Neosho River Basin Bacteria Tmdls Table of Contents
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FINAL BACTERIA TOTAL MAXIMUM DAILY LOADS FOR THE NEOSHO RIVER BASIN, OKLAHOMA (OK121600) Prepared for: OKLAHOMA DEPARTMENT OF ENVIRONMENTAL QUALITY Prepared by: PARSONS JUNE 2008 FINAL BACTERIA TOTAL MAXIMUM DAILY LOADS FOR THE NEOSHO RIVER BASIN, OKLAHOMA (OK121600) OKWBID OK121600010060, OK121600010100, OK121600010440, OK121600030090, OK121600030160, OK121600030180, OK121600030190, OK121600030340, OK121600030440, OK121600030445, OK12600030510, OK121600040060, OK121600040130, OK121600040170, OK121600040200 Prepared for: OKLAHOMA DEPARTMENT OF ENVIRONMENTAL QUALITY Prepared by: PARSONS 8000 Centre Park Drive, Suite 200 Austin, TX 78754 JUNE 2008 Oklahoma Department of Environmental Quality: FY07 106 Grant (CA# I-006400-05) Project 24 – Bacteria TMDL Development Neosho River Basin Bacteria TMDLs Table of Contents TABLE OF CONTENTS EXECUTIVE SUMMARY ................................................................................................... viii SECTION 1 INTRODUCTION .............................................................................................1-1 1.1 TMDL Program Background .....................................................................................1-1 1.2 Watershed Description ...............................................................................................1-3 SECTION 2 PROBLEM IDENTIFICATION AND WATER QUALITY TARGET ......2-1 2.1 Oklahoma Water Quality Standards...........................................................................2-1 2.2 Problem Identification................................................................................................2-4 2.3 Water Quality Target..................................................................................................2-5 SECTION 3 POLLUTANT SOURCE ASSESSMENT .......................................................3-1 3.1 NPDES-Permitted Facilities.......................................................................................3-1 3.1.1 Continuous Point Source Discharges .............................................................3-2 3.1.2 NPDES No-Discharge Facilities and SSOs....................................................3-8 3.1.3 NPDES Municipal Separate Storm Sewer Discharge (MS4).........................3-9 3.1.4 Concentrated Animal Feeding Operations ...................................................3-11 3.2 Nonpoint Sources .....................................................................................................3-11 3.2.1 Wildlife.........................................................................................................3-11 3.2.2 Non-Permitted Agricultural Activities and Domesticated Animals.............3-13 3.2.3 Failing Onsite Wastewater Disposal Systems and Illicit Discharges...........3-17 3.2.4 Domestic Pets ...............................................................................................3-19 3.3 Summary of Bacteria Sources ..................................................................................3-20 SECTION 4 TECHNICAL APPROACH AND METHODS ..............................................4-1 4.1 Using Load Duration Curves to Develop TMDLs .....................................................4-1 4.2 Development of Flow Duration Curves .....................................................................4-2 4.3 Estimating Current Point and Nonpoint Loading.....................................................4-13 4.4 Development of TMDLs Using Load Duration Curves ...........................................4-14 SECTION 5 TMDL CALCULATIONS................................................................................ 5-1 5.1 Estimated Loading and Critical Conditions ...............................................................5-1 5.2 Wasteload Allocation ...............................................................................................5-13 5.3 Load Allocation........................................................................................................5-15 5.4 Seasonal Variability..................................................................................................5-15 5.5 Margin of Safety.......................................................................................................5-15 5.6 TMDL Calculations..................................................................................................5-16 5.7 LDCs and TMDL Calculations for Additional Bacterial Indicators ........................5-32 5.8 Reasonable Assurances ............................................................................................5-40 SECTION 6 PUBLIC PARTICIPATION............................................................................. 6-1 J:\planning\TMDL\Parsons\2007\5 Neosho river(22)\Neosho_FINAL_06-03-08.doc i FINAL June 2008 Neosho River Basin Bacteria TMDLs Table of Contents SECTION 7 REFERENCES ..................................................................................................7-1 APPENDICES Appendix A Ambient Water Quality Bacteria Data – 1997 to 2006 Appendix B NPDES Permit Discharge Monitoring Report Data and Sanitary Sewer Overflow Data Appendix C Estimated Flow Exceedance Percentiles Appendix D State of Oklahoma Antidegradation Policy Appendix E Storm Water Permitting Requirements and Presumptive Best management Practices (BMP) Approach Appendix F Response to Comments LIST OF FIGURES Figure 1-1a Watersheds Not Supporting Primary Body Contact Recreation Use within the Study Area......................................................................................................1-9 Figure 1-1b Watersheds Not Supporting Primary Body Contact Recreation Use within the Study Area....................................................................................................1-10 Figure 1-2a Land Use Map byWatershed ..............................................................................1-11 Figure 1-2b Land Use Map byWatershed ..............................................................................1-12 Figure 3-1a Locations of NPDES-Permitted Facilities and Poultry Operations in the Study Area ......................................................................................................................3-6 Figure 3-1b Locations of NPDES-Permitted Facilities and Oklahoma Poultry Operations in the Study Area..................................................................................................3-7 Figure 4-1 Flow Duration Curve for Ranger Creek (OK121600010060_00)........................4-5 Figure 4-2 Flow Duration Curve for Fourteenmile Creek (OK121600010100_00)..............4-5 Figure 4-3 Flow Duration Curve for Crutchfield Branch (OK121600010440_00)...............4-6 Figure 4-4 Flow Duration Curve for Drowning Creek (OK121600030090_00)...................4-7 Figure 4-5 Flow Duration Curve for Horse Creek (OK121600030160_00)..........................4-7 Figure 4-6 Flow Duration Curve for Fly Creek (OK121600030180_00)..............................4-8 Figure 4-7 Flow Duration Curve for Little Horse Creek (OK121600030190_00)................4-8 Figure 4-8 Flow Duration Curve for Cave Springs Branch (OK121600030340_00)............4-9 Figure 4-9 Flow Duration Curve for Elk River (OK121600030440_00) ..............................4-9 Figure 4-10 Flow Duration Curve for Honey Creek (OK121600030445_00).......................4-10 Figure 4-11 Flow Duration Curve for Sycamore Creek (OK121600030510_00) .................4-10 Figure 4-12 Flow Duration Curve for Tar Creek (OK121600040060_00)............................4-11 Figure 4-13 Flow Duration Curve for Cow Creek (OK121600040130_00)..........................4-11 Figure 4-14 Flow Duration Curve for Fourmile Creek (OK121600040170_00)...................4-12 Figure 4-15 Flow Duration Curve for Russell Creek (OK121600040200_00) .....................4-12 J:\planning\TMDL\Parsons\2007\5 Neosho river(22)\Neosho_FINAL_06-03-08.doc ii FINAL June 2008 Neosho River Basin Bacteria TMDLs Table of Contents Figure 5-1 Load Duration Curve for Enterococci in Ranger Creek (OK121600010060_00)........................................................................................5-6 Figure 5-2 Load Duration Curve for Enterococci in Fourteenmile Creek (OK121600010100_00)........................................................................................5-6 Figure 5-3 Load Duration Curve for Enterococci in Crutchfield Branch (OK121600010440_00)........................................................................................5-7 Figure 5-4 Load Duration Curve for Enterococci in Drowning Creek (OK121600030090_00)........................................................................................5-7 Figure 5-5 Load Duration Curve for Fecal Coliform in Horse Creek (OK121600030160_00)........................................................................................5-8 Figure 5-6 Load Duration Curve for Fecal Coliform in Fly Creek (OK121600030180_00)........................................................................................5-8 Figure 5-7 Load Duration Curve for Enterococci in Little Horse Creek (OK121600030190_00)........................................................................................5-9 Figure 5-8 Load Duration Curve for E. Coli in Cave Springs Branch (OK121600030340_00)........................................................................................5-9 Figure 5-9 Load Duration Curve for Enterococci in Elk River (OK121600030440_00) ....5-10 Figure 5-10 Load Duration Curve for Enterococci