can be assimilated in a waterbody, identifies sources of the pollutant, and recommends regulatory or other actions to be taken to achieve compliance with applicable water quality standards based on the relationship between pollution sources and in-stream water quality conditions. A TMDL can be expressed as the sum of all point source loads (Waste Load Allocations), nonpoint source loads (Load Allocations), and an appropriate margin of safety (MOS) which takes into account any uncertainty concerning the relationship between effluent limitations and water quality:
TMDL = WLAs + LAs + MOS
The objective of a TMDL is to allocate loads among known pollutant sources throughout a watershed so that appropriate control measures can be implemented and water quality standards achieved. 40 CFR 130.2 (i) states that TMDLs can be expressed in terms of mass per time (e.g. pounds per day), toxicity, or other appropriate measure. For fecal coliform bacteria, the TMDLs are expressed as counts per 30 days.

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8.1 Critical Conditions
The critical condition for nonpoint source fecal coliform loading is an extended dry period followed by a rainfall runoff event. During the dry weather period, fecal coliform bacteria builds up on the land surface, and is washed off by rainfall. The critical condition for point source loading occurs during periods of low stream flow when dilution is minimized. Both conditions are simulated in the water quality model.
A definitive time period was used to simulate a continuous 30-day geometric mean concentration to compare to the target. This time period contained a range of hydrological conditions that included both low and high stream flows from which critical conditions were identified and used to derive the TMDL values.
The simulated 30-day geometric mean concentrations for existing conditions are presented in Appendix F. From these figures, critical conditions can be determined. The 30-day critical period in the model is the period preceding the largest simulated violation of the geometric mean standard (EPA, 1991). During periods where the model predicted extremely low stream flows, the model often became unstable and exhibited extreme positive or negative spikes. These portions of the simulation were excluded from consideration of the critical period. Meeting water quality standards during this period ensures that water quality standards can be achieved throughout the reviewed time period. For the listed segments in the Ocmulgee River basin, the critical period used in development of the TMDLs is given in Table 8.
8.2 Existing Conditions
The existing fecal coliform load for each of the 303(d) listed waterbodies in the Ocmulgee River basin was determined in the following manner:
The calibrated model, corresponding to the portion of the Ocmulgee River basin that is upstream of the pour point of the listed waterbody segment was run for a time period that included the critical condition. This critical time period is provided for each listed segment in Table 8.
The existing fecal coliform load for each listed segment is represented as the sum of the NPDES permitted fecal coliform load from all point discharges (at design limits), the daily discharge load of other modeled direct sources (e.g. other direct sources such as animal access to streams, illicit discharges of fecal coliform bacteria, failing septic systems, or leaking sewer collection lines), and the daily fecal coliform load indirectly going to surface waters from all land uses (e.g. surface runoff), over the 30 day critical period. The existing loading rates given in Table 8 considers a die-off and absorption by soil for fecal coliform applied to land (during accumulation and before transported to the stream), but does not consider fecal coliform decay (die-off) during transport to the stream. The existing in-stream fecal coliform concentration given in Table 8, includes in-stream decay of the fecal coliform.
Model results indicate that nonpoint sources related to agricultural and urban land uses have the greatest impact on the fecal coliform bacteria loading in the Ocmulgee River basin. Direct inputs of fecal coliform bacteria from "other sources" (i.e., animal access to streams, illicit discharges of fecal coliform bacteria, failing septic systems, and leaking sewer collection lines) are also shown to increase bacteria loading in the watershed. Reductions in these loading rates reduce the in-stream fecal coliform bacteria levels. Non-point source loading rates and the in-stream geometric mean concentration representing existing conditions during the critical period are shown in Table 8.

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In general, point source loads from NPDES facilities do not significantly contribute to the impairment of the listed stream segments since discharges from these facilities are required to be treated to levels corresponding to instream water quality criteria. Table 5 provides point source loads from NPDES facilities for existing conditions based on DMRs, and loads for TMDL conditions based on permitted facility flows and limits. As shown in this table, most facilities for which data is available have existing (i.e. based on DMR reporting) loads that are significantly lower than the maximum load at the permit limits.

8.3

Margin of Safety

There are two methods for incorporating an MOS in the analysis: a) implicitly incorporate the MOS using conservative model assumptions to develop allocations; or b) explicitly specify a portion of the TMDL as the MOS and use the remainder for allocations. In these TMDLs, an implicit MOS was incorporated through the use of conservative modeling assumptions and a continuous simulation that incorporates a range of meteorological events. Conservative modeling assumptions used include: septic systems discharging directly into the streams; development of the TMDL using loads based on the design flow and fecal coliform permit limits of NPDES facilities; and all land uses connected directly to streams. An explicit MOS of 10% was also included in the TMDLs by requiring the simulated geometric mean concentration to be 180 counts / 100 ml, rather than the standard of 200 counts / 100 ml.

8.4 Determination of TMDL, WLA, and LA

The TMDL is the total amount of pollutant that can be assimilated by a water body while maintaining water quality standards. Fecal coliform bacteria TMDLs are expressed as counts per 30-day period since this is how the water quality standard is expressed. The TMDL, therefore, represents the maximum fecal coliform bacteria load that can be assimilated by a stream during the critical 30-day period while maintaining the fecal coliform bacteria water quality standard of 200 counts / 100 ml. As previously stated, the TMDL is calculated using the equation:

TMDL = WLAs + LAs + MOS

With MOS = 20 counts / 100 ml (i.e. a 10% explicit MOS), the TMDL, WLA, and LA were determined according to the following procedure:

The calibrated model, corresponding to the portion of the watershed that is upstream of the pour point of the listed waterbody segment was run for a time period that included the critical condition as specified in Table 8.

Existing NPDES permitted facilities and any known future facility discharges were assumed to discharge at design flows and the fecal coliform permit limit of 200 counts/100 ml.

Fecal coliform land loading variables and the magnitude of loading from sources modeled as "other direct sources" were adjusted within reasonable range of known values until the resulting fecal coliform concentration at the pour point of the listed water body segment was less than or equal to 180 counts/100ml. (i.e. the water quality standard of 200 counts/100ml minus 20 counts/100ml [i.e. a 10% explicit MOS]).

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The WLA is the load associated with the daily discharge loads of all modeled NPDES permitted facilities summed over the 30-day critical period. The discharge load for each facility represents the design flow at a fecal coliform concentration of 200 counts/100 ml (permitted limit).
The LA is the daily fecal coliform load indirectly going to surface waters from all modeled land use areas as a result of buildup/washoff processes plus the daily discharge load sources modeled as "other direct sources" and the result summed over the 30-day critical period.
The TMDL for the 30 day critical period is WLAs plus LAs.
The TMDLs, WLAs, and LAs for the listed water bodies are summarized in Table 9.
8.4.1 Waste Load Allocations
There are 55 NPDES permitted facilities that discharge fecal coliform bacteria in the Ocmulgee River basin. Future facility permits will require end-of-pipe limits equivalent to the water quality standard of 200 counts/100 ml or less.
8.4.2 Load Allocations
There are two modes of transport for non-point source fecal coliform bacteria loading in the model. First, loading from failing septic systems, animals in the stream, and leaking sewer system collection lines are modeled as "other direct sources" to the stream and are independent of precipitation. The second mode involves loading resulting from fecal coliform accumulation on land surfaces and wash-off during storm events. Fecal coliform applied to land is subject to a die-off rate and an absorption rate before it is transported to the stream.
Model results were analyzed to determine which sources of fecal coliform have the greatest impact on the fecal coliform bacteria loadings in the Ocmulgee River basin. The results of this analysis are indicated in Table 10, for each of the 303(d) listed segments for which a TMDL was developed. Wasteload and Load allocation scenarios that would meet in-stream water quality standards for each of the 303(d) listed streams analyzed in the Ocmulgee River basin are provided in Table 10. Possible load reduction scenarios that would meet in-stream water quality standards for each of the 303(d) listed streams analyzed in the Ocmulgee River basin is provided in Table 11.
Best management practices (BMPs) that could be used to implement this TMDL include controlling pollution from agriculture and urban runoff, identification and elimination of illicit discharges and other unknown "direct sources" of fecal coliform bacteria to the streams, and repair of leaking sewer collection lines and failing septic systems. Loading from agricultural sources may be minimized by adoption of NRCS resource management practices. NRCS practices include measures such as covering manure stacks exposed to the environment; reducing animal access to streams; and applying manure to croplands (if applicable) at agronomic rates. Measures which can reduce urban contributions include: repair and renovation of leaking sewer collection systems; reduction of sewer overflows and surcharges by use of separate conduit systems for domestic wastewater and stormwater; encouragement of households and businesses to connect to public sewer systems and reduce the population using septic systems.

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Additional monitoring and characterization of the watershed should be conducted to verify the various other direct sources of fecal coliform bacteria in the watershed.
8.4.3 Seasonal Variation
Seasonal variation was incorporated in the continuous simulation water quality model by using varying monthly loading rates and daily meteorological data.
9.0 RECOMMENDATIONS
The TMDL analysis was performed using the best data available to specify WLAs and LAs that will meet the water quality criteria for fecal coliform in the Ocmulgee River basin so as to support the use classification specified for each of the listed segments in Table 2. The following recommendations and strategies are targeted toward source identification, collection of data to support additional modeling and evaluation, and subsequent reduction in sources that are causing impairment of water quality.
9.1 Point Source Facilities
All discharges from point source facilities are required to be in compliance with the conditions of their NPDES permit at all times. All permitted facilities with the potential to discharge fecal coliform which do not currently have a fecal coliform limit will be given a fecal coliform limit of not more than 200 counts / 100 ml during the permit reissuance process.
9.2 Urban Sources of Fecal Coliform Loading
Urban sources of fecal coliform can best be addressed using a stategy which involves public participation and intergovernmental coordination to reduce the discharge of pollutants to the maximum extent practicable using management practices, control techniques, public education, and other appropriate methods and provisions. The following activities and programs conducted by cities, counties, and state agencies are recommended:
Monitoring programs to identify the types and extent of fecal coliform water quality problems, relative degradation or improvement over time, areas of concern, and source identification;
Requirements that all new and replacement sanitary sewage systems are designed to minimize discharges from the system into storm sewer systems;
Mechanisms for reporting and correcting illicit connections, breaks, surcharges, and general sanitary sewer system problems;
Sustained compliance with NPDES permit discharge requirements.

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9.3 Agricultural Sources of Fecal Coliform Loading

The Georgia Environmental Protection Division (EPD) should coordinate with the Georgia Soil and Water Conservation Commission, and the Natural Resources Conservation Service (NRCS) to address issues concerning fecal coliform loading from agricultural lands in the Ocmulgee River basin. It is recommended that information (such as livestock populations by subwatershed, animal access to streams, manure application practices, etc.) be evaluated periodically so that watershed models can be updated to reflect current conditions. It is further recommended that BMPs be utilized to reduce the amount of fecal coliform bacteria transported to surface waters from agricultural sources to the maximum extent practicable.

9.4

Stream Monitoring

Further monitoring of the fecal coliform concentrations at current and additional water quality monitoring stations in the watershed is needed to characterize sources of fecal coliform bacteria and document future reduction of loading. Georgia's watershed management approach specifies a five-year cycle for planning and assessment. Watersheds will be examined (or re-examined) as appropriate, on a rotating basis.

9.5

Future Efforts

This TMDL represents the first phase of a long-term process to reduce fecal coliform loading to meet water quality standards in the Ocmulgee River basin. Implementation strategies will be reviewed and the TMDLs will be refined as necessary in the next phase (next five-year cycle). The phased approach will support progress toward water quality standards attainment in the future. In accordance with USEPA TMDL guidance, these TMDLs may be revised based on results of future monitoring and source characterization data efforts.

10.0 Public Participation
A thirty day public notice will be provided for this TMDL document. During the public notice period, the availability of the TMDLs will be public noticed, a copy of the TMDLs will be provided as requested, and the public will be invited to provide comments on the TMDLs.

REFERENCES
American Society of Agricultural Engineers (ASAE), 1998. ASAE Standards, 45th Edition, Standards Engineering Practices Data.
Horner. Water Quality Criteria/Pollutant Loading Estimation/Treatment Effectiveness Estimation. In R.W. Beck and Associates, Covington Master Drainage Plan, King County Surface Water Management Division, Seattle, Washington, 1992.
Horsley & Witten, Inc., 1996. Identification and Evaluation of Nutrient Bacterial Loadings to Maquiot Bay, Brunswick and Freeport, Maine. Casco Bay Estuary Project.
Metcalf & Eddy, 1991. Wastewater Engineering: Treatment, disposal, Reuse, Third Edition, McGraw-Hill, Inc., New York.

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NCSU, 1994. Livestock Manure Production and Characterization in North Carolina, North Carolina Cooperative Extension Service, North Carolina State University (NCSU) College of Agriculture and Life Sciences, Raleigh, January 1994.
Georgia EPD, 2000. Final Georgia 2000 303(d) / 305(b) List, August 2000 (As Revised April, 2001). State of Georgia, Department of Natural Resources, Environmental Protection Division, Water Protection Branch.
Georgia EPD, 2000. State of Georgia Rules and Regulations for Water Quality Control, Chapter 391-3-6 Revised, July, 2000. State of Georgia, Department of Natural Resources, Environmental Protection Division, Water Protection Branch.
Georgia WRD, 1999. Personal Communications with a representative from the Wildlife Resources Division Georgia Department of Natural Resources, 2070 U.S. Highway 278, SE, Social Circle, GA. November, 1999.
USDA, 2001. Personal Communications with Mr. Jimmy Bramblett, Water Resources Specialist, U.S. Department of Agriculture NRCS, 355 East Hancock Ave., Athens, GA. March-May, 2001.
USEPA, 1991. Guidance for Water Qualitybased Decisions: The TMDL Process. U.S. Environmental Protection Agency, Office of Water, Washington, DC. EPA-440/4-91-001, April 1991.
USEPA, 2001. Protocol for Developing Pathogen TMDLs, First Edition. U.S. Environmental Protection Agency, Office of Water, Washington, DC. EPA-841-R-00-002, January, 2001.
USEPA. 2000. Draft Level III and IV Ecoregions of EPA Region IV. U.S. Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Corvallis, Oregon.
USEPA, 1998. Better Assessment Science Integrating Point and Non-point Sources (BASINS), Version 2.0 User's Manual, U.S. Environmental Protection Agency, Office of Water, Washington D.C.

FIGURES

TABLES

Table 1 Land Use Distribution for Ocmulgee River Basin Land Use Categories - in units of acres (percent)
Stream/Segment

Bare Rock/Sand/Clay Deciduous Forest Emergent Herbaceous Wetlands Evergreen Forest High Intensity Commercial/Industrial/Transportation Low Intensity Commercial/Industrial/Transportation High Intensity Residential Low Intensity Residential Mixed Forest Open Water Other Grasses Urban/Recreational Pasture/Hay Quarries/Strip Mines/Gravel Pits Row Crops Transitional Woody Wetlands Unclassified

Alcovy River (Cedar Creek to Bay Creek)
Alligator Creek (Batson Creek to Lime Sink Creek) Almand Branch (Tanyard Branch to Snapping Shoals) Bay Creek (Headwaters to Beaver Creek)
Beaver Ruin Creek (Gwinnett County)
Big Cotton Indian Creek (Panther Creek to Brush Creek)

2 (0.0)

14430 (36.9)

17 (0.0)

5920 (15.1)

995 (2.6)

0 (0.0)

254 (0.7)

934 (2.4)

9056 (23.2)

225 (0.6)

658 (1.7)

4322 (11.1)

0 (0.0)

1306 (3.3)

173 (0.4)

804 (2.1)

0 (0.0)

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

0 (0.0)

1046 (17.7)

20 (0.3)

880

610

(14.9) (10.3)

0 (0.0)

153 (2.6)

832

949

(14.1) (16.0)

35 (0.6)

286 (4.8)

375 (6.3)

0 (0.0)

309 (5.2)

4 (0.07)

421 (7.1)

0 (0.0)

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

0 (0.0)

914 (14.9)

89 (1.5)

441 (7.2)

1007 (16.4)

0 (0.0)

792 1627 740 (12.9) (26.6) (12.1)

98 (1.6)

192 (3.1)

0 (0.0)

0 (0.0)

0 (0.0)

159 (2.6)

70 (1.1)

0 (0.0)

12 (0.0)

19675 (24.4)

102 (0.1)

14501 (18.0)

3917 (4.9)

0 (0.0)

1339 (1.7)

7779 (9.6)

16253 (20.1)

1505 (1.9)

1486 (1.8)

7539 (9.3)

287 (0.4)

3822 (4.7)

229 (0.3)

2361 (2.9)

0 (0.0)

Bare Rock/Sand/Clay Deciduous Forest Emergent Herbaceous Wetlands Evergreen Forest High Intensity Commercial/Industrial/Transportation Low Intensity Commercial/Industrial/Transportation High Intensity Residential Low Intensity Residential Mixed Forest Open Water Other Grasses Urban/Recreational Pasture/Hay Quarries/Strip Mines/Gravel Pits Row Crops Transitional Woody Wetlands Unclassified

Stream/Segment

Land Use Categories - in units of acres (percent)

Big Flat Creek (Headwaters to Flat Creek)
Big Haynes Creek (Brushy Creek to Little Panther Creek) Big Haynes Creek (Headwaters to Brushy Creek)
Big Haynes Creek (Little Haynes Creek to Yellow River) Big Indian Creek (Mossy Creek to Ocmulgee River) Big Sandy Creek (Aboothlacoosta Creek to Ocmulgee River)

0 (0.0)

3968 (32.5)

62 (0.5)

1240 (10.2)

140 (1.2)

0 (0.0)

51 (0.4)

188 (1.5)

1907 (15.6)

34 (0.3)

101 (0.8)

3155 (25.8)

0 (0.0)

938 (7.7)

66 (0.5)

367 (3.0)

0 (0.0)

0 (0.0)

4440 (20.5)

3 (0.0)

4328 (20.0)

297 (1.4)

0 (0.0)

139 (0.6)

1030 (4.8)

5485 (25.3)

210 (1.0)

434 (2.0)

3946 (18.2)

0 (0.0)

1320 (6.1)

1 (0.0)

40 (0.2)

0 (0.0)

0 (0.0)

4042 (19.7)

3 (0.0)

4123 (20.0)

292 (1.4)

0 (0.0)

139 (0.7)

1029 (5.0)

5154 (25.1)

199 (1.0)

428 (2.1)

3866 (18.8)

0 (0.0)

1256 (6.1)

1 (0.0)

40 (0.2)

0 (0.0)

1 (0.0)

14429 (27.4)

26 (0.1)

10708 (20.3)

560 (1.1)

0 (0.0)

169 (0.3)

1178 (2.2)

12796 (24.3)

453 (0.9)

606 (1.2)

7568 (14.4)

0 (0.0)

2973 (5.7)

39 (0.1)

1154 (2.2)

0 (0.0)

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

Bare Rock/Sand/Clay Deciduous Forest Emergent Herbaceous Wetlands Evergreen Forest High Intensity Commercial/Industrial/Transportation Low Intensity Commercial/Industrial/Transportation High Intensity Residential Low Intensity Residential Mixed Forest Open Water Other Grasses Urban/Recreational Pasture/Hay Quarries/Strip Mines/Gravel Pits Row Crops Transitional Woody Wetlands Unclassified

Stream/Segment

Land Use Categories - in units of acres (percent)

Bromolow Creek

(Headwaters to Beaver Ruin

0 (0.0)

Creek)

Cabin Creek

(Headwaters Griffin to Towaliga TBD

River)

Camp Creek

(Headwaters to Jackson Creek)

0 (0.0)

Cedar Creek

(Headwaters to Alcovy River)

0 (0.0)

Cobbs Creek

(Headwaters to Shoal Creek)

0 (0.0)

Conley Creek

(Headwaters to South River)

0 (0.0)

921 (13.7)

75 (1.1)

770

1107

(11.4) (16.4)

0 (0.0)

518 (7.7)

1684 1073 (25.0) (15.9)

13 (0.2)

354 (5.3)

1 (0.0)

0 (0.0)

0 (0.0)

32 (0.5)

201 (3.0)

0 (0.0)

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

738 (15.0)

0 (0.0)

826 (16.8)

370 (7.5)

0 (0.0)

179 (3.6)

1103 1243 (22.4) (25.3)

8 (0.2)

191 (3.9)

30 (0.6)

0 (0.0)

111 (2.3)

120 (2.4)

0 (0.0)

0 (0.0)

1889 (48.4)

0 (0.0)

493 (12.6)

4 (0.1)

0 (0.0)

0 (0.0)

1 (0.0)

586 (15.0)

2 (0.1)

0 (0.0)

667 (17.1)

0 (0.0)

191 (4.9)

14 (0.4)

58 (1.5)

0 (0.0)

674 (10.9)

0 (0.0)

837 (13.5)

301 (4.9)

0 (0.0)

449 (7.3)

2955 777 (47.8) (12.6)

7 (0.1)

148 (2.4)

0 (0.0)

0 (0.0)

7 (0.1)

27 (0.4)

0 (0.0)

0 (0.0)

2613 (27.4)

0 (0.0)

1522 1084 (16.0) (11.4)

0 (0.0)

248 (2.6)

1239 1958 (13.0) (20.5)

28 (0.3)

239 (2.5)

154 (1.6)

0 (0.0)

187 (2.0)

265 (2.8)

0 (0.0)

0 (0.0)

Bare Rock/Sand/Clay Deciduous Forest Emergent Herbaceous Wetlands Evergreen Forest High Intensity Commercial/Industrial/Transportation Low Intensity Commercial/Industrial/Transportation High Intensity Residential Low Intensity Residential Mixed Forest Open Water Other Grasses Urban/Recreational Pasture/Hay Quarries/Strip Mines/Gravel Pits Row Crops Transitional Woody Wetlands Unclassified

Stream/Segment

Land Use Categories - in units of acres (percent)

Doless Creek (Headwaters to Doolittle Creek)
Doolittle Creek (Headwaters to South River)
Falling Creek (Little Falling Creek to Ocmulgee River) Honey Creek (Headwaters to South River)
Hopkins Creek (Headwaters to Alcovy River)
House Creek (Ball Creek to Little House Creek)

0 (0.0)
2 (0.1)
TBD
0 (0.0)
0 (0.0)
TBD

97 (9.4)

0 (0.0)

102 (9.9)

199 (19.3)

0 (0.0)

74 (7.2)

351

103

(34.1) (10.0)

1 (0.1)

102 (9.9)

0 (0.0)

0 (0.0)

1 (0.1)

0 (0.0)

0 (0.0)

0 (0.0)

437 (12.1)

0 (0.0)

423 (11.7)

179 (4.9)

0 (0.0)

220 (6.1)

1659 (45.9)

438 (12.1)

24 (0.7)

233 (6.4)

2 (0.1)

0 (0.0)

0 (0.0)

1 (0.0)

0 (0.0)

0 (0.0)

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

4117 (22.8)

3 (0.0)

4615 (25.5)

355 (2.0)

0 (0.0)

136 (0.8)

1031 (5.7)

4218 (23.3)

93 (0.5)

331 (1.8)

1676 (9.3)

419 (2.3)

799 (4.4)

116 (0.6)

160 (0.9)

0 (0.0)

1398 (45.2)

0 (0.0)

425 (13.7)

68 (2.2)

0 (0.0)

23 (0.7)

102 (3.3)

561 (18.1)

4 (0.1)

30 (1.0)

345 (11.1)

0 (0.0)

94 (3.0)

45 (1.5)

0 (0.0)

0 (0.0)

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

Bare Rock/Sand/Clay Deciduous Forest Emergent Herbaceous Wetlands Evergreen Forest High Intensity Commercial/Industrial/Transportation Low Intensity Commercial/Industrial/Transportation High Intensity Residential Low Intensity Residential Mixed Forest Open Water Other Grasses Urban/Recreational Pasture/Hay Quarries/Strip Mines/Gravel Pits Row Crops Transitional Woody Wetlands Unclassified

Stream/Segment

Land Use Categories - in units of acres (percent)

Intrenchment Creek (Headwaters to South River)
Jacks Creek (Headwaters to Yellow River)
Jackson Creek (Gwinnett County)
Little Haynes Creek (Hwy 20 to Big Haynes Creek)
Little Stone Mountain Creek (Headwaters to Stone Mountain Lake) Little Suwanee Creek (Tributary to Yellow River)

0 (0.0)

1107 (15.0)

0 (0.0)

297 (4.0)

1467 (19.9)

0 (0.0)

1103 2316 (14.9) (31.4)

554 (7.5)

7 (0.1)

444 (6.0)

3 (0.0)

0 (0.0)

12 (0.2)

76 (1.0)

0 (0.0)

0 (0.0)

0 (0.0)

549 (16.6)

0 (0.0)

399 (12.1)

98 (2.3)

0 (0.0)

200 (6.1)

1076 709 (32.6) (21.5)

2 (0.1)

267 (8.1)

3 (0.1)

0 (0.0)

2 (0.1)

1 (0.0)

0 (0.0)

0 (0.0)

0 (0.0)

1936 (14.1)

0 (0.0)

2138 (15.5)

670 (4.9)

0 (0.0)

943 (6.9)

4155 3080 (30.2) (22.4)

35 (0.3)

461 (3.4)

49 (0.4)

0 (0.0)

133 (1.0)

157 (1.1)

0 (0.0)

0 (0.0)

0 (0.0)

5666 (33.3)

9 (0.1)

3092 (18.2)

213 (1.3)

0 (0.0)

29 (0.2)

129 (0.8)

4032 (23.7)

69 (0.4)

119 (0.7)

2284 (13.4)

0 (0.0)

937 (5.5)

8 (0.1)

411 (2.4)

0 (0.0)

0 (0.0)

352 (17.7)

0 (0.0)

489 (24.6)

32 (1.6)

0 (0.0)

10 (0.5)

363

690

(18.2) (34.6)

6 (0.3)

40 (2.0)

3 (0.2)

0 (0.0)

7 (0.4)

0 (0.0)

0 (0.0)

0 (0.0)

0 (0.0)

1611 (29.3)

33 (0.6)

681 (12.4)

310 (5.6)

0 (0.0)

79 (1.4)

649 1308 (11.8) (23.8)

91 (1.7)

207 (3.8)

99 (1.8)

0 (0.0)

68 (1.2)

1 (0.0)

357 (6.5)

0 (0.0)

Bare Rock/Sand/Clay Deciduous Forest Emergent Herbaceous Wetlands Evergreen Forest High Intensity Commercial/Industrial/Transportation Low Intensity Commercial/Industrial/Transportation High Intensity Residential Low Intensity Residential Mixed Forest Open Water Other Grasses Urban/Recreational Pasture/Hay Quarries/Strip Mines/Gravel Pits Row Crops Transitional Woody Wetlands Unclassified

Stream/Segment

Land Use Categories - in units of acres (percent)

McClain Branch (Headwaters to Honey Creek)

0 (0.0)

575 (20.5)

0 (0.0)

546 (19.4)

101 (3.6)

0 (0.0)

39 (1.4)

472

491

(16.8) (17.5)

5 (0.2)

159 (5.7)

216 (7.7)

0 (0.0)

159 (5.7)

46 (1.6)

0 (0.0)

0 (0.0)

No Business Creek (Headwaters to Norris Lake)

0 (0.0)

2410 (26.1)

0 (0.0)

1620 (17.5)

248 (2.7)

0 (0.0)

187 (2.0)

929 2348 (10.1) (25.4)

112 (1.2)

265 (2.9)

748 (8.1)

0 (0.0)

314 (3.4)

53 (0.6)

0 (0.0)

0 (0.0)

North Branch South River (Atlanta)

1 (0.0)

580 (15.2)

0 (0.0)

52 (1.4)

928 (24.3)

0 (0.0)

587 1305 (15.4) (34.2)

195 (5.1)

8 (0.2)

121 (3.2)

3 (0.1)

0 (0.0)

34 (0.9)

2 (0.1)

0 (0.0)

0 (0.0)

Ocmulgee River

(Beaverdam Creek to Walnut

TBD

Creek)

Ocmulgee River

(Sandy Run Creek to Big Indian TBD

Creek)

Ocmulgee River

(Tobesofkee Creek to

TBD

Echeconnee Creek)

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

Bare Rock/Sand/Clay Deciduous Forest Emergent Herbaceous Wetlands Evergreen Forest High Intensity Commercial/Industrial/Transportation Low Intensity Commercial/Industrial/Transportation High Intensity Residential Low Intensity Residential Mixed Forest Open Water Other Grasses Urban/Recreational Pasture/Hay Quarries/Strip Mines/Gravel Pits Row Crops Transitional Woody Wetlands Unclassified

Stream/Segment

Land Use Categories - in units of acres (percent)

Pew Creek

(Gwinnett County)

0 (0.0)

Rocky Creek

(1 mile u/s Rocky Creek Road to TBD

Tobesofkee Creek)

Shetley Creek

(Headwaters to Bromolow

0 (0.0)

Creek)

Shoal Creek

(Headwaters to Alcovy River)

0 (0.0)

Shoal Creek

(Headwaters to South River)

0 (0.0)

Snapfinger Creek

(Dekalb County)

0 (0.0)

3823 (19.8)

16 (0.1)

2663 (13.8)

1377 (7.2)

0 (0.0)

779 (4.0)

4487 4063 (23.3) (21.1)

111 (0.6)

1301 (6.8)

326 (1.7)

0 (0.0)

72 (0.4)

161 (0.8)

87 (0.5)

0 (0.0)

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

125 (15.2)

0 (0.0)

76 (9.2)

86 (10.5)

0 (0.0)

38 (4.6)

288

158

(35.0) (19.2)

0 (0.0)

51 (6.2)

0 (0.0)

0 (0.0)

0 (0.0)

1 (0.1)

0 (0.0)

0 (0.0)

1698 (31.8)

0 (0.0)

756 (14.2)

201 (3.8)

0 (0.0)

184 (3.5)

571 1284 (10.7) (24.1)

27 (0.5)

155 (2.9)

381 (7.1)

0 (0.0)

77 (1.4)

0 (0.0)

0 (0.0)

0 (0.0)

707 (11.3)

0 (0.0)

880 (14.1)

272 (4.4)

0 (0.0)

479 (7.7)

2951 681 (47.3) (10.9)

10 (0.2)

231 (3.7)

8 (0.1)

0 (0.0)

14 (0.2)

4 (0.1)

0 (0.0)

0 (0.0)

3699 (15.0)

0 (0.0)

3695 (14.9)

1850 (7.5)

0 (0.0)

1709 (6.9)

9714 3103 (39.3) (12.5)

98 (0.4)

693 (2.8)

7 (0.0)

0 (0.0)

41 (0.2)

130 (0.5)

1 (0.0)

0 (0.0)

Bare Rock/Sand/Clay Deciduous Forest Emergent Herbaceous Wetlands Evergreen Forest High Intensity Commercial/Industrial/Transportation Low Intensity Commercial/Industrial/Transportation High Intensity Residential Low Intensity Residential Mixed Forest Open Water Other Grasses Urban/Recreational Pasture/Hay Quarries/Strip Mines/Gravel Pits Row Crops Transitional Woody Wetlands Unclassified

Stream/Segment

Land Use Categories - in units of acres (percent)

Snapping Shoals Creek (Almand Branch to South River) South River (Atlanta to Flakes Mill Road)
South River (Flakes Mill Road to Pole Bridge Creek) South River (Hwy 20 to Snapping Shoals Creek) South River (Pole Bridge Creek to Hwy 20)
South River (Snapping Shoals to Jackson Lake)

0 (0.0)

6726 (26.7)

36 (0.1)

4216 (16.7)

1326 (5.3)

0 (0.0)

413 (1.6)

1884 (7.5)

3809 (15.1)

135 (0.5)

662 (2.6)

3012 (11.9)

0 (0.0)

1742 (6.9)

126 (0.5)

1130 (4.5)

0 (0.0)

3 (0.0)

11467 (17.9)

0 (0.0)

6838 7902 (10.7) (12.4)

0 (0.0)

5025 (7.9)

20335 8765 (31.8) (13.7)

121 (0.2)

2337 (3.7)

204 (0.3)

0 (0.0)

348 (0.5)

563 (0.9)

0 (0.0)

0 (0.0)

2 (0.0)

8204 (21.1)

10 (0.0)

6470 (16.6)

2094 (5.4)

0 (0.0)

1818 (4.7)

10993 6741 (28.2) (17.3)

183 (0.5)

847 (2.2)

484 (1.2)

0 (0.0)

346 (0.9)

464 (1.2)

284 (0.7)

0 (0.0)

14 (0.0)

54403 (28.6)

223 (0.1)

34254 (18.0)

6117 (3.2)

0 (0.0)

1878 (1.0)

10583 35744 (5.6) (18.8)

2620 (1.4)

2598 (1.4)

24057 (12.6)

0 (0.0)

12310 (6.5)

509 (0.3)

4701 (2.5)

0 (0.0)

0 (0.0)

15429 (27.4)

3 (0.0)

12476 (22.1)

1087 (1.9)

0 (0.0)

608 (1.1)

4523 (8.0)

12770 (22.7)

470 (0.8)

829 (1.5)

4777 (8.5)

602 (1.1)

2151 (3.8)

397 (0.7)

246 (0.4)

0 (0.0)

0 (0.0)

13686 (45.4)

15 (0.1)

5811 (19.3)

123 (0.4)

0 (0.0)

9 (0.0)

136 (0.5)

5015 (16.6)

698 (2.3)

36 (0.1)

3102 (10.3)

0 (0.0)

1284 (4.3)

28 (0.1)

201 (0.7)

0 (0.0)

Bare Rock/Sand/Clay Deciduous Forest Emergent Herbaceous Wetlands Evergreen Forest High Intensity Commercial/Industrial/Transportation Low Intensity Commercial/Industrial/Transportation High Intensity Residential Low Intensity Residential Mixed Forest Open Water Other Grasses Urban/Recreational Pasture/Hay Quarries/Strip Mines/Gravel Pits Row Crops Transitional Woody Wetlands Unclassified

Stream/Segment

Land Use Categories - in units of acres (percent)

Stone Mountain Creek (Headwaters to Stone Mountain Lake) Sugar Creek (U/s Memorial Drive to South River) Sweetwater Creek (Lee Daniel Creek to Yellow River) Swift Creek (Headwaters to Yellow River)
Tobesofkee Creek (Cole Creek to Todd Creek)
Tobesofkee Creek (Lake Tobesofkee to Rocky Creek)

0 (0.0)

582 (22.4)

0 (0.0)

457

363

(17.6) (14.0)

0 (0.0)

81 (3.1)

334

714

(12.9) (27.5)

5 (0.2)

45 (1.7)

0 (0.0)

0 (0.0)

0 (0.0)

14 (0.5)

0 (0.0)

0 (0.0)

0 (0.0)

826 (14.0)

0 (0.0)

455 (7.7)

377 (6.4)

0 (0.0)

554 (9.4)

2769 676 (47.1) (11.5)

2 (0.0)

218 (3.7)

1 (0.0)

0 (0.0)

1 (0.0)

4 (0.1)

0 (0.0)

0 (0.0)

0 (0.0)

5876 (18.7)

188 (0.6)

4371 3420 (13.9) (10.9)

0 (0.0)

1872 (6.0)

6162 6192 (19.6) (19.7)

258 (0.8)

1146 (3.7)

827 (2.6)

0 (0.0)

272 (0.9)

356 (1.1)

496 (1.6)

0 (0.0)

0 (0.0)

1320 (26.0)

0 (0.0)

1192 (23.5)

111 (2.2)

0 (0.0)

11 (0.2)

188 (3.7)

1213 (23.4)

95 (1.9)

48 (1.0)

108 (2.1)

572 (11.3)

188 (3.7)

31 (0.6)

0 (0.0)

0 (0.0)

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

Bare Rock/Sand/Clay Deciduous Forest Emergent Herbaceous Wetlands Evergreen Forest High Intensity Commercial/Industrial/Transportation Low Intensity Commercial/Industrial/Transportation High Intensity Residential Low Intensity Residential Mixed Forest Open Water Other Grasses Urban/Recreational Pasture/Hay Quarries/Strip Mines/Gravel Pits Row Crops Transitional Woody Wetlands Unclassified

Stream/Segment

Land Use Categories - in units of acres (percent)

Town Branch (D/S Jackson South WPCP to Aboothlacoosta Creek) Turkey Creek (Headwaters to Yellow River)
Turnpike Creek (Hwy 280 to Sugar Creek)
Tussahaw Creek (Wolf Creek to Lake Jackson)
Walnut Creek (Headwaters to Ocmulgee River) Watson Creek (Headwaters to Yellow River)

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

0 (0.0)

262 (15.6)

0 (0.0)

298 (17.7)

30 (1.8)

0 (0.0)

75 (4.5)

505

365

(30.0) (21.7)

2 (0.1)

81 (4.8)

36 (2.1)

0 (0.0)

15 (0.9)

14 (0.8)

0 (0.0)

0 (0.0)

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

0 (0.0)

285 (11.2)

0 (0.0)

548 (21.6)

90 (3.6)

0 (0.0)

96 (3.8)

622

662

(24.5) (26.1)

1 (0.0)

163 (6.4)

40 (1.6)

0 (0.0)

14 (0.6)

17 (0.7)

0 (0.0)

0 (0.0)

Bare Rock/Sand/Clay Deciduous Forest Emergent Herbaceous Wetlands Evergreen Forest High Intensity Commercial/Industrial/Transportation Low Intensity Commercial/Industrial/Transportation High Intensity Residential Low Intensity Residential Mixed Forest Open Water Other Grasses Urban/Recreational Pasture/Hay Quarries/Strip Mines/Gravel Pits Row Crops Transitional Woody Wetlands Unclassified

Stream/Segment

Land Use Categories - in units of acres (percent)

Wise Creek (Headwaters to Kinnard Creek)
Yellow River (Big Haynes Creek to Jackson Lake) Yellow River (Hwy 124 to Big Haynes Creek) Yellow River (Sweetwater Creek to Hwy 124) Yellow Water Creek (1 mile d/s Stark Road)
Lake Jackson (Newton, Butts, and Jasper Counties)

TBD
4 (0.0)
2 (0.0)
0 (0.0)
TBD
TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

15111 (24.9)

826 (0.2)

81472 21647 (17.6) (4.7)

0 (0.0)

12124 58639 99123 (2.6) (12.7) (21.4)

4222 (0.9)

13726 31688 (3.0) (6.9)

1886 (0.4)

13078 (2.8)

2666 (0.6)

6216 (1.3)

0 (0.0)

37697 (22.7)
20569 (19.8)

284 (0.2)
237 (0.2)

28328 (17.1)
15442 (14.9)

9554 (5.8)
7189 (6.9)

0 (0.0)
0 (0.0)

5555 (3.3)
4780 (4.6)

28714 36553 (17.3) (22.0)
23217 22349 (22.4) (21.6)

1705 (1.0)
654 (0.6)

6104 (3.7)
4747 (4.6)

4701 (2.8)
1950 (1.9)

1224 (0.7)
0 (0.0)

2608 (1.6)
794 (0.8)

994 (0.6)
725 (0.7)

2081 (1.3)
999 (1.0)

0 (0.0)
0 (0.0)

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

0 (0.0)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0 (0.0)

TBD = To Be Determined

Table 2 Waterbodies Listed for Fecal Coliform Bacteria in the Ocmulgee River Basin

Stream Name
Alcovy River
Alligator Creek
Almand Branch Bay Creek Beaver Ruin Creek Big Cotton Indian Creek Big Flat Creek Big Haynes Creek
Big Haynes Creek
Big Haynes Creek
Big Indian Creek
Big Sandy Creek
Bromolow Creek
Cabin Creek Camp Creek Cedar Creek Cobbs Creek Conley Creek Doless Creek Doolittle Creek Falling Creek Honey Creek Hopkins Creek House Creek Intrenchment Creek Jacks Creek Jackson Creek Little Haynes Creek

Segment Description

Segment Length (miles)

Cedar Creek to Bay Creek

4

Batson Creek to Lime Sink Creek

12

Tanyard Branch to Snapping Shoals

5

Headwaters to Beaver Creek

9

Gwinnett County

8

Panther Creek to Brush Creek

5

Headwaters to Flat Creek

13

Brushy Creek to Little Panther Creek

2

Headwaters to Brushy Creek

9

Little Haynes Creek to Yellow River

5

Mossy Creek to Ocmulgee River

7

Aboothlacoosta Creek to Ocmulgee River

10

Headwaters to Beaver Ruin Creek

5

Headwaters Griffin to Towaliga River

16

Headwaters to Jackson Creek

6

Headwaters to Alcovy River

4

Headwaters to Shoal Creek

7

Headwaters to South River

9

Headwaters to Doolittle Creek

2

Headwaters to South River

5

Little Falling Creek to Ocmulgee River

9

Headwaters to South River

13

Headwaters to Alcovy River

4

Ball Creek to Little House Creek

8

Headwaters to South River

6

Headwaters to Yellow River

4

Gwinnett County

7

Hwy 20 to Big Haynes Creek

11

Designated Use
Classification
Fishing/ Drinking Water
Fishing

Partially Supporting Designated
Uses

Not Supporting Designated
Uses
X
X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Drinking Water

X

Fishing/

Drinking

X

Water

Drinking Water

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Stream Name

Segment Description

Little Stone Mountain Creek Little Suwanee Creek McClain Branch No Business Creek North Branch South River

Headwaters to Stone Mountain Lake Tributary to Yellow River Headwaters to Honey Creek Headwaters to Norris Lake
Atlanta

Ocmulgee River

Beaverdam Creek to Walnut Creek

Ocmulgee River
Ocmulgee River Pew Creek Rocky Creek
Shetley Creek Shoal Creek Shoal Creek Snapfinger Creek Snapping Shoals Creek South River South River
South River South River South River Stone Mountain Creek Sugar Creek
Sweetwater Creek Swift Creek Tobesofkee Creek Tobesofkee Creek
Town Branch Turkey Creek Turnpike Creek Tussahaw Creek

Sandy Run Creek to Big Indian Creek Tobesofkee Creek to Echeconnee Creek Gwinnett County 1 mile u/s Rocky Creek Road to Tobesofkee Creek Headwaters to Bromolow Creek Headwaters to Alcovy River Headwaters to South River Dekalb County Almand Branch to South River Atlanta to Flakes Mill Road Flakes Mill Road to Pole Bridge Creek Hwy 20 to Snapping Shoals Creek Pole Bridge Creek to Hwy 20 Snapping Shoals to Jackson Lake Headwaters to Stone Mountain Lake U/s Memorial Drive to South River Lee Daniel Creek to Yellow River Headwaters to Yellow River Cole Creek to Todd Creek Lake Tobesofkee to Rocky Creek D/S Jackson South WPCP to Aboothlacoosta Creek Headwaters to Yellow River Hwy 280 to Sugar Creek Wolf Creek to Lake Jackson

Segment Length (miles)
3 2 2 6 3
10
23

Designated Use
Classification

Partially Supporting Designated
Uses

Not Supporting Designated
Uses

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing

X

Fishing/

Drinking

X

Water

Fishing

X

7

Fishing

X

4

Fishing

X

5

Fishing

X

2

Fishing

X

5

Fishing

X

7

Fishing

X

18

Fishing

X

10

Fishing

X

16

Fishing

X

9

Fishing

X

11

Fishing

X

15

Fishing

X

7

Fishing

X

4

Fishing

X

6

Fishing

X

6

Fishing

X

5

Fishing

X

8

Fishing

X

10

Fishing

X

3

Fishing

X

4

Fishing

X

24

Fishing

X

6

Fishing

X

Stream Name

Segment Description

Walnut Creek Watson Creek Wise Creek
Yellow River

Headwaters to Ocmulgee River Headwaters to Yellow River Headwaters to Ocmulgee River
Big Haynes Creek to Jackson Lake

Yellow River

Hwy 124 to Big Haynes Creek

Yellow River

Sweetwater Creek to Hwy 124

Yellow Water Creek 1 mile d/s Stark Road

Lake Jackson

Newton, Butts, and Jasper Counties

*Affected area equals 650 acres

Segment Length (miles)
20 3 6
25
16 16 7 N/A*

Designated Use
Classification

Partially Supporting Designated
Uses

Not Supporting Designated
Uses

Fishing

X

Fishing

X

Fishing

X

Fishing/

Drinking

X

Water

Drinking Water

X

Fishing

X

Fishing

X

Recreation

X

Table 3 1999 Water Quality Monitoring Stations

Stream Name
Alcovy River Alligator Creek Almand Branch Bay Creek Beaver Ruin Creek Big Cotton Indian Creek Big Flat Creek Big Haynes Creek Big Haynes Creek Big Haynes Creek Big Indian Creek Big Sandy Creek Bromolow Creek Cabin Creek Camp Creek Cedar Creek Cobbs Creek Conley Creek Doless Creek Doolittle Creek Falling Creek Honey Creek Hopkins Creek House Creek

Segment Description
Cedar Creek to Bay Creek Batson Creek to Lime Sink Creek Tanyard Branch to Snapping Shoals Headwaters to Beaver Creek Gwinnett County Panther Creek to Brush Creek Headwaters to Flat Creek Brushy Creek to Little Panther Creek Headwaters to Brushy Creek Little Haynes Creek to Yellow River Mossy Creek to Ocmulgee River Aboothlacoosta Creek to Ocmulgee River Headwaters to Beaver Ruin Creek Headwaters Griffin to Towaliga River Headwaters to Jackson Creek Headwaters to Alcovy River Headwaters to Shoal Creek Headwaters to South River Headwaters to Doolittle Creek Headwaters to South River Little Falling Creek to Ocmulgee River Headwaters to South River Headwaters to Alcovy River Ball Creek to Little House Creek

USGS Monitoring Station No.
02208182 02216028 02204748 02214472 No station 02204222 02208420 02207412
NA NA 02214835 02211199 02206030 02211380 02206235 02208180 02203873 02203899 04108701* 02203831 02212600 02204130 02208085 02215276

Monitoring Station Description
Alcovy River at State Road 81 near Loganville, Georgia Alligator Creek at State Road 46 near McRae, Georgia Almand Branch at State Road 138 near Conyers, Georgia Bay Creek at State Road 96 near Fort Valley, Georgia No station Big Cotton Indian Creek at Stockbridge Road near Stockbridge, Georgia Big Flat Creek at U.S. Highway 78 near Loganville, Georgia Big Haynes Creek at State Road 20 near Conyers, Georgia
NA
NA Big Indian Creek at State Road 247 near Kathleen, Georgia Big Sandy Creek at State Road 87 near Sandy, Georgia Bromolow Creek at Shackelford Road near Norcross, Georgia Cabin Creek at State Road 16 near Griffin, Georgia Camp Creek at Killian Hill Road near Lilburn, Georgia Cedar Creek at Luke Edwards Road near Dacula, Georgia Cobbs Creek at Rainbow Drive near Decatur, Georgia Conley Creek at River Road near Panthersville, Georgia Doless Creek at Flat Shoals Road near Decatur, Georgia Doolittle Creek at Flat Shoals Road near Decatur, Georgia
Falling Creek - FAS 1640 Near East Juliet Honey Creek at State Road 212 near Conyers, Georgia Hopkins Creek at Stanley Road near Dacula, Georgia House Creek at Sea Graves Road near Forest Glen, Georgia

Stream Name

Segment Description

Intrenchment Creek Jacks Creek

Headwaters to South River Headwaters to Yellow River

Jackson Creek

Gwinnett County

Little Haynes Creek Little Stone Mountain Creek Little Suwanee Creek
McClain Branch
No Business Creek North Branch South River Ocmulgee River
Ocmulgee River
Ocmulgee River

Hwy 20 to Big Haynes Creek Headwaters to Stone Mountain Lake Tributary to Yellow River Headwaters to Honey Creek Headwaters to Norris Lake
Atlanta
Beaverdam Creek to Walnut Creek Sandy Run Creek to Big Indian Creek Tobesofkee Creek to Echeconnee Creek

Pew Creek

Gwinnett County

Rocky Creek Shetley Creek Shoal Creek Shoal Creek

1 mile u/s Rocky Creek Road to Tobesofkee Creek Headwaters to Bromolow Creek Headwaters to Alcovy River Headwaters to South River

Snapfinger Creek

Dekalb County

Snapping Shoals Creek South River South River South River South River South River

Almand Branch to South River Atlanta to Flakes Mill Road Flakes Mill Road to Pole Bridge Creek Hwy 20 to Snapping Shoals Creek Pole Bridge Creek to Hwy 20 Snapping Shoals to Jackson Lake

USGS Monitoring Station No.
02203700 02207060 02206300 02207430 02207135 02205130 02204128 02207185 No station
02212950 02214265 02213700 02205522 02213660 02213675 02206000 02208140 02203850 02203961 02204776 02203630 02203800 02203965 02204520 02204070 02204149 02204810

Monitoring Station Description
Intrenchment Creek at Bailey Street near Atlanta, Georgia Jacks Creek at State Road 264 near Centerville, Georgia Jackson Creek at Arcado Road near Luxomni, Georgia Little Haynes Creek at State Road 138 near Conyers, Georgia Little Stone Mountain Creek at Old Stone Mountain Road near Stone Mountain, Georgia Little Suwanee Creek at Russell Road near Lawrenceville, Georgia McClain Branch at Troupe Smith Road near Conyers, Georgia No Business Creek at Lee Road near Snellville, Georgia
No station
Ocmulgee River - Macon Water Intake
Ocmulgee River - Georgia Highway 96 Ocmulgee River - 6.0 Miles Downstream from Tobesofkee Creek Pew Creek at Patterson Road near Lawrenceville, Georgia Rocky Creek at Log Cabin Drive near Macon, Georgia and Rocky Creek at Rocky Creek Road near Macon, Georiga Shetley Creek at Old Norcross Road near Norcross, Georgia Shoal Creek at Bramlett Shoals Road near Lawrenceville, Georgia Shoal Creek at Rainbow Drive near Atlanta, Georgia Snapfinger Creek at State Road 155 near Panthersville, Georgia Snapping Shoals Creek at Bethany Road near Oak Hill, Georgia South River at Jonesboro Road at Atlanta, Georgia and South River at Bouldercrest Road
South River - Georgia Highway 155 South River - Georgia Highway 81 at Snapping Shoals South River - Klondike Road and South River at State Road 20 near Kelleytown, Georgia South River at Island Shoals Road near Snapping Shoals, Georgia

Stream Name

Segment Description

USGS Monitoring Station No.

Monitoring Station Description

Stone Mountain Creek

Headwaters to Stone Mountain Lake

02207130

Stone Mountain Creek at Silver Hill Road near Stone Mountain, Georgia

Sugar Creek

U/s Memorial Drive to South River

02203820

Sugar Creek at Clifton Church Road near Atlanta, Georgia

Sweetwater Creek

Lee Daniel Creek to Yellow River

02206100

Sweetwater Creek at U.S. Highway 29 near Luxomni, Georgia

Swift Creek

Headwaters to Yellow River

02207200

Swift Creek at Conyers Street near Lithonia, Georgia

Tobesofkee Creek

Cole Creek to Todd Creek

02213300

Tobesofkee Creek at Parks Road near Forsyth, Georgia

Tobesofkee Creek

Lake Tobesofkee to Rocky Creek

02213560

Tobesofkee Creek - U.S. Highways 41 and 129

Town Branch

D/S Jackson S. WPCP to Aboothlacoosta Cr.

02211110

Town Branch at James Moore Drive (County Road 262) near Jackson, Georgia

Turkey Creek

Headwaters to Yellow River

02206448

Turkey Creek at Martin Nash Road near Snellville, Georgia

Turnpike Creek

Hwy 280 to Sugar Creek

02216187

Turnpike Creek at Cedar Park Dowdyville Road near Lumber City, Georgia

Tussahaw Creek

Wolf Creek to Lake Jackson

02209750

Tussahaw Creek at Fincherville Road near Stark, Georgia

Walnut Creek

Headwaters to Ocmulgee River

02213055 02213110

Walnut Creek at McKay Road (County Road 11) near Clinton, Georgia and Walnut Creek at US Highway 80 near Macon, Georgia

Watson Creek

Headwaters to Yellow River

02206470

Watson Creek at High Point Road near Snellville, Georgia

Wise Creek

Headwaters to Kinnard Creek

02210998

Wise Creek at Concord Road (County Road 141) near Monticello, Georgia

Yellow River

Big Haynes Creek to Jackson Lake

02208005

Yellow River - Georgia Highway 212

Yellow River

Hwy 124 to Big Haynes Creek

02207300

Yellow River - Conyers Water Intake

Yellow River

Sweetwater Creek to Hwy 124

02206500

Yellow River - Killian Hill Road

Yellow Water Creek 1 mile d/s Stark Road

02210780

Yellow Water Creek at State Road 16 near Jackson, Georgia

Lake Jackson

Newton, Butts, and Jasper Counties

04350051*

Lake Jackson downstream from Alcovy River confluence

*Georgia monitoring station number; no corresponding USGS station

Table 4 CY 1999 Water Quality Monitoring Data

Stream/Segment
Alcovy River (Cedar Creek to Bay Creek)
Alligator Creek (Batson Creek to Lime Sink Creek)
Almand Branch (Tanyard Branch to Snapping Shoals)
Bay Creek (Headwaters to Beaver Creek) Beaver Ruin Creek (Gwinnett County) Big Cotton Indian Cr. (Panther Creek to Brush Creek)
Big Flat Creek (Headwaters to Flat Creek)
Big Haynes Creek (Brushy Creek to Little Panther Creek) Big Haynes Creek (Headwaters to Brushy Creek)

Sample Period
02/12/1999 02/16/1999 02/22/1999 03/05/1999 04/06/1999 04/15/1999 04/22/1999 04/28/1999 02/11/1999 02/17/1999 02/23/1999 03/03/1999 01/19/1999 01/27/1999 02/02/1999 02/18/1999

Geometric Mean
(#/100 ml.) 47
756
110
26424

Sample Period
04/08/1999 04/13/1999 04/20/1999 04/29/1999 05/20/1999 05/27/1999 06/10/1999 06/17/1999 04/07/1999 04/12/1999 04/19/1999 04/28/1999 04/01/1999 04/14/1999 04/21/1999 04/28/1999

NA

NA

NA

02/11/1999

04/07/1999

02/17/1999 02/23/1999

234

04/12/1999 04/19/1999

03/03/1999

04/28/1999

02/12/1999 02/16/1999 02/22/1999

130

04/08/1999 04/13/1999 04/20/1999 04/29/1999

2/12/1999

6/10/1999

2/16/1999 2/22/1999

185

6/17/1999 6/24/1999

3/05/1999

07/08/1999

NA

NA

NA

Geometric Mean
(#/100 ml.)
74

Sample Period
06/10/1999 06/17/1999 06/24/1999 07/08/1999

Geometric Mean
(#/100 ml.)
384

Sample Period
09/09/1999 09/23/1999 09/30/1999 10/07/1999

658

06/09/1999

09/08/1999

126

06/16/1999 06/23/1999

1037

09/22/1999 09/29/1999

07/07/1999

10/06/1999

06/23/1999

09/22/1999

2929

06/30/1999 07/14/1999

21218

09/29/1999 10/05/1999

07/21/1999

10/20/1999

NA

NA

NA

NA

06/09/1999

09/08/1999

435

06/16/1999 06/23/1999

492

09/22/1999 09/29/1999

07/07/1999

10/06/1999

06/10/1999

09/09/1999

1797

06/17/1999 06/24/1999

1303

09/23/1999 09/30/1999

07/08/1999

10/07/1999

306

NA

NA

NA

NA

NA

NA

NA

Geometric Mean
(#/100 ml.) 359
373 2480 NA 1826 761 NA NA

Stream/Segment Big Haynes Creek (Little Haynes Creek to Yellow River)
Big Indian Creek (Mossy Creek to Ocmulgee River)
Big Sandy Creek (Aboothlacoosta Creek to Ocmulgee River)
Bromolow Creek (Headwaters to Beaver Ruin Creek)
Cabin Creek (Headwaters Griffin to Towaliga River)
Camp Creek (Headwaters to Jackson Creek)
Cedar Creek (Headwaters to Alcovy River)
Cobbs Creek (Headwaters to Shoal Creek)
Conley Creek (Headwaters to South River)

Sample Period
NA

Geometric Mean
(#/100 ml.)
NA

Sample Period
NA

01/19/1999

04/01/1999

01/27/1999 02/02/1999

194

04/14/1999 04/21/1999

02/18/1999

04/28/1999

01/21/1999

03/30/1999

01/26/1999 02/04/1999

196

04/13/1999 04/20/1999

04/16/1999

04/27/1999

03/09/1999

05/03/1999

03/15/1999 03/18/1999

55

05/12/1999 05/18/1999

03/24/1999

06/02/1999

02/25/1999

04/06/1999

03/01/1999 03/08/1999

133

04/14/1999 04/21/1999

03/11/1999

04/27/1999

03/09/1999

03/03/1999

03/15/1999 03/18/1999

237

03/12/1999 03/18/1999

03/24/1999

06/02/1999

03/09/1999

05/03/1999

03/15/1999 03/18/1999

81

05/12/1999 05/18/1999

03/24/1999

06/02/1999

03/10/1999

05/04/1999

03/16/1999 03/22/1999

407

05/13/1999 05/17/1999

03/25/1999

05/19/1999

03/10/1999

05/04/1999

03/16/1999 03/22/1999

119

05/13/1999 05/17/1999

03/25/1999

05/19/1999

Geometric Mean
(#/100 ml.)

Sample Period

Geometric Mean
(#/100 ml.)

Sample Period

NA

NA

NA

NA

60

06/23/1999 06/30/1999 07/14/1999 07/21/1999

341

09/22/1999 09/29/1999 10/05/1999 10/20/1999

06/22/1999

09/21/1999

58

06/29/1999 07/13/1999

332

29/28/1999 10/06/1999

07/20/1999

10/19/1999

07/06/1999

11/01/1999

149

07/19/1999 07/22/1999

1671

11/04/1999 11/15/1999

07/28/1999

11/18/1999

06/08/1999

09/07/1999

305

06/15/1999 06/22/1999

656

09/21/1999 09/28/1999

07/06/1999

10/05/1999

07/06/1999

11/01/1999

229

07/19/1999 07/22/1999

465

11/04/1999 11/15/1999

07/28/1999

11/18/1999

07/06/1999

11/01/1999

80

07/19/1999 07/22/1999

222

11/04/1999 11/15/1999

07/28/1999

11/18/1999

07/07/1999

11/02/1999

979

07/20/1999 07/26/1999

2029

11/08/1999 11/16/1999

0729/1999

11/22/1999

07/07/1999

11/02/1999

503

07/20/1999 07/26/1999

411

11/08/1999 11/16/1999

07/29/1999

11/22/1999

Geometric Mean
(#/100 ml.) NA 83
258
264
982
125
53
350
300

Stream/Segment
Doless Creek (Headwaters to Doolittle Creek)
Doolittle Creek (Headwaters to South River)
Falling Creek (Little Falling Creek to Ocmulgee River)
Honey Creek (Headwaters to South River)
Hopkins Creek (Headwaters to Alcovy River)
House Creek (Ball Creek to Little House Creek)
Intrenchment Creek (Headwaters to South River)
Jacks Creek (Headwaters to Yellow River)

Sample Period
03/10/1999 03/16/1999 03/22/1999 03/25/1999 07/07/1999 07/20/1999 07/26/1999 07/29/1999 01/21/1999 01/26/1999 02/04/1999 02/16/1999 02/25/1999 03/01/1999 03/08/1999 03/11/1999 03/09/1999 03/15/1999 03/18/1999 03/24/199 04/06/1999 04/15/1999 04/22/199 04/28/1999 03/10/1999 03/16/1999 03/22/1999 03/25/1999 03/11/1999 03/17/1999 03/23/1999 04/08/1999

Geometric Mean
(#/100 ml.) 182
625
153
253
79
155
114
88

Sample Period
05/04/1999 05/13/1999 05/17/1999 05/19/1999 11/02/1999 11/08/1999 11/16/1999 11/22/1999 03/30/1999 04/13/1999 04/20/1999 04/27/1999 04/06/1999 04/14/1999 04/21/1999 04/27/1999 05/03/1999 05/12/1999 05/18/1999 06/02/1999 07/29/1999 08/12/1999 08/19/1999 08/26/1999 05/04/1999 05/13/1999 05/17/1999 05/19/1999 05/06/1999 05/17/1999 05/20/1999 06/03/1999

Geometric Mean
(#/100 ml.)

Sample Period

Geometric Mean
(#/100 ml.)

Sample Period

6901

NA

NA

NA

221

NA

NA

NA

06/22/1999

09/21/1999

114

06/29/1999 07/13/1999

223

09/28/1999 10/06/1999

07/20/1999

10/19/1999

06/08/1999

09/07/1999

333

06/15/1999 06/22/1999

409

09/21/1999 09/28/1999

07/06/1999

10/05/1999

07/06/1999

11/01/1999

288

07/19/1999 07/22/1999

259

11/04/1999 11/15/1999

07/28/1999

11/18/1999

402

NA

NA

NA

07/07/1999

11/02/1999

915

07/20/1999 07/26/1999

2293

11/08/1999 11/16/1999

07/29/1999

11/22/1999

07/08/1999

11/03/1999

3137

07/21/1999 07/27/1999

1218

11/09/1999 11/17/1999

08/02/1999

11/23/1999

Geometric Mean
(#/100 ml.) NA
NA
241
742
39
NA
485
401

Stream/Segment
Jackson Creek (Gwinnett County)
Little Haynes Creek (Hwy 20 to Big Haynes Creek)
Little Stone Mountain Creek (Headwaters to Stone Mountain Lake)
Little Suwanee Creek (Tributary to Yellow River)
McClain Branch (Headwaters to Honey Creek)
No Business Creek (Headwaters to Norris Lake) North Branch South River (Atlanta) Ocmulgee River (Beaverdam Creek to Walnut Creek)
Ocmulgee River (Sandy Run Creek to Big Indian Creek)

Sample Period
03/09/1999 03/15/1999 03/18/1999 03/24/1999 02/12/1999 02/16/1999 02/22/1999 03/05/1999 03/11/1999 03/17/1999 03/23/1999 04/08/1999 03/09/1999 03/15/1999 03/18/1999 03/24/1999 03/10/1999 03/16/1999 03/22/1999 03/25/1999 03/11/1999 03/17/1999 03/23/1999 04/08/1999

Geometric Mean
(#/100 ml.) 161
70
105
182
759
82

Sample Period
05/03/1999 05/12/1999 05/18/1999 06/02/1999 04/08/1999 04/13/199 04/20/1999 04/29/1999 05/06/1999 05/17/1999 05/20/1999 06/03/1999 05/03/1999 05/12/1999 05/18/1999 06/02/1999 05/04/1999 05/13/1999 05/17/1999 05/19/1999 05/06/1999 05/17/1999 05/20/1999 06/03/1999

NA

NA

NA

01/20/1999

03/31/1999

01/28/1999 02/03/1999

123

04/15/1999 04/22/1999

02/17/1999

04/29/1999

01/19/1999

04/01/1999

01/27/1999 02/02/1999

169

04/14/1999 04/21/1999

02/18/1999

04/28/1999

Geometric Mean
(#/100 ml.) 151
252
708
911
374
349 NA 34
57

Sample Period
07/06/1999 07/19/1999 07/22/1999 07/28/1999 07/10/1999 07/17/1999 07/24/1999 08/08/1999 0708/1999 0721/1999 0727/1999 08/02/1999 07/06/1999 07/19/1999 07/22/1999 07/28/1999 07/07/1999 07/20/1999 07/26/1999 07/29/1999 07/08/1999 07/21/1999 07/27/1999 08/02/1999
NA
06/24/1999 07/01/1999 07/15/1999 07/22/1999 06/23/1999 06/30/1999 07/14/1999 07/21/1999

Geometric Mean
(#/100 ml.) 535
252
446
1451
633
224 NA 203
267

Sample Period
11/01/1999 11/04/1999 11/15/1999 11/18/1999 09/09/1999 09/23/1999 09/30/1999 10/07/1999 11/03/1999 11/09/1999 11/17/1999 11/23/1999 11/01/1999 11/04/1999 11/15/1999 11/18/1999 11/02/1999 11/08/1999 11/16/1999 11/22/1999 11/03/1999 11/09/1999 11/17/1999 11/23/1999
NA
09/23/1999 09/30/1999 10/07/1999 10/21/1999 09/22/1999 09/29/1999 10/05/1999 10/20/1999

Geometric Mean
(#/100 ml.) 181
409
292
500
548
72 NA 51
89

Stream/Segment
Ocmulgee River (Tobesofkee Creek to Echeconnee Creek)
Pew Creek (Gwinnett County) Rocky Creek (1 mile u/s Rocky Cr. Rd. to Tobesofkee Cr.) Shetley Creek (Headwaters to Bromolow Creek)
Shoal Creek (Headwaters to Alcovy River)
Shoal Creek (Headwaters to South River)
Snapfinger Creek (Dekalb County)
Snapping Shoals Creek (Almand Branch to South River)
South River (Atlanta to Flakes Mill Road)

Sample Period
01/20/1999 01/28/1999 02/03/1999 02/17/1999 03/09/1999 03/15/1999 03/18/1999 03/24/1999

Geometric Mean
(#/100 ml.)
133
55

Sample Period
03/31/1999 04/15/1999 04/22/1999 04/29/1999 05/03/1999 05/12/1999 05/18/1999 06/02/1999

NA

NA

NA

03/09/1999

05/03/1999

03/15/1999 03/18/1999

230

05/12/1999 05/18/1999

03/24/1999

06/02/1999

03/09/1999

05/03/1999

03/15/1999 03/18/1999

401

05/12/1999 05/18/1999

03/24/1999

06/02/1999

03/10/1999

05/04/1999

03/16/1999 03/22/1999

636

05/13/1999 05/17/1999

03/25/1999

05/19/1999

02/11/1999

04/07/1999

02/17/1999 02/23/1999

302

04/12/1999 04/19/1999

03/03/1999

04/28/1999

03/10/1999

05/04/1999

03/16/1999 03/22/1999

142

05/13/1999 05/17/1999

03/25/1999

05/19/1999

02/11/1999

04/07/1999

02/17/1999 02/23/1999

231

04/12/1999 04/19/1999

03/03/1999

04/28/1999

Geometric Mean
(#/100 ml.) 30
149 NA 582
337
1931
708
1026
1647

Sample Period
06/24/1999 07/01/1999 07/15/1999 07/22/1999 07/06/1999 07/19/1999 07/22/1999 07/28/1999
NA
06/06/1999 06/19/1999 06/22/1999 06/28/1999 07/06/1999 07/19/1999 07/22/1999 07/28/1999 06/07/1999 06/20/1999 06/26/1999 06/29/1999 06/09/1999 06/16/1999 06/23/1999 07/07/1999 07/07/1999 07/20/1999 07/26/1999 07/29/1999 06/09/1999 06/16/1999 06/23/1999 07/07/1999

Geometric Mean
(#/100 ml.) 306
557 NA 1955
480
2929
1102
751
5438

Sample Period
09/23/1999 09/30/1999 10/07/1999 10/21/1999 11/01/1999 11/04/1999 11/15/1999 11/18/1999
NA
11/01/1999 11/04/1999 11/15/1999 11/18/1999 11/01/1999 11/04/1999 11/15/1999 11/18/1999 11/02/1999 11/08/1999 11/16/1999 11/22/1999 09/08/1999 09/22/1999 09/29/1999 10/06/1999 11/08/1999 11/16/1999 11/22/1999 11/29/1999 09/08/1999 09/22/1999 09/29/1999 10/06/1999

Geometric Mean
(#/100 ml.) 85
289 NA 719
227
5630
825
61
4440

Stream/Segment
South River (Flakes Mill Road to Pole Bridge Creek)
South River (Hwy 20 to Snapping Shoals Creek)
South River (Pole Bridge Creek to Hwy 20)
South River (Snapping Shoals to Jackson Lake)
Stone Mountain Creek (Headwaters to Stone Mountain Lake)
Sugar Creek (U/s Memorial Drive to South River)
Sweetwater Creek (Lee Daniel Creek to Yellow River)
Swift Creek (Headwaters to Yellow River)

Sample Period
02/11/1999 02/17/1999 02/23/1999 03/03/1999 01/07/1999 01/13/1999 01/20/1999 02/04/1999 02/11/1999 02/17/1999 02/23/1999 03/03/1999 01/04/1999 01/21/1999 01/25/1999 02/03/1999 03/11/1999 03/17/1999 03/23/1999 04/08/1999 02/11/1999 02/17/199 02/23/1999 03/03/1999 02/12/1999 02/16/1999 02/22/1999 03/05/1999 03/11/1999 03/17/1999 03/23/1999 04/08/1999

Geometric Mean
(#/100 ml.) 578
199
152
184
63
570
142
358

Sample Period
04/07/1999 04/12/1999 04/19/1999 04/28/1999 04/06/1999 04/14/1999 04/21/1999 04/27/1999 04/07/1999 04/12/1999 04/19/1999 04/28/1999 05/06/1999 05/11/1999 05/18/1999 06/03/1999 05/06/1999 05/17/1999 05/20/1999 06/03/1999 04/07/1999 04/12/1999 04/19/1999 04/28/1999 04/08/1999 04/13/1999 04/20/1999 04/29/1999 05/06/1999 05/17/1999 05/20/1999 06/03/1999

Geometric Mean
(#/100 ml.) 752
330
416
198.4
373
2024
224
1920

Sample Period
06/09/1999 06/16/1999 06/23/1999 07/07/1999 06/08/1999 06/15/1999 06/22/1999 07/06/1999 06/09/1999 06/16/1999 06/23/1999 07/07/1999 09/03/1999 09/15/1999 09/22/1999 09/30/1999 07/08/1999 07/21/1999 07/27/1999 08/02/1999 06/09/1999 06/16/1999 06/23/1999 07/07/1999 06/10/1999 06/17/1999 06/24/1999 07/08/1999 07/08/1999 07/21/1999 07/27/1999 08/02/1999

Geometric Mean
(#/100 ml.) 652
164
345
411.8
307
1032
955
657

Sample Period
09/08/1999 09/22/1999 09/29/1999 10/06/1999 09/07/1999 09/21/1999 09/28/1999 10/05/1999 09/08/1999 09/22/1999 09/29/1999 10/06/1999 11/19/1999 11/22/1999 12/08/1999 12/15/1999 11/03/1999 11/09/1999 11/17/1999 11/23/1999 09/08/1999 09/22/1999 09/29/1999 10/06/1999 09/09/1999 09/23/1999 09/30/1999 10/07/1999 11/03/1999 11/09/1999 11/17/1999 11/23/1999

Geometric Mean
(#/100 ml.) 1207
584
1270
80.6
70
1519
460
276

Stream/Segment
Tobesofkee Creek (Cole Creek to Todd Creek)
Tobesofkee Creek (Lake Tobesofkee to Rocky Creek) Town Branch (D/S Jackson S. WPCP to Aboothlacoosta Cr.) Turkey Creek (Headwaters to Yellow River)
Turnpike Creek (Hwy 280 to Sugar Creek)
Tussahaw Creek (Wolf Creek to Lake Jackson)
Walnut Creek (Headwaters to Ocmulgee River)
Watson Creek (Headwaters to Yellow River)
Wise Creek (Headwaters to Kinnard Creek)

Sample Period
01/21/1999 01/26/1999 02/04/1999 02/16/1999 01/20/1999 01/28/1999 02/03/1999 02/17/1999

Geometric Mean
(#/100 ml.)
317
69

Sample Period
03/30/1999 04/13/1999 04/20/1999 04/27/1999 03/31/1999 04/15/1999 04/22/1999 04/29/1999

Geometric Mean
(#/100 ml.)
85
50

Sample Period
06/22/1999 06/29/1999 07/13/1999 07/20/1999 06/24/1999 07/01/1999 07/15/1999 07/22/1999

Geometric Mean
(#/100 ml.)
1370
178

Sample Period
09/21/1999 09/28/1999 10/06/1999 10/19/1999 09/23/1999 09/30/1999 10/07/1999 10/21/1999

Geometric Mean
(#/100 ml.)
205
454

NA

NA

NA

NA

NA

NA

NA

NA

03/11/1999

03/06/1999

07/08/1999

11/03/1999

03/17/1999 03/23/1999

46

03/17/1999 03/20/1999

976

07/21/1999 07/27/1999

649

11/09/1999 11/17/1999

356

04/08/1999

04/03/1999

08/02/1999

11/23/1999

04/01/1999

04/08/1999 04/14/1999

441

NA

NA

NA

NA

NA

NA

04/21/1999

01/07/1999

04/06/1999

06/08/1999

09/07/1999

01/13/1999 01/20/1999

138

04/14/1999 04/21/1999

340

06/15/1999 06/22/1999

302

09/21/1999 09/28/1999

2227

02/04/1999

04/27/1999

07/06/1999

10/05/1999

01/20/1999

03/31/1999

06/24/1999

09/23/1999

01/28/1999 02/03/1999

1149

04/15/1999 04/22/1999

264

07/01/1999 07/15/1999

330

09/30/1999 10/07/1999

159

02/17/1999

04/29/1999

07/22/1999

10/21/1999

03/11/1999

05/06/1999

07/08/1999

11/03/1999

03/17/1999 03/23/1999

40

05/17/1999 05/20/1999

669

07/21/1999 07/27/1999

611

11/09/1999 11/17/1999

70

04/08/1999

06/03/1999

08/02/1999

11/23/1999

01/21/1999

03/30/1999

06/22/1999

09/21/1999

01/26/1999 02/04/1999

114

04/13/1999 04/20/1999

140

06/29/1999 07/13/1999

309

09/28/1999 10/06/1999

334

02/16/1999

04/27/1999

07/20/1999

10/19/1999

Stream/Segment
Yellow River (Big Haynes Creek to Jackson Lake)
Yellow River (Hwy 124 to Big Haynes Creek)
Yellow River (Sweetwater Creek to Hwy 124)
Yellow Water Creek (1 mile d/s Stark Road)
Lake Jackson (Newton, Butts, and Jasper Counties) NA = 1999 Sampling Data Not Available

Sample Period
01/07/1999 01/13/1999 01/20/1999 02/04/1999

Geometric Mean
(#/100 ml.)
265

Sample Period
04/06/1999 04/14/1999 04/21/1999 04/27/1999

NA

NA

NA

02/12/1999

04/08/1999

02/16/1999 02/22/1999

111

04/13/1999 04/20/1999

03/05/1999

04/29/1999

01/21/1999

03/30/1999

01/26/1999 02/04/1999

454

04/13/1999 04/20/1999

02/16/1999

04/27/1999

NA

NA

NA

Geometric Mean
(#/100 ml.) 92
NA
134
47
NA

Sample Period
06/08/1999 06/15/1999 06/22/1999 07/06/1999
NA
06/10/1999 06/17/1999 06/24/1999 07/08/1999 06/22/1999 06/29/1999 07/13/1999 07/20/1999
NA

Geometric Mean
(#/100 ml.) 288
NA
908
1072
NA

Sample Period
09/07/1999 09/21/1999 09/28/1999 10/05/1999
NA
09/09/1999 09/23/1999 09/30/1999 10/07/1999 09/21/1999 09/28/1999 10/06/1999 10/19/1999
NA

Geometric Mean
(#/100 ml.) 929
NA
329
226
NA

Table 5 NPDES Facilities Discharging Fecal Coliform in the Ocmulgee River Basin

Facility Name
Alamo Pond Amercord Inc Atlanta Custer Ave. CSO Atlanta Intrenchment Cr CSO Atlanta McDaniel St. CSO Barnesville Gordon Road Cadwell WPCP Cagle's Inc Perry Clayton Co Northeast WPCP Cochran WPCP DeKalb Co Polebridge WPCP DeKalb Co Snapfinger WPCP DNR High Falls State Park DOT Rest Area #14 DOT Rest Area #22 Eastman Roach Branch WPCP Forsyth Northeast Forsyth South Fort Valley WPCP Georgia Power Arkwright Griffin Cabin Creek Gwinnett Co Beaver Ruin Creek Gwinnett Co Big Haynes Creek Gwinnett Co Jacks Creek Gwinnett Co Jackson Creek Gwinnett Co No Business Creek Gwinnett Co Yellow River Hawkinsville South Helena WPCP Henry Co Camp Creek Henry Co Hudson Bridge WPCP Henry Co Panola Woods WPCP Jackson Northeast Jackson Southside Jackson Yellow Water Creek Locust Grove East Pond Locust Grove Skyland MHP Locust Grove West Pond Loganville WPCP Macon Poplar Street Macon Rocky Creek

NPDES Permit No.
GA0021440 GA0026735 GA0037141 GA0037168 GA0037133 GA0021041 GA0025887 GA0002844 GA0020575 GA0032107 GA0026816 GA0024147 GA0048135 GA0023612 GA0023591 GA0026310 GA0031801 GA0024732 GA0031046 GA0026069 GA0020214 GA0032841 GA0033847 GA0047627 GA0030732 GA0023973 GA0047911 GA0020338 GA0048674 GA0049352 GA0034711 GA0049808 GA0032719 GA0023931 GA0021831 GA0049760 GA0049816 GA0049778 GA0020788 GA0024538 GA0024546

1999 Discharge Monitoring Reports

Avg. Flow (MGD)

Avg. Fecal
Coliform Loadinga
(counts/hr)

No data available

No data available

No data available

No data available

No data available

0.85

7.88E+07

No data available

No data available

3.98

1.79E+08

No data available

9.55

0.00E+00

20.58

1.71E+08

No data available

No data available

No data available

No data available

No data available

0.28

4.83E+05

1.47

3.56E+08

No data available

1.05

1.02E+07

4.40

1.62E+07

0.24

1.34E+06

0.50

2.44E+06

2.86

6.79E+06

0.84

5.24E+06

10.21

3.80E+07

0.80

7.18E+07

No data available

1.02

4.85E+07

0.46

4.64E+07

0.08

2.46E+06

No data available

0.28

1.30E+06

0.20

2.73E+05

0.03

0.00E+00

0.13

2.69E+07

0.10

0.00E+00

0.41

2.67E+06

15.13

5.85E+08

20.48

7.60E+08

NPDES Permit Limits

Avg. Flow (MGD)
0.07 0.50

Avg. Fecal Coliform Loadingb (counts/hr)
2.21E+07 1.58E+08

1.20 0.05 3.50 6.00 0.60 20.00 36.00 0.02 0.025 0.045 0.90 1.40 0.60 2.20 480.85 1.50 4.50 0.50 1.00 3.00 1.00 12.00 1.30 0.30 1.50 0.40 0.001 0.038 0.70 0.75 0.05 0.20 0.05 0.575 20.00 24.00

3.79E+08 1.58E+07 1.11E+09 1.90E+09 1.90E+08 6.32E+09 1.14E+10 6.32E+06 7.90E+06 1.42E+07 2.84E+08 4.42E+08 1.90E+08 6.95E+08 1.52E+11 4.74E+08 1.42E+09 1.58E+08 3.16E+08 9.48E+08 3.16E+08 4.74E+08 4.11E+08 9.48E+07 4.74E+08 1.26E+08 3.16E+05 1.20E+07 2.21E+08 2.37E+08 1.58E+07 6.32E+07 1.64E+07 1.82E+08 6.32E+09 7.58E+09

Facility Name
McRae Gum Swamp Middle GA Nursing Home Perry WPCP Rockdale Co Almand WPCP Rockdale Co Honey Creek Rockdale Co Quigg Branch Rockdale Co Scott Creek Rockdale Co Snapping Shoals Scotland Pond Spring Industries Inc Stockbridge WPCP USAF Robins AFB Warner Robins Sandy Run Creek William Carter Co

NPDES Permit No.
GA0026298 GA0049280 GA0021334 GA0021610 GA0022659 GA0047678 GA0026239 GA0023035 GA0032344 GA0003409 GA0023337 GA0002852 GA0030325 GA0003115

1999 Discharge Monitoring Reports

Avg. Flow (MGD)

Avg. Fecal
Coliform Loadinga
(counts/hr)

No data available

No data available

2.02

2.52E+08

0.90

7.74E+06

0.22

4.84E+06

2.80

1.53E+07

0.22

3.06E+07

0.35

3.42E+06

No data available

1.02

5.29E+07

0.51

2.66E+06

No data available

5.60

9.99E+07

No data available

NPDES Permit Limits

Avg. Flow (MGD)
0.07 0.02 3.00 1.25 0.30 4.00 0.22 0.45 0.18 1.00 1.50 2.10 9.00 1.30

Avg. Fecal Coliform Loadingb (counts/hr)
2.21E+07 5.37E+06 9.48E+08 3.95E+08 9.48E+07 1.26E+09 6.95E+07 1.42E+08 5.69E+07 6.32E+08 4.74E+08 6.64E+08 2.84E+09 4.11E+08

a Loadings based on CY 1999 average fecal coliform concentration and mean flow reported on DMRs. b Loadings based on Monthly Average fecal coliform permit limit at monthly average permitted flow (design flow used
for facilities without a permitted monthly flow limit). A fecal coliform loading of 200 counts/100 mL was assumed for facilities without a fecal coliform bacteria permit limit.

Table 6 Livestock Distribution In Ocmulgee River Basin

Stream/Segment
Alcovy River - (Cedar Creek to Bay Creek) Alligator Creek - (Batson Creek to Lime Sink Creek) Almand Branch - (Tanyard Branch to Snapping Shoals) Bay Creek - (Headwaters to Beaver Creek) Beaver Ruin Creek - (Gwinnett County) Big Cotton Indian Creek (Panther Creek to Brush Creek) Big Flat Creek - (Headwaters to Flat Creek) Big Haynes Creek - (Brushy Creek to Little Panther Creek) Big Haynes Creek - (Headwaters to Brushy Creek) Big Haynes Creek - (Little Haynes Creek to Yellow River) Big Indian Creek - (Mossy Creek to Ocmulgee River) Big Sandy Creek (Aboothlacoosta Creek to Ocmulgee River) Bromolow Creek - (Headwaters to Beaver Ruin Creek) Cabin Creek - (Headwaters Griffin to Towaliga River) Camp Creek - (Headwaters to Jackson Creek) Cedar Creek - (Headwaters to Alcovy River) Cobbs Creek - (Headwaters to Shoal Creek) Conley Creek - (Headwaters to South River) Doless Creek - (Headwaters to Doolittle Creek) Doolittle Creek - (Headwaters to South River) Falling Creek - (Little Falling Creek to Ocmulgee River)

Beef Cow 47 TBD
0 TBD
0 10 388 21 19 371 TBD
TBD
0 TBD
6 5 0 66 0 1 TBD

Milk Cow 0

Cattle 907

Livestock Chicken Layers
1252

ChickensBroilers
Sold
403475

Hogs 6

TBD

TBD

TBD

TBD

TBD

0

58

9

0

0

TBD

TBD

TBD

TBD

TBD

0

0

0

0

0

0

20

0

1

5

3

855

10267

609696

14

0

960

555

404755

5

0

944

505

399636

5

3

1839

9023

894826

18

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0

0

0

66

0

TBD

TBD

TBD

TBD

TBD

0

17

0

1883

0

0

164

143

70597

1

0

0

0

0

0

0

129

0

0

0

0

0

0

0

0

0

2

0

0

0

TBD

TBD

TBD

TBD

TBD

Sheep
5 TBD
10 TBD
0 8 10 6 5 41 TBD
TBD
0 TBD
0 1 0 0 0 0 TBD

Stream/Segment
Honey Creek - (Headwaters to South River) Hopkins Creek - (Headwaters to Alcovy River) House Creek - (Ball Creek to Little House Creek) Intrenchment Creek (Headwaters to South River) Jacks Creek - (Headwaters to Yellow River) Jackson Creek - (Gwinnett County) Little Haynes Creek - (Hwy 20 to Big Haynes Creek) Little Stone Mountain Creek(Headwaters to Stone Mtn Lake) Little Suwanee Creek - (Tributary to Yellow River) McClain Branch - (Headwaters to Honey Creek) No Business Creek (Headwaters to Norris Lake) North Branch South River (Atlanta) Ocmulgee River - (Beaverdam Creek to Walnut Creek) Ocmulgee River - (Sandy Run Creek to Big Indian Creek) Ocmulgee River - (Tobesofkee Creek to Echeconnee Creek) Pew Creek - (Gwinnett County) Rocky Creek - (1 mile u/s Rocky Creek Rd. - Tobesofkee Cr.) Shetley Creek - (Headwaters to Bromolow Creek) Shoal Creek - (Headwaters to Alcovy River) Shoal Creek - (Headwaters to South River) Snapfinger Creek - (Dekalb County) Snapping Shoals Creek (Almand Branch to South River) South River - (Atlanta to Flakes Mill Road) South River - (Flakes Mill Road to Pole Bridge Creek)

Beef Cow 65
0 TBD
1 0 0 306 2 0 0 0 1 TBD TBD TBD 0 TBD 0 0 5 4 341 92 69

Milk Cow 0

Cattle 367

Livestock Chicken Layers
0

ChickensBroilers
Sold
38

Hogs 0

0

84

0

34404

0

TBD

TBD

TBD

TBD

TBD

0

2

0

0

0

0

1

0

266

0

0

8

0

3301

0

3

625

7403

422454

11

0

3

0

0

0

0

24

0

9858

0

0

33

5

0

0

0

178

1

69827

1

0

2

0

0

0

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0

79

0

32455

0

TBD

TBD

TBD

TBD

TBD

0

0

0

0

0

0

93

0

37971

0

0

9

0

0

0

0

8

0

0

0

15

800

25

61738

10

0

182

0

0

0

0

211

4

0

0

Sheep
42 0 TBD 0 0 0 9 0 0 6 2 0 TBD TBD TBD 0 TBD 0 0 0 0 28 0 5

Stream/Segment
South River - (Hwy 20 to Snapping Shoals Creek) South River - (Pole Bridge Creek to Hwy 20) South River - (Snapping Shoals to Jackson Lake) Stone Mountain Creek (Headwaters to Stone Mountain Lake) Sugar Creek - (U/s Memorial Drive to South River) Sweetwater Creek - (Lee Daniel Creek to Yellow River) Swift Creek - (Headwaters to Yellow River) Tobesofkee Creek - (Cole Creek to Todd Creek) Tobesofkee Creek - (Lake Tobesofkee to Rocky Creek) Town Branch - (D/S Jackson S. WPCP to Aboothlacoosta Cr.) Turkey Creek - (Headwaters to Yellow River) Turnpike Creek - (Hwy 280 to Sugar Creek) Tussahaw Creek - (Wolf Creek to Lake Jackson) Walnut Creek - (Headwaters to Ocmulgee River) Watson Creek - (Headwaters to Yellow River) Wise Creek - (Headwaters to Kinnard Creek) Yellow River - (Big Haynes Creek to Jackson Lake) Yellow River - (Hwy 124 to Big Haynes Creek) Yellow River - (Sweetwater Creek to Hwy 124) Yellow Water Creek - (1 mile d/s Stark Road) Lake Jackson - (Newton, Butts, and Jasper Counties)

Beef Cow 743 353 223
0
0 0 61 TBD TBD TBD 0 TBD TBD TBD 0 TBD 2133 190 8 TBD TBD

Milk Cow 19

Cattle 5539

Livestock Chicken Layers
26

ChickensBroilers
Sold
77802

Hogs 24

0

1416

77

1558

1

14

927

0

19139

5

0

0

0

0

0

0

1

0

0

0

0

0

0

82366

1

0

119

0

0

0

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0

9

0

3589

0

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0

10

0

3988

0

TBD

TBD

TBD

TBD

TBD

52

8296

22343

3037747

79

0

1281

43

263779

2

0

488

0

192690

1

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

Sheep
48 87 2
0
0 1 0 TBD TBD TBD 0 TBD TBD TBD 0 TBD 119 47 1 TBD TBD

TBD = To Be Determined

Table 7 Estimated Number of Septic Systems In Ocmulgee River Basin

Stream/Segment
Alcovy River - (Cedar Creek to Bay Creek) Alligator Creek - (Batson Creek to Lime Sink Creek) Almand Branch - (Tanyard Branch to Snapping Shoals) Bay Creek - (Headwaters to Beaver Creek) Beaver Ruin Creek - (Gwinnett County) Big Cotton Indian Creek - (Panther Creek to Brush Creek) Big Flat Creek - (Headwaters to Flat Creek) Big Haynes Creek - (Brushy Creek to Little Panther Creek) Big Haynes Creek - (Headwaters to Brushy Creek) Big Haynes Creek - (Little Haynes Creek to Yellow River) Big Indian Creek - (Mossy Creek to Ocmulgee River) Big Sandy Creek - (Aboothlacoosta Creek to Ocmulgee River) Bromolow Creek - (Headwaters to Beaver Ruin Creek) Cabin Creek - (Headwaters Griffin to Towaliga River) Camp Creek - (Headwaters to Jackson Creek) Cedar Creek - (Headwaters to Alcovy River) Cobbs Creek - (Headwaters to Shoal Creek) Conley Creek - (Headwaters to South River) Doless Creek - (Headwaters to Doolittle Creek) Doolittle Creek - (Headwaters to South River) Falling Creek - (Little Falling Creek to Ocmulgee River) Honey Creek - (Headwaters to South River) Hopkins Creek - (Headwaters to Alcovy River) House Creek - (Ball Creek to Little House Creek) Intrenchment Creek - (Headwaters to South River) Jacks Creek - (Headwaters to Yellow River) Jackson Creek - (Gwinnett County) Little Haynes Creek - (Hwy 20 to Big Haynes Creek) Little Stone Mountain Creek- (Headwaters to Stone Mountain Lake) Little Suwanee Creek - (Tributary to Yellow River) McClain Branch - (Headwaters to Honey Creek) No Business Creek - (Headwaters to Norris Lake) North Branch South River - (Atlanta) Ocmulgee River - (Beaverdam Creek to Walnut Creek) Ocmulgee River - (Sandy Run Creek to Big Indian Creek) Ocmulgee River - (Tobesofkee Creek to Echeconnee Creek) Pew Creek - (Gwinnett County) Rocky Creek - (1 mile u/s Rocky Creek Rd. - Tobesofkee Cr.) Shetley Creek - (Headwaters to Bromolow Creek) Shoal Creek - (Headwaters to Alcovy River) Shoal Creek - (Headwaters to South River) Snapfinger Creek - (Dekalb County) Snapping Shoals Creek - (Almand Branch to South River) South River - (Atlanta to Flakes Mill Road) South River - (Flakes Mill Road to Pole Bridge Creek) South River - (Hwy 20 to Snapping Shoals Creek)

Population on Septic Systems
TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD 18,650 22,785 5,668 17,785 TBD TBD TBD TBD 6,391 TBD TBD TBD TBD TBD 1,962 TBD 823 TBD TBD TBD TBD TBD TBD TBD 16,228 90,736 TBD TBD TBD TBD

Stream/Segment
South River - (Pole Bridge Creek to Hwy 20) South River - (Snapping Shoals to Jackson Lake) Stone Mountain Creek - (Headwaters to Stone Mountain Lake) Sugar Creek - (U/s Memorial Drive to South River) Sweetwater Creek - (Lee Daniel Creek to Yellow River) Swift Creek - (Headwaters to Yellow River) Tobesofkee Creek - (Cole Creek to Todd Creek) Tobesofkee Creek - (Lake Tobesofkee to Rocky Creek) Town Branch - (D/S Jackson S. WPCP to Aboothlacoosta Cr.) Turkey Creek - (Headwaters to Yellow River) Turnpike Creek - (Hwy 280 to Sugar Creek) Tussahaw Creek - (Wolf Creek to Lake Jackson) Walnut Creek - (Headwaters to Ocmulgee River) Watson Creek - (Headwaters to Yellow River) Wise Creek - (Headwaters to Kinnard Creek) Yellow River - (Big Haynes Creek to Jackson Lake) Yellow River - (Hwy 124 to Big Haynes Creek) Yellow River - (Sweetwater Creek to Hwy 124) Yellow Water Creek - (1 mile d/s Stark Road) Lake Jackson - (Newton, Butts, and Jasper Counties)
TBD = To Be Determined

Population on Septic Systems
TBD TBD TBD 10,552 TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD

Table 8 Loading Rates and Instream Fecal Coliform Concentrations for Existing Conditions During Critical Period

Stream/Segment

Critical Conditions Period

Alcovy River - (Cedar Creek to Bay Creek) Alligator Creek - (Batson Creek to Lime Sink Creek) Almand Branch - (Tanyard Branch to Snapping Shoals) Bay Creek - (Headwaters to Beaver Creek) Beaver Ruin Creek - (Gwinnett County) Big Cotton Indian Creek - (Panther Creek to Brush Creek) Big Flat Creek - (Headwaters to Flat Creek) Big Haynes Creek - (Brushy Creek to Little Panther Creek) Big Haynes Creek - (Headwaters to Brushy Creek) Big Haynes Creek - (Little Haynes Creek to Yellow River) Big Indian Creek - (Mossy Creek to Ocmulgee River) Big Sandy Creek - (Aboothlacoosta Creek to Ocmulgee River) Bromolow Creek - (Headwaters to Beaver Ruin Creek) Cabin Creek - (Headwaters Griffin to Towaliga River) Camp Creek - (Headwaters to Jackson Creek) Cedar Creek - (Headwaters to Alcovy River) Cobbs Creek - (Headwaters to Shoal Creek) Conley Creek - (Headwaters to South River)

TBD TBD
TBD TBD TBD TBD TBD TBD
TBD
TBD
TBD
TBD
TBD
TBD TBD TBD 8/7/98 - 9/5/98 6/3/99 - 7/2/99

Loading from NPDES
Discharges (counts/30 days)
TBD
TBD

Loading from Other Direct Sources (counts/30 days)
TBD TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0.0

1.45E+12

0.0

3.68E+11

Loading from Surface Runoff (counts/30 days)
TBD TBD
TBD TBD TBD TBD TBD TBD
TBD
TBD
TBD
TBD
TBD
TBD TBD TBD 4.1E+13 1.43E+13

Geometric Mean In-stream Fecal
Coliform Concentration (counts/100 ml)
TBD TBD
TBD TBD TBD TBD TBD TBD
TBD
TBD
TBD
TBD
TBD
TBD TBD TBD 1,107.3 369.7

Stream/Segment

Critical Conditions Period

Doless Creek - (Headwaters to Doolittle Creek) Doolittle Creek - (Headwaters to South River) Falling Creek - (Little Falling Creek to Ocmulgee River) Honey Creek - (Headwaters to South River) Hopkins Creek - (Headwaters to Alcovy River) House Creek - (Ball Creek to Little House Creek) Intrenchment Creek - (Headwaters to South River) Jacks Creek - (Headwaters to Yellow River) Jackson Creek - (Gwinnett County) Little Haynes Creek - (Hwy 20 to Big Haynes Creek) Little Stone Mountain Creek - (Headwaters to Stne Mtn Lake) Little Suwanee Creek - (Tributary to Yellow River) McClain Branch - (Headwaters to Honey Creek) No Business Creek - (Headwaters to Norris Lake) North Branch South River - (Atlanta) Ocmulgee River - (Beaverdam Creek to Walnut Creek) Ocmulgee River - (Sandy Run Creek to Big Indian Creek) Ocmulgee River - (Tobesofkee Creek to Echeconnee Creek) Pew Creek - (Gwinnett County)

7/3/99 - 8/28/99 5/31/99 - 6/29/99
TBD 7/29/95 - 8/27/95
TBD
TBD
8/7/98 - 9/5/98 TBD TBD TBD
TBD
TBD
7/16/95 - 8/14/95
TBD 9/16/96 - 10/15/96
TBD
TBD
TBD TBD

Loading from NPDES
Discharges (counts/30 days)

Loading from Other Direct Sources (counts/30 days)

0.0 0.0 TBD 5.01E+10 TBD

1.45E+11 1.33E+11
TBD 5.64E+11
TBD

TBD

TBD

0.0

1.08E+16

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

5.01E+10

1.83E+11

TBD

TBD

0.0

1.16E+14

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

Loading from Surface Runoff (counts/30 days)
7.69E+11 1.11E+13
TBD 6.66E+11
TBD
TBD
2.80E+12 TBD TBD TBD
TBD
TBD
3.42E+12
TBD 7.69E+11
TBD
TBD
TBD TBD

Geometric Mean In-stream Fecal
Coliform Concentration (counts/100 ml)
632.4 494.8 TBD 661.0 TBD
TBD
1,746.4 TBD TBD TBD
TBD
TBD
837.4
TBD 918.9 TBD
TBD
TBD TBD

Stream/Segment

Critical Conditions Period

Rocky Creek - (1 mile u/s Rocky Creek Rd. Tobesofkee Cr.) Shetley Creek - (Headwaters to Bromolow Creek) Shoal Creek - (Headwaters to Alcovy River) Shoal Creek - (Headwaters to South River) Snapfinger Creek - (Dekalb County) Snapping Shoals Creek - (Almand Branch to South River) South River - (Atlanta to Flakes Mill Road) South River - (Flakes Mill Road to Pole Bridge Creek) South River - (Hwy 20 to Snapping Shoals Creek) South River - (Pole Bridge Creek to Hwy 20) South River - (Snapping Shoals to Jackson Lake) Stone Mountain Creek - (Headwaters to Stone Mountain Lake) Sugar Creek - (U/s Memorial Drive to South River) Sweetwater Creek - (Lee Daniel Creek to Yellow River) Swift Creek - (Headwaters to Yellow River) Tobesofkee Creek - (Cole Creek to Todd Creek) Tobesofkee Creek - (Lake Tobesofkee to Rocky Creek) Town Branch - (D/S Jackson S. WPCP to Aboothlacoosta Cr.) Turkey Creek - (Headwaters to Yellow River) Turnpike Creek - (Hwy 280 to Sugar Creek)

TBD
TBD TBD 5/28/99 - 6/26/99 10/5/96 - 11/3/96 TBD TBD TBD
TBD TBD TBD
TBD
6/2/99 - 7/1/99
TBD TBD TBD
TBD
TBD TBD TBD

Loading from NPDES
Discharges (counts/30 days)

Loading from Other Direct Sources (counts/30 days)

TBD

TBD

TBD

TBD

TBD

TBD

0.0

1.16E+12

0.0

1.09E+12

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0.0

1.18E+12

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

Loading from Surface Runoff (counts/30 days)
TBD
TBD TBD 4.13E+13 2.26E+12 TBD TBD TBD
TBD TBD TBD
TBD
2.42E+13
TBD TBD TBD
TBD
TBD TBD TBD

Geometric Mean In-stream Fecal
Coliform Concentration (counts/100 ml)
TBD
TBD TBD 1,283.6 904.2 TBD TBD TBD
TBD TBD TBD
TBD
1,699.4
TBD TBD TBD
TBD
TBD TBD TBD

Stream/Segment

Critical Conditions Period

Tussahaw Creek - (Wolf Creek to Lake Jackson)

TBD

Walnut Creek - (Headwaters to Ocmulgee River)

TBD

Watson Creek - (Headwaters to Yellow River)

TBD

Wise Creek - (Headwaters to Kinnard Creek)

TBD

Yellow River - (Big Haynes Creek to Jackson Lake)

TBD

Yellow River - (Hwy 124 to Big Haynes Creek)

TBD

Yellow River - (Sweetwater Creek to Hwy 124)

TBD

Yellow Water Creek - (1 mile d/s Stark Road)

TBD

Lake Jackson - (Newton, Butts, and Jasper Counties)

TBD

TBD = To Be Determined

Loading from NPDES
Discharges (counts/30 days)

Loading from Other Direct Sources (counts/30 days)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

Loading from Surface Runoff (counts/30 days)
TBD
TBD TBD TBD TBD
TBD
TBD TBD TBD

Geometric Mean In-stream Fecal
Coliform Concentration (counts/100 ml)
TBD
TBD TBD TBD TBD
TBD
TBD TBD TBD

Table 9 TMDL Components

Stream/Segment
Alcovy River - (Cedar Creek to Bay Creek) Alligator Creek - (Batson Creek to Lime Sink Creek) Almand Branch - (Tanyard Branch to Snapping Shoals) Bay Creek - (Headwaters to Beaver Creek) Beaver Ruin Creek - (Gwinnett County) Big Cotton Indian Creek - (Panther Creek to Brush Creek) Big Flat Creek - (Headwaters to Flat Creek) Big Haynes Creek - (Brushy Creek to Little Panther Creek) Big Haynes Creek - (Headwaters to Brushy Creek) Big Haynes Creek - (Little Haynes Creek to Yellow River) Big Indian Creek - (Mossy Creek to Ocmulgee River) Big Sandy Creek - (Aboothlacoosta Creek to Ocmulgee River) Bromolow Creek - (Headwaters to Beaver Ruin Creek) Cabin Creek - (Headwaters Griffin to Towaliga River) Camp Creek - (Headwaters to Jackson Creek) Cedar Creek - (Headwaters to Alcovy River) Cobbs Creek - (Headwaters to Shoal Creek) Conley Creek - (Headwaters to South River) Doless Creek - (Headwaters to Doolittle Creek) Doolittle Creek - (Headwaters to South River) Falling Creek - (Little Falling Creek to Ocmulgee River) Honey Creek - (Headwaters to South River) Hopkins Creek - (Headwaters to Alcovy River) House Creek - (Ball Creek to Little House Creek) Intrenchment Creek - (Headwaters to South River) Jacks Creek - (Headwaters to Yellow River) Jackson Creek - (Gwinnett County) Little Haynes Creek - (Hwy 20 to Big Haynes Creek) Little Stone Mountain Creek - (Headwaters to Stone Mountain Lake) Little Suwanee Creek - (Tributary to Yellow River)

WLAs (counts/30 days)
TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD 0.0 0.0 0.0 0.0 TBD 4.25E+10 TBD TBD 0.0 TBD TBD TBD TBD TBD

LAs (counts/30
days)
TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD 2.96E+12 4.88E+12 8.52E+10 1.15E+12 TBD 4.88E+12 TBD TBD 1.53E+14 TBD TBD TBD TBD TBD

Margin of Safety
Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit

TMDL (counts/30 days)
TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD 2.96E+12 4.88E+12 8.52E+10 1.15E+12 TBD 4.92E+12 TBD TBD 1.53E+14 TBD TBD TBD TBD TBD

Stream/Segment
McClain Branch - (Headwaters to Honey Creek) No Business Creek - (Headwaters to Norris Lake) North Branch South River - (Atlanta) Ocmulgee River - (Beaverdam Creek to Walnut Creek) Ocmulgee River - (Sandy Run Creek to Big Indian Creek) Ocmulgee River - (Tobesofkee Creek to Echeconnee Creek) Pew Creek - (Gwinnett County) Rocky Creek - (1 mile u/s Rocky Creek Rd. - Tobesofkee Cr.) Shetley Creek - (Headwaters to Bromolow Creek) Shoal Creek - (Headwaters to Alcovy River) Shoal Creek - (Headwaters to South River) Snapfinger Creek - (Dekalb County) Snapping Shoals Creek - (Almand Branch to South River) South River - (Atlanta to Flakes Mill Road) South River - (Flakes Mill Road to Pole Bridge Creek) South River - (Hwy 20 to Snapping Shoals Creek) South River - (Pole Bridge Creek to Hwy 20) South River - (Snapping Shoals to Jackson Lake) Stone Mountain Creek - (Headwaters to Stone Mountain Lake) Sugar Creek - (U/s Memorial Drive to South River) Sweetwater Creek - (Lee Daniel Creek to Yellow River) Swift Creek - (Headwaters to Yellow River) Tobesofkee Creek - (Cole Creek to Todd Creek) Tobesofkee Creek - (Lake Tobesofkee to Rocky Creek) Town Branch - (D/S Jackson S. WPCP to Aboothlacoosta Cr.) Turkey Creek - (Headwaters to Yellow River) Turnpike Creek - (Hwy 280 to Sugar Creek) Tussahaw Creek - (Wolf Creek to Lake Jackson) Walnut Creek - (Headwaters to Ocmulgee River) Watson Creek - (Headwaters to Yellow River) Wise Creek - (Headwaters to Kinnard Creek) Yellow River - (Big Haynes Creek to Jackson Lake) Yellow River - (Hwy 124 to Big Haynes Creek)

WLAs (counts/30 days)
4.25E+10 TBD 0.0 TBD TBD TBD TBD TBD TBD TBD 0.0 0.0 TBD TBD TBD TBD TBD TBD TBD 0.0 TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD

LAs (counts/30
days)
2.95E+11 TBD
3.89E+12 TBD TBD TBD TBD TBD TBD TBD
1.29E+12 7.59E+11
TBD TBD TBD TBD TBD TBD TBD 1.68E+12 TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD

Margin of Safety
Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit

TMDL (counts/30 days)
3.37E+11 TBD
3.89E+12 TBD TBD TBD TBD TBD TBD TBD
1.29E+12 7.59E+11
TBD TBD TBD TBD TBD TBD TBD 1.68E+12 TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD

Stream/Segment
Yellow River - (Sweetwater Creek to Hwy 124) Yellow Water Creek - (1 mile d/s Stark Road) Lake Jackson - (Newton, Butts, and Jasper Counties) TBD = To Be Determined

WLAs (counts/30 days)
TBD TBD TBD

LAs (counts/30
days)
TBD TBD TBD

Margin of Safety
Implicit + 10% Explicit Implicit + 10% Explicit Implicit + 10% Explicit

TMDL (counts/30 days)
TBD TBD TBD

Table 10 Load Allocations for Ocmulgee River Basin

Stream/Segment
Alcovy River (Cedar Creek to Bay Creek) Alligator Creek (Batson Creek to Lime Sink Creek) Almand Branch (Tanyard Branch to Snapping Shoals) Bay Creek (Headwaters to Beaver Creek) Beaver Ruin Creek (Gwinnett County) Big Cotton Indian Cr. (Panther Creek to Brush Creek) Big Flat Creek (Headwaters to Flat Creek) Big Haynes Creek (Brushy Creek to Little Panther Creek) Big Haynes Creek (Headwaters to Brushy Creek) Big Haynes Creek (Little Haynes Creek to Yellow River) Big Indian Creek (Mossy Creek to Ocmulgee River) Big Sandy Creek (Aboothlacoosta Creek to Ocmulgee River) Bromolow Creek (Headwaters to Beaver Ruin Creek) Cabin Creek (Headwaters Griffin to Towaliga River)

Most Significant Impact(s)
TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD
TBD
TBD TBD

Loading from Point Sources (counts/30 days)
TBD

Non-point Sources

Loading from Other Direct Sources
(counts/30 days)

Loading from Surface Runoff (counts/30 days)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

Overall Loading (counts/30 days)
TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD
TBD
TBD TBD

Stream/Segment
Camp Creek (Headwaters to Jackson Creek) Cedar Creek (Headwaters to Alcovy River) Cobbs Creek (Headwaters to Shoal Creek) Conley Creek (Headwaters to South River) Doless Creek (Headwaters to Doolittle Creek) Doolittle Creek (Headwaters to South River) Falling Creek (Little Falling Creek to Ocmulgee River) Honey Creek (Headwaters to South River) Hopkins Creek (Headwaters to Alcovy River) House Creek (Ball Creek to Little House Creek) Intrenchment Creek (Headwaters to South River) Jacks Creek (Headwaters to Yellow River) Jackson Creek (Gwinnett County) Little Haynes Creek (Hwy 20 to Big Haynes Creek) Little Stone Mountain Creek (Headwaters to Stone Mountain Lake) Little Suwanee Creek (Tributary to Yellow River)

Most Significant Impact(s)
TBD TBD Urban Runoff Urban Runoff Urban Runoff Urban Runoff TBD Urban nonpoint sources TBD TBD Combined Sewer Overflows (CSOs) TBD TBD TBD TBD TBD

Loading from Point Sources (counts/30 days)
TBD TBD 0.0 0.0 0.0 0.0 TBD 4.25E+10 TBD TBD 0.0 TBD TBD TBD TBD TBD

Non-point Sources

Loading from Other Direct Sources
(counts/30 days)

Loading from Surface Runoff (counts/30 days)

TBD

TBD

TBD

TBD

1.90E+11

2.77E+12

2.18E+11

4.66E+12

4.07E+10

4.46E+10

5.15E+10

1.10E+12

TBD

TBD

1.97E+11

4.60E+10

TBD

TBD

TBD

TBD

3.69E+12

2.03E+11

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

Overall Loading (counts/30 days)
TBD TBD 2.96E+12 4.88E+12 8.52E+10 1.15E+12 TBD 2.87E+11 TBD TBD 3.89E+12 TBD TBD TBD TBD TBD

Stream/Segment
McClain Branch (Headwaters to Honey Creek) No Business Creek (Headwaters to Norris Lake) North Branch South River (Atlanta) Ocmulgee River (Beaverdam Creek to Walnut Creek) Ocmulgee River (Sandy Run Creek to Big Indian Creek) Ocmulgee River (Tobesofkee Creek to Echeconnee Creek) Pew Creek (Gwinnett County) Rocky Creek (1 mile u/s Rocky Cr. Rd. to Tobesofkee Cr.) Shetley Creek (Headwaters to Bromolow Creek) Shoal Creek (Headwaters to Alcovy River) Shoal Creek (Headwaters to South River) Snapfinger Creek (Dekalb County) Snapping Shoals Creek (Almand Branch to South River) South River (Atlanta to Flakes Mill Road) South River (Flakes Mill Road to Pole Bridge Creek)

Most Significant Impact(s)
Urban Runoff TBD
Combined Sewer Overflows (CSOs)
TBD TBD
TBD
TBD
TBD
TBD TBD Urban Runoff Urban Runoff TBD TBD TBD

Loading from Point Sources (counts/30 days)
4.25E+10 TBD 0.0 TBD TBD
TBD
TBD
TBD
TBD TBD 0.0 0.0 TBD TBD TBD

Non-point Sources

Loading from Other Direct Sources
(counts/30 days)

Loading from Surface Runoff (counts/30 days)

4.80E+10

2.46E+11

TBD

TBD

3.69E+12

2.03E+11

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD TBD 3.12E+11 3.61E+11 TBD TBD TBD

TBD TBD 9.79E+11 3.98E+11 TBD TBD TBD

Overall Loading (counts/30 days)
3.37E+11 TBD
3.89E+12 TBD TBD
TBD
TBD
TBD
TBD TBD 1.29E+12 7.59E+11 TBD TBD TBD

Stream/Segment
South River (Hwy 20 to Snapping Shoals Creek) South River (Pole Bridge Creek to Hwy 20) South River (Snapping Shoals to Jackson Lake) Stone Mountain Creek (Headwaters to Stone Mountain Lake) Sugar Creek (U/s Memorial Drive to South River) Sweetwater Creek (Lee Daniel Creek to Yellow River) Swift Creek (Headwaters to Yellow River) Tobesofkee Creek (Cole Creek to Todd Creek) Tobesofkee Creek (Lake Tobesofkee to Rocky Creek) Town Branch (D/S Jackson S. WPCP to Aboothlacoosta Cr.) Turkey Creek (Headwaters to Yellow River) Turnpike Creek (Hwy 280 to Sugar Creek) Tussahaw Creek (Wolf Creek to Lake Jackson) Walnut Creek (Headwaters to Ocmulgee River) Watson Creek (Headwaters to Yellow River)

Most Significant Impact(s)
TBD TBD TBD TBD Urban Runoff TBD TBD TBD TBD
TBD
TBD TBD TBD TBD TBD

Loading from Point Sources (counts/30 days)
TBD

Non-point Sources

Loading from Other Direct Sources
(counts/30 days)

Loading from Surface Runoff (counts/30 days)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

0.0

1.37E+11

1.55E+12

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

Overall Loading (counts/30 days)
TBD TBD TBD TBD 1.68E+12 TBD TBD TBD TBD
TBD
TBD TBD TBD TBD TBD

Stream/Segment
Wise Creek (Headwaters to Kinnard Creek) Yellow River (Big Haynes Creek to Jackson Lake) Yellow River (Hwy 124 to Big Haynes Creek) Yellow River (Sweetwater Creek to Hwy 124) Yellow Water Creek (1 mile d/s Stark Road) Lake Jackson (Newton, Butts, and Jasper Counties)
TBD = To Be Determined

Most Significant Impact(s)
TBD TBD TBD TBD TBD TBD

Loading from Point Sources (counts/30 days)
TBD

Non-point Sources

Loading from Other Direct Sources
(counts/30 days)

Loading from Surface Runoff (counts/30 days)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

Overall Loading (counts/30 days)
TBD TBD TBD TBD TBD TBD

Table 11 Possible Load Reduction Scenarios for the Ocmulgee River Basin

Stream/Segment
Alcovy River (Cedar Creek to Bay Creek) Alligator Creek (Batson Creek to Lime Sink Creek) Almand Branch (Tanyard Branch to Snapping Shoals) Bay Creek (Headwaters to Beaver Creek) Beaver Ruin Creek (Gwinnett County) Big Cotton Indian Cr. (Panther Creek to Brush Creek) Big Flat Creek (Headwaters to Flat Creek) Big Haynes Creek (Brushy Creek to Little Panther Creek) Big Haynes Creek (Headwaters to Brushy Creek) Big Haynes Creek (Little Haynes Creek to Yellow River) Big Indian Creek (Mossy Creek to Ocmulgee River) Big Sandy Creek (Aboothlacoosta Creek to Ocmulgee River) Bromolow Creek (Headwaters to Beaver Ruin Creek) Cabin Creek (Headwaters Griffin to Towaliga River)

Reduction from Point Sources (percentage)
TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD

Non-point Sources

Reduction from Other Direct Sources
(percentage)

Reduction from Surface Runoff
(percentage)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

Overall Reduction (percentage)
TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD

Stream/Segment
Camp Creek (Headwaters to Jackson Creek) Cedar Creek (Headwaters to Alcovy River) Cobbs Creek (Headwaters to Shoal Creek) Conley Creek (Headwaters to South River) Doless Creek (Headwaters to Doolittle Creek) Doolittle Creek (Headwaters to South River) Falling Creek (Little Falling Creek to Ocmulgee River) Honey Creek (Headwaters to South River) Hopkins Creek (Headwaters to Alcovy River) House Creek (Ball Creek to Little House Creek) Intrenchment Creek (Headwaters to South River) Jacks Creek (Headwaters to Yellow River) Jackson Creek (Gwinnett County) Little Haynes Creek (Hwy 20 to Big Haynes Creek) Little Stone Mountain Creek (Headwaters to Stone Mountain Lake) Little Suwanee Creek (Tributary to Yellow River)

Reduction from Point Sources (percentage)
TBD TBD 0.0 0.0 0.0 0.0 TBD 15.0 TBD TBD 0.0 TBD TBD TBD TBD TBD

Non-point Sources

Reduction from Other Direct Sources
(percentage)

Reduction from Surface Runoff
(percentage)

TBD

TBD

TBD

TBD

86.9

93.2

40.8

67.4

71.9

94.2

61.3

90.1

TBD

TBD

62.0

93.1

TBD

TBD

TBD

TBD

99.9

92.8

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

Overall Reduction (percentage)
TBD TBD 93.0 66.7 94.6 89.8 TBD 77.6 TBD TBD 98.6 TBD TBD TBD TBD TBD

Stream/Segment
McClain Branch (Headwaters to Honey Creek) No Business Creek (Headwaters to Norris Lake) North Branch South River (Atlanta) Ocmulgee River (Beaverdam Creek to Walnut Creek) Ocmulgee River (Sandy Run Creek to Big Indian Creek) Ocmulgee River (Tobesofkee Creek to Echeconnee Creek) Pew Creek (Gwinnett County) Rocky Creek (1 mile u/s Rocky Cr. Rd. to Tobesofkee Cr.) Shetley Creek (Headwaters to Bromolow Creek) Shoal Creek (Headwaters to Alcovy River) Shoal Creek (Headwaters to South River) Snapfinger Creek (Dekalb County) Snapping Shoals Creek (Almand Branch to South River) South River (Atlanta to Flakes Mill Road) South River (Flakes Mill Road to Pole Bridge Creek) South River (Hwy 20 to Snapping Shoals Creek)

Reduction from Point Sources (percentage)
15.0 TBD 0.0 TBD TBD TBD TBD TBD TBD TBD 0.0 0.0 TBD TBD TBD TBD

Non-point Sources

Reduction from Other Direct Sources
(percentage)

Reduction from Surface Runoff
(percentage)

73.8

92.8

TBD

TBD

96.8

73.6

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

73.1

97.6

66.9

82.4

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

Overall Reduction (percentage)
90.8 TBD 96.7 TBD TBD TBD TBD TBD TBD TBD 96.9 81.4 TBD TBD TBD TBD

Stream/Segment
South River (Pole Bridge Creek to Hwy 20) South River (Snapping Shoals to Jackson Lake) Stone Mountain Creek (Headwaters to Stone Mountain Lake) Sugar Creek (U/s Memorial Drive to South River) Sweetwater Creek (Lee Daniel Creek to Yellow River) Swift Creek (Headwaters to Yellow River) Tobesofkee Creek (Cole Creek to Todd Creek) Tobesofkee Creek (Lake Tobesofkee to Rocky Creek) Town Branch (D/S Jackson S. WPCP to Aboothlacoosta Cr.) Turkey Creek (Headwaters to Yellow River) Turnpike Creek (Hwy 280 to Sugar Creek) Tussahaw Creek (Wolf Creek to Lake Jackson) Walnut Creek (Headwaters to Ocmulgee River) Watson Creek (Headwaters to Yellow River) Wise Creek (Headwaters to Kinnard Creek) Yellow River (Big Haynes Creek to Jackson Lake)

Reduction from Point Sources (percentage)
TBD TBD TBD 0.0 TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD

Non-point Sources

Reduction from Other Direct Sources
(percentage)

Reduction from Surface Runoff
(percentage)

TBD

TBD

TBD

TBD

TBD

TBD

88.4

93.6

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

Overall Reduction (percentage)
TBD TBD TBD 93.4 TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD TBD

Stream/Segment
Yellow River (Hwy 124 to Big Haynes Creek) Yellow River (Sweetwater Creek to Hwy 124) Yellow Water Creek (1 mile d/s Stark Road) Lake Jackson (Newton, Butts, and Jasper Counties)
TBD = To Be Determined

Reduction from Point Sources (percentage)
TBD TBD TBD TBD

Non-point Sources

Reduction from Other Direct Sources
(percentage)

Reduction from Surface Runoff
(percentage)

TBD

TBD

TBD

TBD

TBD

TBD

TBD

TBD

Overall Reduction (percentage)
TBD TBD TBD TBD

APPENDIX A: WATER QUALITY MONITORING DATA

Ocmulgee River Basin

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page A-1 of A-6

Stream/Segment
Alcovy River (Cedar Creek to Bay Creek)
Alligator Creek (Batson Creek to Lime Sink Creek)
Almand Branch (Tanyard Branch to Snapping Shoals)
Bay Creek (Headwaters to Beaver Creek)
Beaver Ruin Creek (Gwinnett County)
Big Cotton Indian Cr. (Panther Creek to Brush Creek)
Big Flat Creek (Headwaters to Flat Creek)
Big Haynes Creek (Brushy Creek to Little Panther Creek)
Big Haynes Creek (Headwaters to Brushy Creek) Big Haynes Creek (Little Haynes Creek to Yellow River)
Big Indian Creek (Mossy Creek to Ocmulgee River)
Big Sandy Creek (Aboothlacoosta Creek to Ocmulgee River)
Bromolow Creek (Headwaters to Beaver Ruin Creek)

Sample Dates
02/12/1999 02/16/1999 02/22/1999 03/05/1999 04/06/1999 04/15/1999 04/22/1999 04/28/1999 02/11/1999 02/17/1999 02/23/1999 03/03/1999 01/19/1999 01/27/1999 02/02/1999 02/18/1999
02/11/1999 02/17/1999 02/23/1999 03/03/1999
02/12/1999 02/16/1999 02/22/1999
2/12/1999 2/16/1999 2/22/1999 3/05/1999
01/19/1999 01/27/1999 02/02/1999 02/18/1999
01/21/1999 01/26/1999 02/04/1999 04/16/1999 03/09/1999 03/15/1999 03/18/1999 03/24/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
70 20 20 170 80 490 1700 4900 790 20 20 460 2400 92000 >24000 92000

Geometric Mean
(#/100 ml.) 47
756
110
26424

Sample Dates
04/08/1999 04/13/1999 04/20/1999 04/29/1999 05/20/1999 05/27/1999 06/10/1999 06/17/1999 04/07/1999 04/12/1999 04/19/1999 04/28/1999 04/01/1999 04/14/1999 04/21/1999 04/28/1999

220

04/07/1999

220 220

234

04/12/1999 04/19/1999

280

04/28/1999

170

04/08/1999

80 260

130

04/13/1999 04/20/1999

80

04/29/1999

230

6/10/1999

70 330

185

6/17/1999 6/24/1999

220

07/08/1999

20 230 1700 180
70 130 330 490 <20 130 20 170

04/01/1999

194

04/14/1999 04/21/1999

04/28/1999

03/30/1999

196

04/13/1999 04/20/1999

04/27/1999

05/03/1999

55

05/12/1999 05/18/1999

06/02/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
230 60 20 110 490 460 490 1700 230 50 130 170 1300 3300 3500 4900

Geometric Mean
(#/100 ml.)
74

Sample Dates
06/10/1999 06/17/1999 06/24/1999 07/08/1999

658 07/29/1999

126 2929

06/09/1999 06/16/1999 06/23/1999 07/07/1999
06/23/1999 06/30/1999 07/14/1999 07/21/1999

Fecal Coliform Bacteria
(MPN/100 ml.) 130 1700 140 700
490
230 1300 490 7900 92000 5400 >24000 17000

170 330 490 1300
4100 790 460 7000
270 490 60 1100

435 1797 306

06/09/1999 06/16/1999 06/23/1999 07/07/1999 06/10/1999 06/17/1999 06/24/1999 07/08/1999
04/08/1999 04/13/1999 04/20/1999

490 790 330 460 330 490 5400 3300
130 80 330

130

06/23/1999

50 50

60

06/30/1999 07/14/1999

40

07/21/1999

20

06/22/1999

80 50

58

06/29/1999 07/13/1999

140

07/20/1999

330

07/06/1999

230 50

149

07/19/1999 07/22/1999

130

07/28/1999

130 940 1700 65
230 2400 170 130 3500 220 9200 1100

Geometric Mean
(#/100 ml.) 384
1037 21218
492 1303
341 332 1671

Sample Dates
09/09/1999 09/23/1999 09/30/1999 10/07/1999
08/12/1999
09/08/1999 09/22/1999 09/29/1999 10/06/1999 09/22/1999 09/29/1999 10/05/1999 10/20/1999
09/08/1999 09/22/1999 09/29/1999 10/06/1999 09/09/1999 09/23/1999 09/30/1999 10/07/1999 09/09/1999 09/30/1999 10/07/1999
09/22/1999 09/29/1999 10/05/1999 10/20/1999
09/21/1999 29/28/1999 10/06/1999 10/19/1999 11/01/1999 11/04/1999 11/15/1999 11/18/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
330 790 130 490

Geometric Mean
(#/100 ml.)
359

490

80 170 11000 130
14950 230 1100
10000

373 2480

270 3500 >24000
490 1300 340 330 2300
170 80 130

1826 761

170

110

50

83

50

330

210 230

258

280

220

1300 130

264

130

Table A1 Water Quality Monitoring Data, Ocmulgee River Basin

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page A-2 of A-6

Stream/Segment
Cabin Creek (Headwaters Griffin to Towaliga River)
Camp Creek (Headwaters to Jackson Creek)
Cedar Creek (Headwaters to Alcovy River)
Cobbs Creek (Headwaters to Shoal Creek)
Conley Creek (Headwaters to South River)
Doless Creek (Headwaters to Dolittle Creek)
Doolittle Creek (Headwaters to South River)
Falling Creek (Little Falling Creek to Ocmulgee River)
Honey Creek (Headwaters to South River)
Hopkins Creek (Headwaters to Alcovy River)
House Creek (Ball Creek to Little House Creek)

Sample Dates
02/25/1999 03/01/1999 03/08/1999 03/11/1999
03/09/1999 03/15/1999 03/18/1999 03/24/1999 03/09/1999 03/15/1999 03/18/1999 03/24/1999 03/10/1999 03/16/1999 03/22/1999 03/25/1999 03/10/1999 03/16/1999 03/22/1999 03/25/1999 03/10/1999 03/16/1999 03/22/1999 03/25/1999 07/07/1999 07/20/1999 07/26/1999 07/29/1999 01/21/1999 01/26/1999 02/04/1999 02/16/1999 02/25/1999 03/01/1999 03/08/1999 03/11/1999 03/09/1999 03/15/1999 03/18/1999 03/24/199 04/06/1999 04/15/1999 04/22/199 04/28/1999

Fecal Coliform Bacteria
(MPN/100 ml.)

Geometric Mean
(#/100 ml.)

Sample Dates

40 170 140 330
790 330 110 110 80 40 170 80 <20 16000 260 330 <20 230 90 490 <20 <20 3500 790 1700 1700 230 230 490 130 50 170 230 1300 80 170 490 50 <20 80 460 230 20 270

04/06/1999

133

04/14/1999 04/21/1999

04/27/1999

03/03/1999

237

03/12/1999 03/18/1999

06/02/1999

05/03/1999

81

05/12/1999 05/18/1999

06/02/1999

05/04/1999

407

05/13/1999 05/17/1999

05/19/1999

05/04/1999

119

05/13/1999 05/17/1999

05/19/1999

05/04/1999

182

05/13/1999 05/17/1999

05/19/1999

11/02/1999

625

11/08/1999 11/16/1999

11/22/1999

03/30/1999

153

04/13/1999 04/20/1999

04/27/1999

04/06/1999

253

04/14/1999 04/21/1999

04/27/1999

05/03/1999

79

05/12/1999 05/18/1999

06/02/1999

07/29/1999

155

08/12/1999 08/19/1999

08/26/1999

Fecal Coliform Bacteria
(MPN/100 ml.)

Geometric Mean
(#/100 ml.)

Sample Dates

Fecal Coliform Bacteria
(MPN/100 ml.)

110 1400 330 170
130 330 140 460 80 500 50 20 170 460 490 >24000 490 70 1700 1100 790 92000 >24000 1300 5400 110 80 50 230 80 70 130 330 490 230 330 80 790 330 330 130 1100 130 1400

06/08/1999

305

06/15/1999 06/22/1999

07/06/1999

07/06/1999

229

07/19/1999 07/22/1999

07/28/1999

07/06/1999

80

07/19/1999 07/22/1999

07/28/1999

07/07/1999

979

07/20/1999 07/26/1999

0729/1999

07/07/1999

503

07/20/1999 07/26/1999

07/29/1999

6901

221

06/22/1999

114

06/29/1999 07/13/1999

07/20/1999

06/08/1999

333

06/15/1999 06/22/1999

07/06/1999

07/06/1999

288

07/19/1999 07/22/1999

07/28/1999

402 11/18/1999

1300 940 460 330
460 490 330 630 230 330 140 230 35000 1700 700 460 490 170 310 1100
130 230 170 490 490 220 330 790 490 170 490 110
20

Geometric Mean
(#/100 ml.) 656 465 222 2029 411
223 409 259

Sample Dates
09/07/1999 09/21/1999 09/28/1999 10/05/1999
11/01/1999 11/04/1999 11/15/1999 11/18/1999 11/01/1999 11/04/1999 11/15/1999 11/18/1999 11/02/1999 11/08/1999 11/16/1999 11/22/1999 11/02/1999 11/08/1999 11/16/1999 11/22/1999
09/21/1999 09/28/1999 10/06/1999 10/19/1999 09/07/1999 09/21/1999 09/28/1999 10/05/1999 11/01/1999 11/04/1999 11/15/1999 11/18/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
490 790 490 4900
170 330 220 20 110 50 70 <20 16000 90 130 80 5400 70 430 50

Geometric Mean
(#/100 ml.) 982
125
53
350
300

80

1300 230

241

140

490

330 11000

742

170

<20

20 50

39

110

Table A1 Water Quality Monitoring Data, Ocmulgee River Basin

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page A-3 of A-6

Stream/Segment

Sample Dates

Intrenchment Creek (Headwaters to South River)
Jacks Creek (Headwaters to Yellow River)
Jackson Creek (Gwinnett County)
Little Haynes Creek (Hwy 20 to Big Haynes Creek)
Little Stone Mountain Creek (Headwaters to Stone Mountain Lake)
Little Suwannee Creek (Tributary to Yellow River)
McClain Branch (Headwaters to Honey Creek)
No Business Creek (Headwaters to Norris Lake)
North Branch South River (Atlanta)
Ocmulgee River (Beaverdam Creek to Walnut Creek)
Ocmulgee River (Sandy Run Creek to Big Indian Creek)
Ocmulgee River (Tobesofkee Creek to Echeconnee Creek)

03/10/1999 03/16/1999 03/22/1999 03/25/1999 03/11/1999 03/17/1999 03/23/1999 04/08/1999 03/09/1999 03/15/1999 03/18/1999 03/24/1999 02/12/1999 02/16/1999 02/22/1999 03/05/1999 03/11/1999 03/17/1999 03/23/1999 04/08/1999 03/09/1999 03/15/1999 03/18/1999 03/24/1999 03/10/1999 03/16/1999 03/22/1999 03/25/1999 03/11/1999 03/17/1999 03/23/1999 04/08/1999
01/20/1999 01/28/1999 02/03/1999 02/17/1999 01/19/1999 01/27/1999 02/02/1999 02/18/1999 01/20/1999 01/28/1999 02/03/1999 02/17/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
<20 <20 330 1300
80 460 20 80 1700 60 <20 330 220 80 20 70 130 80 70 170 2400 60 110 70 <20 2200 54000 140 140 50 20 330

Geometric Mean
(#/100 ml.) 114
88
161
70
105
182
759
82

Sample Dates
05/04/1999 05/13/1999 05/17/1999 05/19/1999 05/06/1999 05/17/1999 05/20/1999 06/03/1999 05/03/1999 05/12/1999 05/18/1999 06/02/1999 04/08/1999 04/13/199 04/20/1999 04/29/1999 05/06/1999 05/17/1999 05/20/1999 06/03/1999 05/03/1999 05/12/1999 05/18/1999 06/02/1999 05/04/1999 05/13/1999 05/17/1999 05/19/1999 05/06/1999 05/17/1999 05/20/1999 06/03/1999

20 50 700 330
20 490 490 170
20 110 1300 110

03/31/1999

123

04/15/1999 04/22/1999

04/29/1999

04/01/1999

169

04/14/1999 04/21/1999

04/28/1999

03/31/1999

133

04/15/1999 04/22/1999

04/29/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
70 2200 1300 3500 >24000 1100 1100 3500 170 340 130
70 230 130 170 790 790 130 790 3100 330 490 790 5400 230 220 490 790 16000 330 20 140

Geometric Mean
(#/100 ml.) 915
3137
151
252
708
911
374
349

Sample Dates
07/07/1999 07/20/1999 07/26/1999 07/29/1999 07/08/1999 07/21/1999 07/27/1999 08/02/1999 07/06/1999 07/19/1999 07/22/1999 07/28/1999 07/10/1999 07/17/1999 07/24/1999 08/08/1999 0708/1999 0721/1999 0727/1999 08/02/1999 07/06/1999 07/19/1999 07/22/1999 07/28/1999 07/07/1999 07/20/1999 07/26/1999 07/29/1999 07/08/1999 07/21/1999 07/27/1999 08/02/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
>24000 >24000
<20 2400 2400 1700 490 1100 490 2200 330 230 130 1300
80 700 330 490 310 790 310 1700 2400 3500 700 330 1100 630 80 1100 130 220

20

06/24/1999

50

80 40

34

07/01/1999 07/15/1999

330 210

20

07/22/1999

490

130

06/23/1999

40

50 <20

57

06/30/1999 07/14/1999

330 790

80

07/21/1999

490

50

06/24/1999

230

40 20

30

07/01/1999 07/15/1999

170 490

<20

07/22/1999

460

Geometric Mean
(#/100 ml.) 2293 1218 535 252 446 1451 633 224
203 267 306

Sample Dates
11/02/1999 11/08/1999 11/16/1999 11/22/1999 11/03/1999 11/09/1999 11/17/1999 11/23/1999 11/01/1999 11/04/1999 11/15/1999 11/18/1999 09/09/1999 09/23/1999 09/30/1999 10/07/1999 11/03/1999 11/09/1999 11/17/1999 11/23/1999 11/01/1999 11/04/1999 11/15/1999 11/18/1999 11/02/1999 11/08/1999 11/16/1999 11/22/1999 11/03/1999 11/09/1999 11/17/1999 11/23/1999
09/23/1999 09/30/1999 10/07/1999 10/21/1999 09/22/1999 09/29/1999 10/05/1999 10/20/1999 09/23/1999 09/30/1999 10/07/1999 10/21/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
>24000 330 140 50 940 230 460 260 230 700 60 110 130 2800 700 110 790 490 110 170 490 490 330 790 5400 330 230 220 80 170 40 50

Geometric Mean
(#/100 ml.) 485
401
181
409
292
500
548
72

330

<20 <20

51

50

80

80 490

89

<20

<20

140 230

85

80

Table A1 Water Quality Monitoring Data, Ocmulgee River Basin

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page A-4 of A-6

Stream/Segment
Pew Creek (Gwinnett County)
Rocky Creek (1 mile u/s Rocky Cr. Rd. to Tobesofkee Cr.) Shetley Creek (Headwaters to Bromolow Creek)
Shoal Creek (Headwaters to Alcovy River)
Shoal Creek (Headwaters to South River)
Snapfinger Creek (Dekalb County)
Snapping Shoals Creek (Almand Branch to South River)
South River (Atlanta to Flakes Mill Road)
South River (Flakes Mill Road to Pole Bridge Creek)
South River (Hwy 20 to Snapping Shoals Creek)
South River (Pole Bridge Creek to Hwy 20)
South River (Snapping Shoals to Jackson Lake)

Sample Dates
03/09/1999 03/15/1999 03/18/1999 03/24/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
130 170 <20 20

Geometric Mean
(#/100 ml.)
55

Sample Dates
05/03/1999 05/12/1999 05/18/1999 06/02/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
40 490 110 230

Geometric Mean
(#/100 ml.)
149

Sample Dates
07/06/1999 07/19/1999 07/22/1999 07/28/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
490 330 3500 170

03/09/1999 03/15/1999 03/18/1999 03/24/1999
03/09/1999 03/15/1999 03/18/1999 03/24/1999
03/10/1999 03/16/1999 03/22/1999 03/25/1999
02/11/1999 02/17/1999 02/23/1999 03/03/1999
03/10/1999 03/16/1999 03/22/1999 03/25/1999
02/11/1999 02/17/1999 02/23/1999 03/03/1999
02/11/1999 02/17/1999 02/23/1999 03/03/1999
01/07/1999 01/13/1999 01/20/1999 02/04/1999
02/11/1999 02/17/1999 02/23/1999 03/03/1999
01/04/1999 01/21/1999 01/25/1999 02/03/1999

490 170 130 260
1100 130 790 230
<20 5400 2400 630
1300 170 220 170
<20 170 110 1100
1100 170 90 170
2200 230 1700 130
230 310 20 1100
4900 110 <20 50
20 110 213 1700

05/03/1999

230

05/12/1999 05/18/1999

06/02/1999

05/03/1999

401

05/12/1999 05/18/1999

06/02/1999

05/04/1999

636

05/13/1999 05/17/1999

05/19/1999

04/07/1999

302

04/12/1999 04/19/1999

04/28/1999

05/04/1999

142

05/13/1999 05/17/1999

05/19/1999

04/07/1999

231

04/12/1999 04/19/1999

04/28/1999

04/07/1999

578

04/12/1999 04/19/1999

04/28/1999

04/06/1999

199

04/14/1999 04/21/1999

04/27/1999

04/07/1999

152

04/12/1999 04/19/1999

04/28/1999

05/06/1999

184

05/11/1999 05/18/1999

06/03/1999

110 4300 220 1100
330 1300 230 130
2400 460 360 35000
330 70 310 35000
790 490 1300 2200
330 490 1300 35000
130 130 790 24000
80 1100 790 170
70 490 1100 790
640 110 20 1100

582 337 1931 708 1026 1647 752 330 416 198.4

06/06/1999 06/19/1999 06/22/1999 06/28/1999
07/06/1999 07/19/1999 07/22/1999 07/28/1999
06/07/1999 06/20/1999 06/26/1999 06/29/1999
06/09/1999 06/16/1999 06/23/1999 07/07/1999
07/07/1999 07/20/1999 07/26/1999 07/29/1999
06/09/1999 06/16/1999 06/23/1999 07/07/1999
06/09/1999 06/16/1999 06/23/1999 07/07/1999
06/08/1999 06/15/1999 06/22/1999 07/06/1999
06/09/1999 06/16/1999 06/23/1999 07/07/1999
09/03/1999 09/15/1999 09/22/1999 09/30/1999

2400 790 2200 3500
2400 20
1400 790
9200 7900 2200 460
110 330 700 58000
4600 300 330 700
460 24000
330 240000
330 230 170 14000
220 110 130 230
60 790 130 2300
790 70 40 13000

Geometric Mean
(#/100 ml.) 557
1955 480 2929 1102 751 5438 652 164 345 411.8

Sample Dates
11/01/1999 11/04/1999 11/15/1999 11/18/1999
11/01/1999 11/04/1999 11/15/1999 11/18/1999 11/01/1999 11/04/1999 11/15/1999 11/18/1999 11/02/1999 11/08/1999 11/16/1999 11/22/1999 09/08/1999 09/22/1999 09/29/1999 10/06/1999 11/08/1999 11/16/1999 11/22/1999 11/29/1999 09/08/1999 09/22/1999 09/29/1999 10/06/1999 09/08/1999 09/22/1999 09/29/1999 10/06/1999 09/07/1999 09/21/1999 09/28/1999 10/05/1999 09/08/1999 09/22/1999 09/29/1999 10/06/1999 11/19/1999 11/22/1999 12/08/1999 12/15/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
490 330 330 130

Geometric Mean
(#/100 ml.)
289

490 3500 1400 110
40 790 170 490
9200 3500 >24000 1300
330 260 11000 490
110 50 130 <20
1700 9200 5400 4600
110 3500 >24000 230
170 110 790 790
170 490 >24000 1300
80 20 80 330

719 227 5630 825 61 4440 1207 584 1270 80.6

Table A1 Water Quality Monitoring Data, Ocmulgee River Basin

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page A-5 of A-6

Stream/Segment
Stone Mountain Creek (Headwaters to Stone Mountain Lake)
Sugar Creek (U/s Memorial Drive to South River)
Sweetwater Creek (Lee Daniel Creek to Yellow River)
Swift Creek (Headwaters to Yellow River)
Tobesofkee Creek (Cole Creek to Todd Creek)
Tobesofkee Creek (Lake Tobesofkee to Rocky Creek)
Town Branch (D/S Jackson S. WPCP to Aboothlacoosta Cr.)
Turkey Creek (Headwaters to Yellow River)
Turnpike Creek (Hwy 280 to Sugar Creek)
Tussahaw Creek (Wolf Creek to Lake Jackson)
Walnut Creek (Headwaters to Ocmulgee River)
Watson Creek (Headwaters to Yellow River)

Sample Dates
03/11/1999 03/17/1999 03/23/1999 04/08/1999 02/11/1999 02/17/199 02/23/1999 03/03/1999 02/12/1999 02/16/1999 02/22/1999 03/05/1999 03/11/1999 03/17/1999 03/23/1999 04/08/1999 01/21/1999 01/26/1999 02/04/1999 02/16/1999 01/20/1999 01/28/1999 02/03/1999 02/17/1999 01/21/1999 01/26/1999 02/16/199 03/11/1999 03/17/1999 03/23/1999 04/08/1999 04/01/1999 04/08/1999 04/14/1999 04/21/1999 01/07/1999 01/13/1999 01/20/1999 02/04/1999 01/20/1999 01/28/1999 02/03/1999 02/17/1999 03/11/1999 03/17/1999 03/23/1999 04/08/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
230 70 20 50 1300 790 130 790 160 790 40 80 790 790 80 330 20 1300 790 490 20 80 700 20 220 490 330 <20 50 20 230 6400 110 490 110 490 220 20 170 20 3300 >24000 1100 80 <20 <20 80

Geometric Mean
(#/100 ml.) 63 570 142 358 317 69
46 441 138 1149 40

Sample Dates
05/06/1999 05/17/1999 05/20/1999 06/03/1999 04/07/1999 04/12/1999 04/19/1999 04/28/1999 04/08/1999 04/13/1999 04/20/1999 04/29/1999 05/06/1999 05/17/1999 05/20/1999 06/03/1999 03/30/1999 04/13/1999 04/20/1999 04/27/1999 03/31/1999 04/15/1999 04/22/1999 04/29/1999 03/30/1999 04/13/1999 04/22/1999 03/06/1999 03/17/1999 03/20/1999 04/03/1999
05/19/1999 07/28/1999 08/11/1999
04/06/1999 04/14/1999 04/21/1999 04/27/1999 03/31/1999 04/15/1999 04/22/1999 04/29/1999 05/06/1999 05/17/1999 05/20/1999 06/03/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
210 80 330 3500 330 700 790 92000 170 170 110 790 16000 730 230 >24000 90 50 50 230 20 50 50 130 330 7900 460 17000 330 490 330
160 170 <20
270 460 220 490 280 330 230 230 >24000 330 110 230

Geometric Mean
(#/100 ml.) 373 2024 224 1920 85 50
976

Sample Dates
07/08/1999 07/21/1999 07/27/1999 08/02/1999 06/09/1999 06/16/1999 06/23/1999 07/07/1999 06/10/1999 06/17/1999 06/24/1999 07/08/1999 07/08/1999 07/21/1999 07/27/1999 08/02/1999 06/22/1999 06/29/1999 07/13/1999 07/20/1999 06/24/1999 07/01/1999 07/15/1999 07/22/1999 07/20/1999 09/21/1999 10/19/1999 07/08/1999 07/21/1999 07/27/1999 08/02/1999

12/08/1999 12/15/1999

06/08/1999

340

06/15/1999 06/22/1999

07/06/1999

06/24/1999

264

07/01/1999 07/15/1999

07/22/1999

07/08/1999

669

07/21/1999 07/27/1999

08/02/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
230 70 790 700 790 790 790 2300 220 11000 700 490 490 3500 330 330 460 9200 170 4900 270 110 170 200 4900 35000 260 1700 790 270 490
20 110
330 230 330 330 2200 50 490 220 460 5400 170 330

Geometric Mean
(#/100 ml.) 307 1032 955 657 1370 178
649
302 330 611

Sample Dates
11/03/1999 11/09/1999 11/17/1999 11/23/1999 09/08/1999 09/22/1999 09/29/1999 10/06/1999 09/09/1999 09/23/1999 09/30/1999 10/07/1999 11/03/1999 11/09/1999 11/17/1999 11/23/1999 09/21/1999 09/28/1999 10/06/1999 10/19/1999 09/23/1999 09/30/1999 10/07/1999 10/21/1999
11/03/1999 11/09/1999 11/17/1999 11/23/1999
09/07/1999 09/21/1999 09/28/1999 10/05/1999 09/23/1999 09/30/1999 10/07/1999 10/21/1999 11/03/1999 11/09/1999 11/17/1999 11/23/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
490 20 50 50 330 1300 5400 2300 460 220 490 900 1100 110 210 230 700 460 110 50 230 1400 270 490

Geometric Mean
(#/100 ml.) 70
1519
460
276
205
454

200

170 80

356

490

230 5400 11000 1800
20 70 3500 130
490 50 50 20

2227 159 70

Table A1 Water Quality Monitoring Data, Ocmulgee River Basin

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page A-6 of A-6

Stream/Segment
Wise Creek (Headwaters to Kinnard Creek)
Yellow River (Big Haynes Creek to Jackson Lake) Yellow River (Hwy 124 to Big Haynes Creek)
Yellow River (Sweetwater Creek to Hwy 124)
Yellow Water Creek (1 mile d/s Stark Road)
Lake Jackson ("Newton, Butts, and Jasper Counties")

Sample Dates
01/21/1999 01/26/1999 02/04/1999 02/16/1999 01/07/1999 01/13/1999 01/20/1999 02/04/1999
02/12/1999 02/16/1999 02/22/1999 03/05/1999
01/21/1999 01/26/1999 02/04/1999 02/16/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
80 130 80 230 940 330 20 790

Geometric Mean
(#/100 ml.)
114
265

Sample Dates
03/30/1999 04/13/1999 04/20/1999 04/27/1999 04/06/1999 04/14/1999 04/21/1999 04/27/1999

170 270 66 50
50 490 790 2200

04/08/1999

111

04/13/1999 04/20/1999

04/29/1999

03/30/1999

454

04/13/1999 04/20/1999

04/27/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
50 460 50 330 50 80 220 80

Geometric Mean
(#/100 ml.)
140
92

Sample Dates
06/22/1999 06/29/1999 07/13/1999 07/20/1999 06/08/1999 06/15/1999 06/22/1999 07/06/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
330 170 330 490 790 330 80 330

210

06/10/1999

20 230

134

06/17/1999 06/24/1999

330

07/08/1999

80

06/22/1999

20 50

47

06/29/1999 07/13/1999

60

07/20/1999

330 11000
170 1100
790 9200 790 230

Geometric Mean
(#/100 ml.) 309 288
908
1072

Sample Dates
09/21/1999 09/28/1999 10/06/1999 10/19/1999 09/07/1999 09/21/1999 09/28/1999 10/05/1999
09/09/1999 09/23/1999 09/30/1999 10/07/1999
09/21/1999 09/28/1999 10/06/1999 10/19/1999

Fecal Coliform Bacteria
(MPN/100 ml.)
490 230 2200 50 1100 490 460 3000

Geometric Mean
(#/100 ml.)
334
929

170

170 310

329

1300

1300

110 <130

226

140

APPENDIX B: MODEL DEVELOPMENT AND CALIBRATION

B.1 Model Selection

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page B-1 of B-9

The Hydrological Simulation Program Fortran (HSPF) - Version 12.0 was selected to represent the hydrological conditions for the Ocmulgee River Basin. The watershed modeling provided a consistent hydrology and modeling framework for TMDL development in 2001. The Nonpoint Source Model Program (NPSM), a detailed graphical user interface (GUI), was used as the link between the user and HSPF.

B.2 Model Development

The watershed model represents the variability of nonpoint source contributions through dynamic representation of hydrology and land practices. The watershed model includes all point and nonpoint source contributions within the Ocmulgee River Basin. Key components of the watershed modeling included:

Watershed segmentation Meteorological data Simulation period Land use representation Hydrological representation USGS Flow Data

B.2.1 Watershed Segmentation

In order to evaluate the sources contributing to an impaired waterbody and to represent the spatial variability of these sources within the watershed model, the contributing drainage area was represented by a series of subwatersheds. These subwatersheds were represented using the Georgia 12-digit watershed data layer. In some situations, the 12-digit data layer required further subdivision for appropriate hydrological connectivity and representation.

Boundaries were constructed so that subwatershed "pour points" coincided, when possible, with water quality monitoring stations or USGS flow gages. Watershed delineation was based on the Rf3 stream coverage and Digital Elevation Model (DEM) data. This discretization allows management and load reduction alternatives to be varied by subwatershed. Initial input for model variables was developed using WCS and the associated spreadsheet tools.

B.2.2 Meteorological Data

An important factor influencing model results is the precipitation data contained in the meteorological data file used in the simulation. The pattern and intensity of rainfall affects the build-up and wash-off of fecal coliform bacteria from the land into the streams, as well as the dilution potential of the stream. Hourly data from weather stations within the boundaries of or in close proximity to the subwatersheds were applied to the watershed model. These data include precipitation, air temperature, dew point temperature, wind speed, cloud cover, evaporation, and solar radiation. These data are used directly, or calculated from the observed data.

Hourly precipitation data for numerous stations in and adjacent to the Ocmulgee River Basin were extracted from the EarthInfo CD set. After review of precipitation data and graphs, 5 precipitation stations were chosen for inclusion. This information was processed and patched, to construct a continuous period of record. The stations used are shown in Table B1. The 5 precipitation stations are shown in Figure B1. There were no data for the Jackson Dam station for the majority of 1997, 1998, and 1999. A distribution was determined from evaluation of regional stations. Annual magnitude was used from a nearby rain gage that is part of the Georgia Environmental Monitoring Network system.

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page B-2 of B-9
Meteorological data, other than precipitation, was used from two stations in or near to the project study watershed area. The data from these meteorological stations were assigned, using engineering judgment, to each of the 5 precipitation stations. The data from meteorological stations area applied to the precipitation stations are shown in Table B2. The two meteorological stations are shown in Figure B1 as HUSWO and SAMSON sites.
Cloud cover data was incomplete for the period 1996 to 1999. The solution for this missing data was to evaluate the annual total rainfall values for the period of record of the meteorological stations. It was assumed that the cloud cover data from a prior year with a similar annual rainfall value would be representative.
Figure B1 Location of Precipitation and Meteorological Stations

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page B-3 of B-9
Table B1 - Precipitation Stations and Associated Patching Stations

WDM File Station Number 01 02 11 16 17

Description
Abbeville 4 S Atlanta Hartsfield Macon Lewis B Wilson
The Rock Jackson Dam

Station ID
GA0010 GA0451 GA5443 GA8657 GA4623

Stations Used to Patch the WDM File Station
GA2728, GA2844, GA4204 GA2578, GA4070, GA5974 GA2844, GA5876, GA8657 GA4070, GA5443, GA5974 GA0451, GA4070, GA8657, GA5443, GA5876, GA5974

Table B2 Meteorological Stations Used at Each Precipitation Station

WDM File Station Number 01 02 11 16 17

Description
Abbeville 4 S Atlanta Hartsfield Macon Lewis B Wilson
The Rock Jackson Dam

Station ID
GA0010 GA0451 GA5443 GA8657 GA4623

Station Used for Meteorological Data at the WDM File Precipitation Stations
GA5443, Macon Lewis B Wilson GA0451, Atlanta Hartsfield GA5443, Macon Lewis B Wilson GA5443, Macon Lewis B Wilson GA0451, Atlanta Hartsfield

B.2.3 Simulation Period
EPA recommends looking at an extended time period for hydrology calibrations. This is due to the fact that over an extended period, a variety of hydrological conditions will exist, and a model that is calibrated over this time period will have a greater chance of success in predicting future hydrological conditions. The hydrological models were calibrated from October 1, 1994 through December 31, 1999. In 1999, there was a comprehensive water quality data set that was collected for the Ocmulgee River Basin.
B.2.4 Land Use Representation
The watershed model uses land use data as the basis for representing hydrology and nonpoint source loading. Land use categories for modeling were selected based on the USGS Multi-Resolution Landuse Classification (MRLC) data set, and included built-up, forest, cropland, pasture, and wetlands. The USGS data represents conditions in the early to middle 1990's. The modeling categories and their corresponding USGS classifications are presented in Table B3.
The HSPF model requires division of land uses in each subwatershed into separate pervious and impervious land units. For each land use, this division can be made based on typical imperviousness percentages from individual land use categories, such as those used in the Soil Conservation Service's TR-55 method. For modeling purposes, the percent imperviousness of a given land category can be calculated as an area-weighted average of land use classes encompassing the modeling land category.

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page B-4 of B-9

Table B3 Land Use Representation

Land Categories Represented in
the Model Built-up
Forest Forest
Wetland Cropland
Pasture

MRLC Land Use Code
21 22 23 33
31 32 41 42 43 51 52 53 71 85
91 92
61 82 83 84
81

MRLC Land Use Classes
Low Intensity Residential High Intensity Residential High Intensity Comm./Ind./Trans.
Transitional
Bare Rock/Sand/Clay Quarries/Strip Mines/Gravel Pits
Deciduous Forest Evergreen Forest
Mixed Forest Deciduous Shrubland Evergreen Shrubland
Mixed Shrubland Grassland/Herbaceous
Other Grasses
Woody Wetlands Emergent Herbaceous Wetlands
Planted/Cultivated Row Crops Small Grains Bare Soil
Pasture/Hay

% Impervious
19 65 80 10
0 0 0 0 0 0 0 0 0 0
0 0
0 0 0 0
0

B.2.5 Hydrological Representation
Watershed hydrology plays an important role in the determination of nonpoint source flow and ultimately nonpoint source loadings to a waterbody. The watershed model must appropriately represent the spatial and temporal variability of hydrological characteristics within a watershed. Key hydrological characteristics include interception storage capacities, infiltration properties, evaporation and transpiration rates, and watershed slope and roughness. The HSPF modules used to represent watershed hydrology for TMDL development included PWATER (water budget simulation for pervious land units) and IWATER (water budget simulation for impervious land units).
During the hydrologic calibration process, model parameters were adjusted within reasonable constraints until an acceptable agreement was achieved between simulated and observed stream flow. Model parameters adjusted included: evapotranspiration, infiltration, upper and lower zone storage, groundwater storage, recession rates, losses to the deep groundwater system, and interflow discharge.
B.2.6 USGS Flow Data
There are 25 historical USGS flow stations in the Georgia Middle 3 Basins that contained complete flow data from January 1, 1990 through December 31, 1999. Of those 25 historical flow stations, 1 station was used for model

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page B-5 of B-9
calibration and 5 stations were used for model validation (Refer to Table C1 in Appendix C).
B.3 Model Organization
The main division within the modeling schematic for the Ocmulgee River Basin is the 8-digit HUC number. The Ocmulgee River Basin is comprised of 3 HUCs, 03070103 (Upper Ocmulgee), 03070104 (Lower Ocmulgee), and 03070105 (Little Ocmulgee). Within each of these HUCs, individual projects were created that identify and appropriately model the subwatersheds within each HUC. There are 21 projects within the Upper Ocmulgee HUC, 5 projects within the Lower Ocmulgee HUC, and 2 projects within the Little Ocmulgee HUC.
The development of the modeling schematic for each HUC in the Ocmulgee River Basin is provided in Appendix G. The information included for each HUC includes:
Tables of 303(d) Listed Segments located within each 8-digit HUC for Fecal Coliform and their associated project names,
Modeling schematic of each 8-digit HUC, Location of Projects within each 8-digit HUC, Subwatershed ID Numbering for each of the Projects, Location of the Active Point Sources that were included within each 8-digit HUC, Location of the 1999 Monitoring Stations that were included within each 8-digit HUC, Project Summary Sheets.
There is one project summary sheet for each project contained in the 8-digit HUC. These sheets contain all of the information about each of the subwatersheds contained within each individual project.
B.4 Model Calibration
The calibration of the NPSM watershed model involves both hydrology and water quality components. The model must be calibrated to appropriately represent hydrologic response in the watershed before subsequent calibrations and reasonable water quality simulations can be performed.
B.4.1 Hydrologic Calibration
The hydrology calibration of the watershed model involved comparing simulated stream flows to historic stream flow data from a USGS stream gaging station for the same period of time.
Initial values for hydrological variables were taken from an EPA developed default data set. During the calibration process, model parameters were adjusted within reasonable constraints until acceptable agreement was achieved between simulated and observed stream flow. Model parameters adjusted include: evapotranspiration, infiltration, upper and lower zone storage, groundwater storage, recession, losses to the deep groundwater system, and interflow discharge. Measures which can reduce urban contributions include: repair and renovation of leaking sewer collection systems; reduction of sewer overflows and surcharges by use of separate conduit systems for domestic wastewater and stormwater; encouraging households and businesses to connect to public sewer systems and reduce the population using septic systems.
Calibrated models were then subjected to model validation to ensure that generated model streamflows for each of the impaired segments were acceptable. Model generated hydrographs for each of the impaired streams are presented in Appendix D.
Within the Piedmont region (above the GA Fall Line), the hydrological parameters were calibrated using the USGS

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page B-6 of B-9
flow gage 02204070 South River at Klondike Road, which is located in the Upper Ocmulgee Basin (Refer to Table C1 in Appendix C). Typically, a 10-year calibration is performed on the watershed model, however, in this case only a 5.2-year calibration was performed. This is due to the fact that this area is dominated by combined sewer overflows (CSOs), and data for the CSOs only date back to October 1, 1994. Therefore, the calibration on the hydrological parameters above the GA fall line was from October 1, 1994 to December 21, 1999.
B.4.2 Model Validation
An important step of the modeling process is model validation. Model validation is the process of taking the hydrological parameters that have been calibrated, applying those parameters to other watersheds, and comparing the simulated flow to measured flow from a USGS stream gaging station for the same period of time. Model validation is sometimes called model verification, as essentially you are validating or verifying that hydrological parameters calibrated in one watershed will produce acceptable results in another watershed. It is important that when selecting watersheds to perform validations, those watersheds represent a wide variety of landuses as well as drainage areas. This will help to ensure that the hydrological parameters that were calibrated apply to a wide range of conditions. Every validation was carried over an extended multi-year period.
For the hydrological parameters calibrated above the fall line, validations were performed at 6 other watersheds. Table C1 (Appendix C) summarizes the calibration station and validation stations for above the fall line. For the hydrological parameters calibrated below the fall line, validations were performed at 4 other watersheds. Table C2 (Appendix C) summarizes the calibration station and validation stations for below the fall line.
B.5 Water Quality Calibration
Ocmulgee River Basin data, generated by WCS, was processed through the spreadsheet applications developed by Tetra Tech, Inc. to generate fecal coliform loading data for use as initial input to the NPSM model.
The figures presented in Appendix F show the resulting 30-day geometric mean results for the existing and TMDL conditions for the modeled period. The existing conditions results provided the basis for selection of the 30-day critical conditions period for the TMDL modeling.
B.5.1 Point Sources
For existing conditions, NPDES facilities located in modeled subwatersheds are represented as point sources of constant flow and concentration based on the facility's average flow and effluent fecal coliform concentration as reported on DMRs (see Table 6).
A.5.2 Nonpoint Sources
A number of nonpoint source categories are not associated with land loading processes and are represented as direct, instream source contributions in the model. These may include, but are not limited to, failing septic systems, leaking sewer lines, animals in streams, direct discharge of raw sewage, and undefined sources. All other nonpoint sources involve land loading of fecal coliform bacteria and washoff as a result of storm events. Only a portion of the load from these sources are actually delivered to streams due to the mechanisms of washoff (efficiency), decay, and incorporation into soil (adsorption, absorption, filtering) before being transported to the stream. Therefore, land loading nonpoint sources are represented as indirect contributions to the stream. Buildup, washoff, and die-off rates are dependent on seasonal and hydrologic processes.
Initial input for nonpoint sources of fecal coliform loading in the water quality model was developed using

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page B-7 of B-9
watershed information generated with WCS and the Tetra Tech loading calculation spreadsheets.

B.5.2.1

Wildlife

Fecal coliform loading from wildlife is considered to be uniformly distributed to forest, pasture, cropland, and wetland areas in the modeled subwatersheds. A loading rate of 5.0 x 108 counts/animal/day for deer is based on
best professional judgment (BPJ) of EPA. An animal density of 45 animals/square mile is used to account for deer and all other wildlife. The resulting fecal coliform loading is 2.5 x 106 counts/acre/day and is considered
background.

B.5.2.2

Land Application of Agricultural Manure

In the water quality model, county livestock populations (see Table 7) are distributed to subwatersheds based on the percentage of agricultural area in each subwatershed classified as pasture/hay. Fecal coliform loading rates were calculated from livestock populations based on manure application rates, literature values for bacteria concentrations in livestock manure, and the following assumptions:

Fecal content in manure was adjusted to account for die-off due to known treatment/storage methods.

Manure application rates from the various animal sources vary monthly according to management practices. Hog manure and chicken litter are applied from March through October; beef cattle manure is applied throughout the year; dairy cow manure is applied from February through October as well as in December.

The fraction of manure available for runoff is dependent on the method of manure application. In the water quality model, the fraction available is estimated based on incorporation into the soil.

In Georgia, manure is generally not applied to cropland, only pastureland.
Fecal coliform production rates used in the model are 1.04 x 1011 counts/day/dairy cow, 1.22 x 1010 counts/day/sheep, 1.98 x 108 counts/day/chicken layer, and 2.4 x 108 counts/day/chicken (Metcalf and Eddy, 1991).

Since manure is not applied to cropland in the Ocmulgee River Basin, the only source of fecal coliform bacteria from cropland is from wildlife that deposits feces on the land surface. The in-stream loading from cropland is considered background.

B.5.2.3

Grazing Animals

Cattle spend time grazing on pastureland and deposit feces onto the land. During storm events, a portion of this material containing fecal coliform bacteria is transported to streams. Beef cattle are assumed to spend all their time in pasture. The percentage of feces deposited during grazing time is used to estimate fecal coliform loading rates from pastureland. Because there is no assumed monthly variation in animal access to pastures, the fecal loading rate does not vary significantly throughout the year. Therefore, the loading rate to pastureland from grazing animals used in the model is assumed to be constant. Contributions of fecal coliform from wildlife (as noted in Section B.5.2.1) are also included in these rates.

B.5.2.4

Urban Development

Urban land use represented in the MRLC database includes areas classified as: high intensity commercial, industrial, transportation, low intensity residential, high intensity residential, and transitional. Associated with each

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page B-8 of B-9
of these classifications a percent of the land area that is impervious. A single, area-weighted loading rate from urban areas is used in the model and is based on the percentage of each urban land use type in the watershed and build-up and accumulation rates referenced in Horner (1992). In the water quality calibrated model, this rate varies from 7.5 x 109 to 2.5 x 1010 counts/acre-day and is assumed constant throughout the year.

B.5.2.5

Other Sources

As previously stated, there are a number of nonpoint sources of fecal coliform bacteria that are not associated with land loading and washoff processes. These include animal access to streams, failing septic systems, leaking sewer lines, illicit discharges, and other undefined sources. In each subwatershed, all of these miscellaneous sources have been grouped together and modeled as a point source of constant flow and fecal coliform concentration. The initial baseline values of flow and concentration were estimated using the Tetra Tech, Inc. developed spreadsheets and the following assumptions:

The load attributed to animals having access to streams is initially based on the beef cow population in

the watershed. It was assumed that 50% have access to streams and, of those, 25% defecate in or near

the stream banks during a short portion of the day. The resulting percentage of time fecal coliform

bacteria is discharged into the streams from grazing cattle is 0.025%. Literature values were used to

estimate the fecal coliform bacteria concentration in beef cow manure.

The initial baseline loads attributable to leaking septic systems is based on an assumed failure rate of 5

percent. This rate was selected based on a survey conducted by EPD that included all counties within

the Ocmulgee River Basin watersheds that had septic system failure data.

These flow and concentration variables were adjusted during water quality calibration to alter simulated instream fecal concentrations during dry weather conditions.

B.5.3 Water Quality Calibration Results

During water quality calibration, model parameters were adjusted within reasonable limits until acceptable agreement between simulation output and instream observed data was achieved. Model variables adjusted include:

Rate of fecal coliform bacteria accumulation

Maximum storage of fecal coliform bacteria

Rate of surface runoff that will remove 90% of stored fecal coliform bacteria

Concentration of fecal coliform bacteria in interflow

Concentration of fecal coliform bacteria in groundwater

Concentration of fecal coliform bacteria and rate of flow of "other direct sources" described in Section

B.5.2.5

The portion of the each impaired stream segment modeled for each water quality calibration represented the drainage area upstream of the monitoring station. A comparison of simulated and observed daily fecal coliform concentrations at sampling stations in the 303(d) listed streams are presented in Appendix E. Results show that the model adequately simulates peaks in fecal coliform bacteria in response to rainfall events. Often a high

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page B-9 of B-9
observed value is not simulated in the model due to lack of rainfall at the meteorological station as compared to the rainfall occurring in the watershed, or is the result of an unknown source that is not included in the model.

APPENDIX C: HYDROLOGY CALIBRATIONS

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-1 of C-18
Table C1 - Calibration and Validation Stations for Hydrological Parameters Above the GA Fall Line (Piedmont)

Station Number 02204070 02219000 02217500 02220900 02221525 02208450 02213000

Station Name
South River at Klondike Road Apalachee River near Bostwick, GA Middle Oconee River near Athens, GA Little River near Eatonton, GA Murder Creek Below Eatonton, GA Alcovy River above Covington, GA Ocmulgee River at Macon, GA

Type Calibration Validation Validation Validation Validation Validation Validation

Drainage Area (acres) 117978 119738 252006 174445 121690 122720 1450880

Reference WDM station Atlanta Hartsfield Monroe Jefferson Milledgeville Milledgeville Monroe Macon Lewis

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-2 of C-18

# 02217500 # 02219000 02204070 %U # 02208450
02220900
#
02221525 #

%U Calibr ation S tatio ns # V alidation Stations Cataloging Uni t B ound ari es
A L TA M AH A LITTLE O CMULGE E LOW E R OCMULGEE LOW E R O CO NE E OHOOPEE UPP ER O CM ULG EE UPPER OCONEE

# 02213000 # 02223500

02225500
%U

#
02215500

#
02225000

#

N

02226000

W

E

S

50

0

50

100 Miles

Figure C.1. Location of Hydrology Calibration and Validation Stations

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-3 of C-18

Total Rainfall (in)

Flow (cfs)

12000 10000 8000 6000 4000 2000
0 10/1/94

TotalRainfal (in) 10/1/95

Observed Flow

Modeled Flow

10/1/96

10/1/97
Time

10/1/98

0 1 2 3 4 5 6 7 8 9 10 10/1/99

Figure C.2. 5.2-Year Calibration (Daily Flow) at 02204070 South River at Klondike Road.

Average Observed Flow (cfs) Flow (cfs)

5.2-Year Flow Comparison for 02204070 (10/1/1994 to 12/31/1999)

Avg Flow (10/1/1994 to 12/31/1999) One-to-one line Best-fit line
700

600

y = 0.9932x + 10.765 R2 = 0.9557

500

400

300

200

100

0 0 100 200 300 400 500 600 700
Average Modeled Flow (cfs)

Avg Monthly Rainfall (in) Avg Observed Flow (10/1/1994 to 12/31/1999) Avg Modeled Flow (Same Period)

700

0

ON D J FMA M J J AS

1

600

2

500

3

400

4

5

300

6

200

7

8 100
9

0

10

10 11 12 1 2 3 4 5 6 7 8 9

Month

Figure C.3. Road.

5.2-Year Calibration (Monthly Average) at 02204070 South River at Klondike

Monthly Rainfall (in)

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-4 of C-18
5.2-Year Flow Comparison for 02204070 (10/1/1994 to 12/31/1999)

Average Monthly Rainfall (in)

Median Observed Flow (10/1/1994 to 12/31/1999)

800

O

N

D

J

F

M

700

Observed (25th, 75th) Modeled (Median, 25th, 75th)

A

M

J

J

A

600

500

400

300

200

100

0

10

11

12

1

2

3

4

5

6

7

8

Month

0 S
1 2 3
4 5 6
7 8 9
10 9

Flow (cfs) Monthly Rainfall (in)

Figure C.4. Road.

5.2-Year Calibration (Monthly Medians) at 02204070 South River at Klondike

Simulation Name:
Period for Flow Analysis Begin Date: End Date:
Total Simulated In-stream Flow:
Total of highest 10% flows: Total of lowest 50% flows:
Simulated Summer Flow Volume ( months 7-9): Simulated Fall Flow Volume (months 10-12): Simulated Winter Flow Volume (months 1-3): Simulated Spring Flow Volume (months 4-6):
Total Simulated Storm Volume: Simulated Summer Storm Volume (7-9):
Errors (Simulated-Observed) Error in total volume: Error in 50% lowest flows: Error in 10% highest flows: Seasonal volume error - Summer: Seasonal volume error - Fall: Seasonal volume error - Winter: Seasonal volume error - Spring: Error in storm volumes: Error in summer storm volumes:

02204070
10/01/94 12/31/99
127.39
50.64 27.00
19.70 33.85 50.13 23.70
85.31 9.62
-2.40 2.25 -14.92 6.87 0.65 -1.24 -16.90 -14.94 -10.85

Simulation Period: Watershed Area (ac):
Baseflow PERCENTILE: Usually 1%-5%
Total Observed In-stream Flow:
Total of Observed highest 10% flows: Total of Observed Lowest 50% flows:
Observed Summer Flow Volume (7-9): Observed Fall Flow Volume (10-12): Observed Winter Flow Volume (1-3): Observed Spring Flow Volume (4-6):
Total Observed Storm Volume: Observed Summer Storm Volume (7-9):
Recommended Criteria 10 10 15 30 30 30 30 20 50

117978
2.5
130.44
58.20 26.39
18.35 33.63 50.76 27.71
98.06 10.67
Last run

Figure C.5. 5.2-Year Calibration Statistics at 02204070 South River at Klondike Road.

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-5 of C-18

Total Rainfall (in)

Flow (cfs)

2500 2000 1500 1000 500
0 1/1/99

Total Rainfall (in)

2/1/99 3/1/99

4/1/99 5/1/99

Observed Flow

6/1/99

7/1/99

8/1/99

Time

Modeled Flow 9/1/99 10/1/99 11/1/99 12/1/99

0 1 2 3 4 5 6 7 8 9 10 1/1/00

Figure C.6. Calendar Year 1999 (Daily Flow) at 02204070 South River at Klondike Road.

Average Observed Flow (cfs)

400 350 300 250 200 150 100
50 0 0

Year 1999 Monthy Flow Budget Line of Equal Value Best-fit line
y = 1.0658x - 27.269 R2 = 0.4824

100

200

300

400

Average Modeled Flow (cfs)

Average Observed Flow (cfs)

Year 1999 Weekly Flow Budget Line of Equal Value Best-fit line

800

y = 1.0459x - 23.575

700

R2 = 0.7004

600

500

400

300

200

100

0

0

200

400

600

800

Average Modeled Flow (cfs)

Average Flow (cfs)

Rainfall (in) 400

1999 Observed

Modeled 0

J 350

F MAM

J

J

A S OND

1

2

300

3

250

4

200

5

150

6

7

100

8

50

9

0

10

1 2 3 4 5 6 7 8 9 10 11 12
Month

Total Rainfall (in) Average Flow (cfs)

Rainfall (in)

1999 Observed

Modeled

800

0

J FM 700

AMJ

J AS

OND

1

2 600
3

500

4

400

5

300

6

7

200

8

100

9

0

10

1 5 10 14 18 22 27 31 35 39 44 48 52

Week

Figure C.7. Road.

Calendar Year 1999 (Monthly and Weekly) at 02204070 South River at Klondike

Total Rainfall (in)

Simulation Name:
Selected a Year for Flow Analysis: Type of Year (1=Calendar, 2=Water Year)
Calendar Year 1999: 1/1/1999 to 12/31/1999 Total Simulated In-stream Flow:
Total of highest 10% flows: Total of lowest 50% flows:
Simulated Summer Flow Volume ( months 7-9): Simulated Fall Flow Volume (months 10-12): Simulated Winter Flow Volume (months 1-3): Simulated Spring Flow Volume (months 4-6):
Total Simulated Storm Volume: Simulated Summer Storm Volume (7-9):
Errors (Simulated-Observed) Error in total volume: Error in 50% lowest flows: Error in 10% highest flows: Seasonal volume error - Summer: Seasonal volume error - Fall: Seasonal volume error - Winter: Seasonal volume error - Spring: Error in storm volumes: Error in summer storm volumes:

02204070
1999 1
15.43
4.80 4.55
3.51 3.47 4.30 4.15
7.54 1.52
6.63 16.82 -6.11 31.30 -0.75 -12.36 11.63 -27.51 20.76

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-6 of C-18

Simulation Period: Watershed Area (ac):
Baseflow PERCENTILE: Usually 1%-5%
Total Observed In-stream Flow:
Total of Observed highest 10% flows: Total of Observed Lowest 50% flows:
Observed Summer Flow Volume (7-9): Observed Fall Flow Volume (10-12): Observed Winter Flow Volume (1-3): Observed Spring Flow Volume (4-6):
Total Observed Storm Volume: Observed Summer Storm Volume (7-9):
Recommended Criteria 10 10 15 30 30 30 30 20 50

117978
2.5
14.41
5.09 3.79
2.41 3.50 4.83 3.67
9.61 1.21
Last run

Figure C.8. Calendar Year 1999 Statistics at 02204070 South River at Klondike Road.

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-7 of C-18

Total Rainfall (in)

Flow (cfs)

TotalRainfal (in)

Observed Flow

Modeled Flow

12000

0

1

10000

2

8000

3

4

6000

5

6

4000

7

2000

8

9

0

10

1/1/90

1/1/91

1/1/92

1/1/93

1/1/94

1/1/95

1/1/96

1/1/97

1/1/98

1/1/99

1/1/00

Time

Figure C.9. 10-Year Validation (Daily Flow) at 02219000 Apalachee River near Bostwick, GA.

Monthly Rainfall (in)

Average Observed Flow (cfs) Flow (cfs)

10-Year Flow Comparison for 02219000 (1/1/1990 to 12/31/1999)

700 600 500 400 300 200 100
0 0

Avg Flow (1/1/1990 to 12/31/1999) One-to-one line Best-fit line
y = 0.8803x + 5.1517 R2 = 0.9627
100 200 300 400 500 600 700
Average Modeled Flow (cfs)

Avg Monthly Rainfall (in) Avg Observed Flow (1/1/1990 to 12/31/1999) Avg Modeled Flow (Same Period)

700

0

J FMAM J J A SON D

1

600

2

500

3

400

4

5

300

6

200

7

8 100
9

0

10

1 2 3 4 5 6 7 8 9 10 11 12

Month

Figure C.10. 10-Year Validation (Monthly Average) at 02219000 Apalachee River near Bostwick, GA.

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-8 of C-18

10-Year Flow Comparison for 02219000 (1/1/1990 to 12/31/1999)

Average Monthly Rainfall (in)

Median Observed Flow (1/1/1990 to 12/31/1999)

700

J

F

M

A

M

J

600

Observed (25th, 75th) Modeled (Median, 25th, 75th)

J

A

S

O

N

500

400

300

200

100

0

1

2

3

4

5

6

7

8

9

10

11

Month

0 D
1 2 3
4 5 6
7 8 9
10 12

Flow (cfs) Monthly Rainfall (in)

Figure C.11. 10-Year Validation (Monthly Medians) at 02219000 Apalachee River near Bostwick, GA.

Simulation Name:
Period for Flow Analysis Begin Date: End Date:
Total Simulated In-stream Flow:
Total of highest 10% flows: Total of lowest 50% flows:
Simulated Summer Flow Volume ( months 7-9): Simulated Fall Flow Volume (months 10-12): Simulated Winter Flow Volume (months 1-3): Simulated Spring Flow Volume (months 4-6):
Total Simulated Storm Volume: Simulated Summer Storm Volume (7-9):
Errors (Simulated-Observed) Error in total volume: Error in 50% lowest flows: Error in 10% highest flows: Seasonal volume error - Summer: Seasonal volume error - Fall: Seasonal volume error - Winter: Seasonal volume error - Spring: Error in storm volumes: Error in summer storm volumes:

02219000
01/01/90 12/31/99
217.08
90.29 35.38
36.16 44.03 90.27 46.62
185.93 28.43
10.33 -6.21 13.01 18.93 7.60 10.10 6.66 12.36 24.43

Simulation Period: Watershed Area (ac):
Baseflow PERCENTILE: Usually 1%-5%
Total Observed In-stream Flow:
Total of Observed highest 10% flows: Total of Observed Lowest 50% flows:
Observed Summer Flow Volume (7-9): Observed Fall Flow Volume (10-12): Observed Winter Flow Volume (1-3): Observed Spring Flow Volume (4-6):
Total Observed Storm Volume: Observed Summer Storm Volume (7-9):
Recommended Criteria 10 10 15 30 30 30 30 20 50

119738
2.5
194.66
78.55 37.57
29.31 40.69 81.15 43.51
162.94 21.48
Last run

Figure C.12. 10-Year Validation Statistics at 02219000 Apalachee River near Bostwick, GA.

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-9 of C-18

Total Rainfall (in)

Flow (cfs)

TotalRainfal (in)

Observed Flow

Modeled Flow

16000

0

14000

1

2 12000
3

10000

4

8000

5

6000

6

7 4000
8

2000

9

0

10

1/1/90

1/1/91

1/1/92

1/1/93

1/1/94

1/1/95

1/1/96

1/1/97

1/1/98

1/1/99

1/1/00

Time

Figure C.13. 10-Year Validation (Daily Flow) at 02217500 Middle Oconee River near Athens, GA.

Average Observed Flow (cfs) Flow (cfs)

10-Year Flow Comparison for 02217500 (1/1/1990 to 12/31/1999)

Avg Flow (1/1/1990 to 12/31/1999) One-to-one line Best-fit line
1500

1200

y = 0.9099x + 23.211 R2 = 0.9874

900

600

300

0

0

300

600

900

1200

1500

Average Modeled Flow (cfs)

Avg Monthly Rainfall (in)

Avg Observed Flow (1/1/1990 to 12/31/1999)

Avg Modeled Flow (Same Period)

1500

0

J FMAM J J ASOND

1

1200

2

3

900

4

5

600

6

7

300

8

9

0

10

1 2 3 4 5 6 7 8 9 10 11 12

Month

Figure C.14. 10-Year Validation (Monthly Average) at 02217500 Middle Oconee River near Athens, GA.

Monthly Rainfall (in)

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-10 of C-18

Flow (cfs) Monthly Rainfall (in)

10-Year Flow Comparison for 02217500 (1/1/1990 to 12/31/1999)

Average Monthly Rainfall (in)

Median Observed Flow (1/1/1990 to 12/31/1999)

1600

J

F

M

A

M

J

1400

Observed (25th, 75th) Modeled (Median, 25th, 75th)

J

A

S

O

N

1200

1000

800

600

400

200

0

1

2

3

4

5

6

7

8

9

10

11

Month

0 D
1 2 3
4 5 6
7 8 9
10 12

Figure C.15. 10-Year Validation (Monthly Medians) at 02217500 Middle Oconee River near Athens, GA.

Simulation Name:
Period for Flow Analysis Begin Date: End Date:
Total Simulated In-stream Flow:
Total of highest 10% flows: Total of lowest 50% flows:
Simulated Summer Flow Volume ( months 7-9): Simulated Fall Flow Volume (months 10-12): Simulated Winter Flow Volume (months 1-3): Simulated Spring Flow Volume (months 4-6):
Total Simulated Storm Volume: Simulated Summer Storm Volume (7-9):
Errors (Simulated-Observed) Error in total volume: Error in 50% lowest flows: Error in 10% highest flows: Seasonal volume error - Summer: Seasonal volume error - Fall: Seasonal volume error - Winter: Seasonal volume error - Spring: Error in storm volumes: Error in summer storm volumes:

02217500
01/01/90 12/31/99
216.24
86.28 38.25
28.67 41.92 91.48 54.17
175.96 18.50
5.33 -9.30 8.69 3.89 -0.74 5.69 10.19 4.99 0.61

Simulation Period: Watershed Area (ac):
Baseflow PERCENTILE: Usually 1%-5%
Total Observed In-stream Flow:
Total of Observed highest 10% flows: Total of Observed Lowest 50% flows:
Observed Summer Flow Volume (7-9): Observed Fall Flow Volume (10-12): Observed Winter Flow Volume (1-3): Observed Spring Flow Volume (4-6):
Total Observed Storm Volume: Observed Summer Storm Volume (7-9):
Recommended Criteria 10 10 15 30 30 30 30 20 50

252006
2.5
204.71
78.78 41.80
27.55 42.23 86.27 48.65
167.18 18.39
Last run

Figure C.16. 10-Year Validation Statistics at 02217500 Middle Oconee River near Athens, GA.

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-11 of C-18

Total Rainfall (in)

Flow (cfs)

TotalRainfal (in)

Observed Flow

Modeled Flow

12000

0

1

10000

2

8000

3

4

6000

5

6

4000

7

2000

8

9

0

10

1/1/90

1/1/91

1/1/92

1/1/93

1/1/94

1/1/95

1/1/96

1/1/97

1/1/98

1/1/99

1/1/00

Time

Figure C.17. 10-Year Validation (Daily Flow) at 02220900 Little River near Eatonton, GA.

Monthly Rainfall (in)

Average Observed Flow (cfs) Flow (cfs)

10-Year Flow Comparison for 02220900 (1/1/1990 to 12/31/1999)

Avg Flow (1/1/1990 to 12/31/1999) One-to-one line Best-fit line
1000

800

y = 0.9081x - 77.556

R2 = 0.9679

600

400

200

0

0

200

400

600

800

1000

Average Modeled Flow (cfs)

Avg Monthly Rainfall (in)

Avg Observed Flow (1/1/1990 to 12/31/1999)

Avg Modeled Flow (Same Period)

1000

0

J FMAM J J ASOND

1

800

2

3

600

4

5

400

6

7

200

8

9

0

10

1 2 3 4 5 6 7 8 9 10 11 12

Month

Figure C.18. 10-Year Validation (Monthly Average) at 02220900 Little River near Eatonton, GA.

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-12 of C-18

10-Year Flow Comparison for 02220900 (1/1/1990 to 12/31/1999)

Flow (cfs) Monthly Rainfall (in)

Average Monthly Rainfall (in)

Median Observed Flow (1/1/1990 to 12/31/1999)

1200

J

F

M

A

M

J

1000

Observed (25th, 75th) Modeled (Median, 25th, 75th)

J

A

S

O

N

800

600

400

200

0

1

2

3

4

5

6

7

8

9

10

11

Month

0 D
1 2 3
4 5 6
7 8 9
10 12

Figure C.19. 10-Year Validation (Monthly Medians) at 02220900 Little River near Eatonton, GA.

Simulation Name:
Period for Flow Analysis Begin Date: End Date:
Total Simulated In-stream Flow:
Total of highest 10% flows: Total of lowest 50% flows:
Simulated Summer Flow Volume ( months 7-9): Simulated Fall Flow Volume (months 10-12): Simulated Winter Flow Volume (months 1-3): Simulated Spring Flow Volume (months 4-6):
Total Simulated Storm Volume: Simulated Summer Storm Volume (7-9):
Errors (Simulated-Observed) Error in total volume: Error in 50% lowest flows: Error in 10% highest flows: Seasonal volume error - Summer: Seasonal volume error - Fall: Seasonal volume error - Winter: Seasonal volume error - Spring: Error in storm volumes: Error in summer storm volumes:

02220900
01/01/90 12/31/99
197.17
77.93 34.87
29.53 38.32 87.78 41.54
162.94 20.93
28.89 45.86 13.84 48.64 27.66 20.74 33.20 19.11 37.52

Simulation Period: Watershed Area (ac):
Baseflow PERCENTILE: Usually 1%-5%
Total Observed In-stream Flow:
Total of Observed highest 10% flows: Total of Observed Lowest 50% flows:
Observed Summer Flow Volume (7-9): Observed Fall Flow Volume (10-12): Observed Winter Flow Volume (1-3): Observed Spring Flow Volume (4-6):
Total Observed Storm Volume: Observed Summer Storm Volume (7-9):
Recommended Criteria 10 10 15 30 30 30 30 20 50

174445
2.5
140.21
67.14 18.88
15.17 27.72 69.58 27.75
131.80 13.08
Last run

Figure C.20. 10-Year Validation Statistics at 02220900 Little River near Eatonton, GA.

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-13 of C-18

Total Rainfall (in)

Flow (cfs)

TotalRainfal (in)

Observed Flow

Modeled Flow

8000

0

7000

1

2 6000
3

5000

4

4000

5

3000

6

7 2000
8

1000

9

0

10

1/1/90

1/1/91

1/1/92

1/1/93

1/1/94

1/1/95

1/1/96

1/1/97

1/1/98

1/1/99

1/1/00

Time

Figure C.21. 10-Year Validation (Daily Flow) at 02221525 Murder Creek below Eatonton, GA.

Monthly Rainfall (in)

Average Observed Flow (cfs) Flow (cfs)

10-Year Flow Comparison for 02221525 (1/1/1990 to 12/31/1999)

Avg Flow (1/1/1990 to 12/31/1999) One-to-one line Best-fit line
600

500

y = 0.8671x - 31.462 R2 = 0.9755

400

300

200

100

0

0

100

200

300

400

500

600

Average Modeled Flow (cfs)

Avg Monthly Rainfall (in)

Avg Observed Flow (1/1/1990 to 12/31/1999)

Avg Modeled Flow (Same Period)

800

0

J FMAM J J A SON D

700

1

2 600
3

500

4

400

5

300

6

7 200
8

100

9

0

10

1 2 3 4 5 6 7 8 9 10 11 12

Month

Figure C.22. 10-Year Validation (Monthly Average) at 02221525 Murder Creek below Eatonton, GA.

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-14 of C-18

10-Year Flow Comparison for 02221525 (1/1/1990 to 12/31/1999)

Average Monthly Rainfall (in)

Median Observed Flow (1/1/1990 to 12/31/1999)

700

J

F

M

A

M

J

600

Observed (25th, 75th) Modeled (Median, 25th, 75th)

J

A

S

O

N

500

400

300

200

100

0

1

2

3

4

5

6

7

8

9

10

11

Month

0 D
1 2 3
4 5 6
7 8 9
10 12

Flow (cfs) Monthly Rainfall (in)

Figure C.23. 10-Year Validation (Monthly Medians) at 02221525 Murder Creek below Eatonton, GA.

Simulation Name:
Period for Flow Analysis Begin Date: End Date:
Total Simulated In-stream Flow:
Total of highest 10% flows: Total of lowest 50% flows:
Simulated Summer Flow Volume ( months 7-9): Simulated Fall Flow Volume (months 10-12): Simulated Winter Flow Volume (months 1-3): Simulated Spring Flow Volume (months 4-6):
Total Simulated Storm Volume: Simulated Summer Storm Volume (7-9):
Errors (Simulated-Observed) Error in total volume: Error in 50% lowest flows: Error in 10% highest flows: Seasonal volume error - Summer: Seasonal volume error - Fall: Seasonal volume error - Winter: Seasonal volume error - Spring: Error in storm volumes: Error in summer storm volumes:

02221525
01/01/90 12/31/99
183.13
77.13 29.68
25.17 34.40 85.48 38.09
154.89 18.04
25.67 34.59 15.43 40.47 24.73 20.17 29.06 18.52 30.66

Simulation Period: Watershed Area (ac):
Baseflow PERCENTILE: Usually 1%-5%
Total Observed In-stream Flow:
Total of Observed highest 10% flows: Total of Observed Lowest 50% flows:
Observed Summer Flow Volume (7-9): Observed Fall Flow Volume (10-12): Observed Winter Flow Volume (1-3): Observed Spring Flow Volume (4-6):
Total Observed Storm Volume: Observed Summer Storm Volume (7-9):
Recommended Criteria 10 10 15 30 30 30 30 20 50

121690
2.5
136.13
65.23 19.42
14.98 25.89 68.24 27.02
126.19 12.51
Last run

Figure C.24. 10-Year Validation Statistics at 02221525 Murder Creek below Eatonton, GA.

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-15 of C-18

Total Rainfall (in)

Flow (cfs)

TotalRainfal (in)

Observed Flow

Modeled Flow

12000

0

1

10000

2

8000

3

4

6000

5

6

4000

7

2000

8

9

0

10

1/1/90

1/1/91

1/1/92

1/1/93

1/1/94

1/1/95

1/1/96

1/1/97

1/1/98

1/1/99

1/1/00

Time

Figure C.25. 10-Year Validation (Daily Flow) at 02208450 Alcovy River above Covington, GA.

Monthly Rainfall (in)

Average Observed Flow (cfs) Flow (cfs)

10-Year Flow Comparison for 02208450 (1/1/1990 to 12/31/1999)

800 700 600 500 400 300 200 100
0 0

Avg Flow (1/1/1990 to 12/31/1999) One-to-one line Best-fit line
y = 0.9025x - 4.045 R2 = 0.9577
100 200 300 400 500 600 700 800
Average Modeled Flow (cfs)

Avg Monthly Rainfall (in)

Avg Observed Flow (1/1/1990 to 12/31/1999)

Avg Modeled Flow (Same Period)

800

0

J FMAM J J A SON D

700

1

2 600
3

500

4

400

5

300

6

7 200
8

100

9

0

10

1 2 3 4 5 6 7 8 9 10 11 12

Month

Figure C.26. 10-Year Validation (Monthly Average) at 02208450 Alcovy River above Covington, GA.

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-16 of C-18

10-Year Flow Comparison for 02208450 (1/1/1990 to 12/31/1999)

Average Monthly Rainfall (in)

Median Observed Flow (1/1/1990 to 12/31/1999)

800

J

F

M

A

M

J

700

Observed (25th, 75th) Modeled (Median, 25th, 75th)

J

A

S

O

N

600

500

400

300

200

100

0

1

2

3

4

5

6

7

8

9

10

11

Month

0 D
1 2 3
4 5 6
7 8 9
10 12

Flow (cfs) Monthly Rainfall (in)

Figure C.27. 10-Year Validation (Monthly Medians) at 02208450 Alcovy River above Covington, GA.

Simulation Name:
Period for Flow Analysis Begin Date: End Date:
Total Simulated In-stream Flow:
Total of highest 10% flows: Total of lowest 50% flows:
Simulated Summer Flow Volume ( months 7-9): Simulated Fall Flow Volume (months 10-12): Simulated Winter Flow Volume (months 1-3): Simulated Spring Flow Volume (months 4-6):
Total Simulated Storm Volume: Simulated Summer Storm Volume (7-9):
Errors (Simulated-Observed) Error in total volume: Error in 50% lowest flows: Error in 10% highest flows: Seasonal volume error - Summer: Seasonal volume error - Fall: Seasonal volume error - Winter: Seasonal volume error - Spring: Error in storm volumes: Error in summer storm volumes:

02208450
01/01/90 12/31/99
220.25
89.19 38.46
37.13 44.68 90.33 48.11
184.55 28.18
11.09 7.69 18.90 21.75 5.57 9.68 10.64 7.31 18.49

Simulation Period: Watershed Area (ac):
Baseflow PERCENTILE: Usually 1%-5%
Total Observed In-stream Flow:
Total of Observed highest 10% flows: Total of Observed Lowest 50% flows:
Observed Summer Flow Volume (7-9): Observed Fall Flow Volume (10-12): Observed Winter Flow Volume (1-3): Observed Spring Flow Volume (4-6):
Total Observed Storm Volume: Observed Summer Storm Volume (7-9):
Recommended Criteria 10 10 15 30 30 30 30 20 50

122720
2.5
195.82
72.34 35.50
29.05 42.19 81.59 42.99
171.05 22.97
Last run

Figure C.28. 10-Year Validation Statistics at 02208450 Alcovy River above Covington, GA.

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-17 of C-18

Total Rainfall (in)

Flow (cfs)

TotalRainfal (in)

Observed Flow

Modeled Flow

120000

0

1

100000

2

80000

3

4

60000

5

6

40000

7

20000

8

9

0

10

1/1/90

1/1/91

1/1/92

1/1/93

1/1/94

1/1/95

1/1/96

1/1/97

1/1/98

1/1/99

1/1/00

Time

Figure C.29. 10-Year Validation (Daily Flow) at 02213000 Ocmulgee River at Macon, GA.

Average Observed Flow (cfs) Flow (cfs)

10-Year Flow Comparison for 02213000 (1/1/1990 to 12/31/1999)

Avg Flow (1/1/1990 to 12/31/1999) One-to-one line Best-fit line
8000

7000

y = 1.0659x - 351.2 R2 = 0.9937

6000

5000

4000

3000

2000

1000

0 0 1000 2000 3000 4000 5000 6000 7000 8000

Average Modeled Flow (cfs)

Avg Monthly Rainfall (in)

Avg Observed Flow (1/1/1990 to 12/31/1999)

Avg Modeled Flow (Same Period)

8000

0

J FMAM J J ASOND

7000

1

2 6000
3

5000

4

4000

5

3000

6

7 2000
8

1000

9

0

10

1 2 3 4 5 6 7 8 9 10 11 12

Month

Figure C.30. 10-Year Validation (Monthly Average) at 02213000 Ocmulgee River at Macon, GA.

Monthly Rainfall (in)

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page C-18 of C-18

10-Year Flow Comparison for 02213000 (1/1/1990 to 12/31/1999)

Average Monthly Rainfall (in)

Median Observed Flow (1/1/1990 to 12/31/1999)

8000

J

F

M

A

M

J

7000

Observed (25th, 75th) Modeled (Median, 25th, 75th)

J

A

S

O

N

6000

5000

4000

3000

2000

1000

0

1

2

3

4

5

6

7

8

9

10

11

Month

0 D
1 2 3
4 5 6
7 8 9
10 12

Flow (cfs) Monthly Rainfall (in)

Figure C.31. 10-Year Validation (Monthly Medians) at 02213000 Ocmulgee River at Macon, GA.

Simulation Name:
Period for Flow Analysis Begin Date: End Date:
Total Simulated In-stream Flow:
Total of highest 10% flows: Total of lowest 50% flows:
Simulated Summer Flow Volume ( months 7-9): Simulated Fall Flow Volume (months 10-12): Simulated Winter Flow Volume (months 1-3): Simulated Spring Flow Volume (months 4-6):
Total Simulated Storm Volume: Simulated Summer Storm Volume (7-9):
Errors (Simulated-Observed) Error in total volume: Error in 50% lowest flows: Error in 10% highest flows: Seasonal volume error - Summer: Seasonal volume error - Fall: Seasonal volume error - Winter: Seasonal volume error - Spring: Error in storm volumes: Error in summer storm volumes:

02213000
01/01/90 12/31/99
193.01
69.82 38.75
33.16 39.39 80.11 40.35
154.66 23.59
4.33 19.67 -3.21 11.50 4.71 -1.20 9.03 -1.66 4.41

Simulation Period: Watershed Area (ac):
Baseflow PERCENTILE: Usually 1%-5%
Total Observed In-stream Flow:
Total of Observed highest 10% flows: Total of Observed Lowest 50% flows:
Observed Summer Flow Volume (7-9): Observed Fall Flow Volume (10-12): Observed Winter Flow Volume (1-3): Observed Spring Flow Volume (4-6):
Total Observed Storm Volume: Observed Summer Storm Volume (7-9):
Recommended Criteria 10 10 15 30 30 30 30 20 50

1450880
2.5
184.66
72.06 31.13
29.35 37.54 81.07 36.70
157.23 22.55
Last run

Figure C.32. 10-Year Validation Statistics at 02213000 Ocmulgee River at Macon, GA.

APPENDIX D: SIMULATION PERIOD HYDROGRAPHS

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page D-1 of D-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page D-2 of D-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page D-3 of D-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page D-4 of D-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page D-5 of D-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page D-6 of D-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page D-7 of D-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page D-8 of D-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page D-9 of D-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page D-10 of D-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page D-11 of D-11

APPENDIX E: WATER QUALITY CALIBRATIONS

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page E-1 of E-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page E-2 of E-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page E-3 of E-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page E-4 of E-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page E-5 of E-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page E-6 of E-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page E-7 of E-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page E-8 of E-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page E-9 of E-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page E-10 of E-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page E-11 of E-11

APPENDIX F: SIMULATED FECAL COLIFORM
30-DAY GEOMETRIC MEANS FOR EXISTING AND TMDL CONDITIONS

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page F-1 of F-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page F-2 of F-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page F-3 of F-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page F-4 of F-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page F-5 of F-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page F-6 of F-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page F-7 of F-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page F-8 of F-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page F-9 of F-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page F-10 of F-11

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page F-11 of F-11

APPENDIX G: PROJECT INFORMATION FOR WATERSHED MODELS

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page G-1 of G-14
UPPER OCMULGEE RIVER BASIN (03070103)

Georgia Middle 3 Basins TMDL Development
303(d) Listed Impaired Segments for Fecal Coliform Upper Ocmulgee Basin

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page G-2 of G-14

Not Supporting Designated Use

STREAM

1999 MONITORING
STATION

ALCOVY RIVER 02208182

ALMAND BRANCH 02204748

BIG COTTON INDIAN CREEK BIG FLAT CREEK

02204222 02208420

BIG SANDY CREEK 02211199

CABIN CREEK

02211380

CAMP CREEK

02206235

COBBS CREEK 02203873

CONLEY CREEK 02203899

DOOLITTLE CREEK 02203831

FALLING CREEK 02212600

HONEY CREEK 02204130

HOPKINS CREEK 02208085

INTRENCHMENT CREEK

02203700

JACKS CREEK

02207060

LITTLE HAYNES CREEK

02207430

LITTLE STONE MNTN CRK

02207135

LITTLE SUWANEE CREEK

02205130

MCCLAIN BRANCH 02204128

NO BUSINESS CREEK

02207185

SHETLEY CREEK 02206000

SHOAL CREEK 02208140

SHOAL CREEK 02203850

SNAPFINGER CREEK

02203961

SUBWATERSHED ID

PROJECT NAME

12 DIGIT HUC ID

UPOCM10

3349

030701030704

UPOCM05

304a

030701030304

UPOCM04

202a

030701030202

UPOCM11 UPOCM16 UPOCM15 UPOCM06 UPOCM02A UPOCM02A UPOCM02A UPOCM17
UPOCM03
UPOCM10 UPOCM01 UPOCM07

3337 3136 3121 3280 103-SHD20 103-CND20 102-DOO10, 102-DOO30 3082 106-HON20, 106b, 106c 3370 INT10, INT30 3256

030701030706 030701031005 030701031104 030701030403 030701030103 030701030103 030701030102, 030701030102 030701031305 030701030106, 030701030106, 030701030106 030701030701 030701030102, 030701030102 030701030406

UPOCM09

3217

030701030504

UPOCM08

3250

030701030407

UPOCM07 UPOCM03 UPOCM08 UPOCM06 UPOCM10 UPOCM02A
UPOCM02B

3310
106a
3238
3298 3361 103-SHD50, 103-SHD10 104-SFD20, 104-SFD50

030701030404
030701030106
030701030501
030701030401 030701030701 030701030103, 030701030103 030701030104, 030701030104

Georgia Middle 3 Basins TMDL Development
303(d) Listed Impaired Segments for Fecal Coliform Upper Ocmulgee Basin

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page G-3 of G-14

Not Supporting Designated Use

STREAM

1999 MONITORING
STATION

SNAPPING CREEK

SHOALS

02204776

SOUTH RIVER

02203800, 02203630

SOUTH RIVER

02203800, 02203630

SOUTH RIVER

02203800, 02203630

SOUTH RIVER

02203965

SOUTH RIVER

02204070, 02204149

SOUTH RIVER

02204070, 02204149

STONE CREEK

MOUNTAIN

02207130

SUGAR CREEK 02203820

SWEETWATER CREEK

02206100

SWIFT CREEK TOBESOFKEE CREEK TOWN BRANCH TURKEY CREEK

02207200
02213300 02211110 02206448

TUSSAHAW CREEK 02209750

WALNUT CREEK
WATSON CREEK WISE CREEK

02213055, 02213110 02206470 02210998

SUBWATERSHED ID

PROJECT NAME

12 DIGIT HUC ID

UPOCM05

304b, 304c

030701030304, 030701030304

UPOCM01

SOU310, SOU320, UTD80, SOU290, SOU300

030701030101, 030701030101, 030701030101, 030701030102, 030701030102

UPOCM02A UPOCM02B

102-260, 102-270, 102-280, 103-240, 103-250 103-CND20, 103-SOU210, 103-230

030701030102, 030701030102, 030701030102, 030701030103, 030701030103 030701030103, 030701030103, 030701030103

UPOCM02B

130-SOU210, 107-SOU130, 105-200, 105-SOU180

030701030103, 030701030105, 030701030105, 030701030105

UPOCM02B UPOCM03

105-SOU130, 107-SOU130 107a, 107b

030701030105, 030701030107 030701030107, 030701030107

UPOCM08

3247

030701030407

UPOCM02A
UPOCM06
UPOCM08 UPOCM18 UPOCM16 UPOCM07 UPOCM12
UPOCM19 UPOCM07 UPOCM14

102-SGD10 3271, 3277, 3289 3229 3046, 3049 3148 3268 3175, 3181 3058, 3064 3262 3163

030701030102 030701030403, 030701030403, 030701030402 030701030501 030701031402, 030701031401 030701031004 030701030406 030701030903, 030701030902 030701031604, 030701031603 030701030406 030701031003

Georgia Middle 3 Basins TMDL Development
303(d) Listed Impaired Segments for Fecal Coliform Upper Ocmulgee Basin

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page G-4 of G-14

Not Supporting Designated Use

STREAM
YELLOW RIVER
YELLOW RIVER YELLOW WATER CREEK

1999 MONITORING
STATION
02206500
02208005
02210780

SUBWATERSHED ID

PROJECT NAME

12 DIGIT HUC ID

UPOCM07 UPOCM09

3244, 3253, 3259, 3265 3196, 3199, 3202

030701030406, 030701030406, 030701030406, 030701030406 030701030603, 030701030601, 030701030601

UPOCM14

3166

030701031001

Georgia Middle 3 Basins TMDL Development
303(d) Listed Impaired Segments for Fecal Coliform Upper Ocmulgee Basin

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page G-5 of G-14

Partially Supporting Designated Use

STREAM

1999 MONITORING
STATION

BEAVER RUIN CREEK

NA

BIG HAYNES CREEK NA

SUBWATERSHED ID

PROJECT NAME

12 DIGIT HUC ID

UPOCM06

3292

030701030401

UPOCM09

3223

030701030503

BIG HAYNES CREEK 02207412

BIG HAYNES CREEK 02207420

BROMOLOW CREEK

02206030

CEDAR CREEK 02208180

DOLESS CREEK NA

JACKSON CREEK 02206300

LAKE JACKSON NA

NORTH BRANCH SOUTH RIVER

NA

OCMULGEE RIVER 02212950

OCMULGEE RIVER 02213700

PEW CREEK

02205522

ROCKY CREEK

02213660, 02213675

SOUTH RIVER

02204520

SOUTH RIVER TOBESOFKEE CREEK

02204810 02213560

YELLOW RIVER 02207300

UPOCM09 UPOCM09 UPOCM06 UPOCM10 UPOCM02A UPOCM06
UPOCM13
UPOCM01 UPOCM19 UPOCM19 UPOCM07 UPOCM18
UPOCM05 UPOCM05 UPOCM18
UPOCM08

3220 3211 3295, 3301 3355 102-DOO20 3274, 3283 3169, 3187, 3190, 3193 SOU350 MCD20 3055 3022 3304
3031
301a, 301b 305a
3028
3208, 3226, 3232, 3235

030701030505 030701030505 030701030401, 030701030401 030701030704 030701030102 030701030403, 030701030403 030701030903, 030701030903, 030701030305, 030701030804 030701030101, 030701030101 030701031602 030701031605 030701030405
030701031406
030701030301, 030701030301 030701030305
030701031406
030701030502, 030701030501, 030701030501, 030701030501

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page G-6 of G-14
Modeling Schematic of the Upper Ocmulgee River Basin (03070103)

UPOCM0 1

UPOCM2 A
UPOCM2 B
UPOCM0 3

UPOCM0 4

UPCOM1 2

UPOCM05

UPOCM0 6
UPOCM0 7
UPOCM0 8
UP0CM0 9

UPOCM1 5

UPOCM1 6

UPOCM1 3
USGS GAGE # 02210500
UPOCM1 4

UPOCM1 8

UPOCM1 7

UPOCM19

UPOCM2 0

UPOCM1 0
UPOCM1 1

Upper Ocmulgee River Basin Projects

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page G-7 of G-14

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page G-8 of G-14
Upper Ocmulgee River Basin
Delineated Subwatersheds for Modeling

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page G-9 of G-14
Upper Ocmulgee River Basin
Active Permitted Point Sources for Modeling

Upper Ocmulgee River Basin 1999 Water Quality Monitoring Stations

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page G-10 of G-14

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page G-11 of G-14
GA Middle 3 Basins TMDL Development HSPF Project Summary Sheet Project Name: UPOCM1

Listed Segments in Project

Subwatershed ID
SOU350 MCD20 INT10 INT30 POO10 SOU310 SOU320 UTD80 SOU290 SOU300

Listed Segment
North Br South River (FC) North Br South River (FC) Intrenchment Creek (FC) Intrenchment Creek (FC)
NA South River (FC) South River (FC) South River (FC) South River (FC) South River (FC)

Notes: DO = Dissolved Oxygen FC = Fecal Coliform

Point Sources in Project

Sub. ID
SOU350 MCD20
INT10 INT30
POO10 SOU310 SOU320
UTD80 SOU290 SOU300

NPDES ID and Name
McDaniel CSO
Intrenchment CSO
Custer CSO
GA0024040 ATLANTA (SOUTH RIVER WRC)

Receiving Stream North Br
South River Intrenchment
Creek
South River

Permitted Flow (cfs)
NA
NA NA
0.001

Projects Entered as Point Sources

Subwatershed ID

Project Name

WDM Stations Assigned in Project

Subwatershed ID SOU350 MCD20 INT10 INT30 POO10 SOU310 SOU320 UTD80 SOU290 SOU300

WDM Station Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield

Schematic of Project Subwatersheds (Modeling Framework)

MCD20

SOU350

UTD80

SOU320

POO10

SOU310

INT30

SOU300

INT10

SOU290

Batch Files to Run for Project Upocm1CSOs.bat

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page G-12 of G-14
GA Middle 3 Basins TMDL Development HSPF Project Summary Sheet Project Name: UPOCM2A

Listed Segments in Project

Point Sources in Project

Subwatershed ID
102-DOO20 102-SGD10 103-SHD20 103-SHD50
102-260 102-270 102-280 102-UTD70 103-240 103-250 103-SHD10 102-DOO10 102-DOO30

Listed Segment
Doless Creek (FC and DO) Sugar Creek (FC) Cobbs Creek (FC) Shoal Creek (FC) South River (FC) South River (FC) South River (FC) NA South River (FC) South River (FC) Shoal Creek (FC) Doolittle Creek (FC) Doolittle Creek (FC)

Sub. ID
102-DOO20 102-SGD10 103-SHD20 103-SHD50
102-260 102-270 102-280 102-UTD70 103-240 103-250 103-SHD10 102-DOO10 102-DOO30

NPDES ID and Name

Receiving Permitted Stream Flow (cfs)

Notes: DO = Dissolved Oxygen FC = Fecal Coliform

Projects Entered as Point Sources

Subwatershed ID
102-280

Project Name UPOCM1

WDM Stations Assigned in Project

Subwatershed ID 102-DOO20 102-SGD10 103-SHD20 103-SHD50 102-260 102-270 102-280 102-UTD70 103-240 103-250 103-SHD10 102-DOO10 102-DOO30

WDM Station Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield

Schematic of Project Subwatersheds (Modeling Framework)

1 0 2DOO10

1 0 2DOO20

1 0 2SGD10

1 0 2- 2 8 0

1 0 2-DOO30

1 0 2-2 7 0

1 0 2UTD70

1 0 2- 2 6 0

1 0 3- 2 5 0

1 0 3SHD20

1 0 3SHD50

1 0 3- SHD10

1 0 3- 2 4 0

Batch Files to Run for Project LinkUpocm1toUpocm2A.bat

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page G-13 of G-14
GA Middle 3 Basins TMDL Development HSPF Project Summary Sheet Project Name: UPOCM2B

Listed Segments in Project

Point Sources in Project

Subwatershed ID
103-CND20 103-SOU210 104-SFD20 104-SFD50 105-COR10 105-PBD10 105-PBD40 105-SOU130 107-SOU130
103-230 103-UTD50
105-200 105-SOU180

Listed Segment
Conley Creek (FC) South River (FC) Snapfinger Creek (FC) Snapfinger Creek (FC)
NA NA NA South River (FC) South River (FC) South River (FC) NA South River (FC) South River (FC)

Sub. ID 103-CND20 103-SOU210
104-SFD20 104-SFD50 105 COR10
105-PBD10 105-PBD40 105-SOU130

NPDES ID and Name
GA0024147 DeKalb Co Snapfinger
WPCP

Receiving Stream
Snapfinger Creek

Permitted Flow (cfs)
55.8

GA0049808 Henry Co
Panola Woods WPCP

Corn Creek

0.001

GA0026816 DeKalb Co Polebridge
WPCP

South River

31.0

Notes: DO = Dissolved Oxygen FC = Fecal Coliform

WDM Stations Assigned in Project

Projects Entered as Point Sources

Subwatershed ID 103-230

Project Name UPOCM2A

Schematic of Project Subwatersheds (Modeling Framework)

Subwatershed ID 103-CND20 103-SOU210 104-SFD20 104-SFD50 105-COR10 105-PBD10 105-PBD40 105-SOU130 107-SOU130 103-230 103-UTD50 105-200 105-SOU180

WDM Station Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield

103CND20
1 0 3 -2 3 0

103UTD50

104SFD50

1 0 3 -S O U 2 1 0

1 0 4 -S F D 2 0

105-200

105COR10

105-SOU180

105-SOU130

105PBD40
105-PBD10

107-SOU130

Batch Files to Run for Project LinkUpocm2AtoUpocm2B.bat

Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page G-14 of G-14
GA Middle 3 Basins TMDL Development HSPF Project Summary Sheet Project Name: UPOCM3

Listed Segments in Project

Point Sources in Project

Subwatershed ID
106-HON10 106-HON20
106a 106b 106c 107a 107b

Listed Segment
NA Honey Creek (FC) McClain Branch (FC) Honey Creek (FC) Honey Creek (FC) South River (FC) South River (FC)

Notes: DO = Dissolved Oxygen FC = Fecal Coliform

Sub. ID
106HON10
106HON20 106a
106b 106c 107a 107b

NPDES ID and Name
GA0022659 Rockdale Co
GA0026239 Rockdale Co

Receiving Permitted Stream Flow (cfs)

Honey Creek

0.465

South River 0.341

Projects Entered as Point Sources

Subwatershed ID
107a

Project Name UPOCM2B

WDM Stations Assigned in Project

Subwatershed ID 106-HON10 106-HON20 106a 106b 106c 107a 107b

WDM Station Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield Atl Hartsfield

Schematic of Project Subwatersheds (Modeling Framework)

106HON20

106HON10

106b

106a

107a

106c

107b

Batch Files to Run for Project LinkUpocm2BtoUpocm3.bat