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 Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page 3 of 14 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. Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page 4 of 14 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. Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page 5 of 14 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). Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page 6 of 14 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. Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page 7 of 14 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. Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page 8 of 14 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. Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page 9 of 14 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. Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page 10 of 14 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]). Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page 11 of 14 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. Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page 12 of 14 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. Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page 13 of 14 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. Proposed Fecal Coliform TMDLs Ocmulgee River Basin (06/30/01 Draft) Page 14 of 14 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