Lake of the Pines. Watershed TMDL. Depressed DO conditions in 3,700 acres of upper reservoir; declining

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1 Lake O O the Pines Watershed TMDL Presented at: 15 th National NPS Monitoring Workshop August 27, 2007 Vernon D. Rowe, P.E. Pilgrim s Pride Corporation Corporate Environmental Manager Lake of the Pines Corps of Engineers Flood Control Lake that has become Critical Water Supply Reservoir & Recreational Destination for East Texas Annual chicken production in Northeast Texas (District 5-N), from data of USD Depressed DO conditions in 3,700 acres of upper reservoir; declining The 2003 DO levels 305(b) in remainder List of reservoir Depressed dissolved oxygen conditions in 3,700 acres of upper reservoir Elevated levels of TN and TP throughout the reservoir Elevated levels of TN and TP throughout the reservoir 1

2 Low Levels of Dissolved Oxygen Possible Causes Oxygen demanding material (organic matter, ammonia) from the watershed is consumed in the reservoir Oxygen demanding material is produced and consumed within the reservoir this requires an external supply of phosphorus and other nutrients TMDL To minimize the probability of exceeding the screening criterion for chlorophyll a,, the average TP concentration in the upper reservoir must be reduced to less than mg/l, a 44% reduction This implies a similar reduction in the average TP concentration for the entire reservoir (from to 0.053) TMDL Load desired = TP*Z(ρ ρ + σ) Load desired = 47.5*4.34( ) = 865 mgtp/m 2 *year or 59,200 kg/year To achieve a 50% reduction in average TP concentration in the reservoir, a reduction in loading of 75,300 kg/year is required (134,500-75,300=59,200): a 56% reduction in load TMDL Implementation Point Source Industrial Municipal Nonpoint Source Agricultural Urban Mining Agricultural Best Management Upgrade of Industrial and Municipal Wastewater Systems to Provide Additional Nitrogen and Phosphorus Removal Practice Implementation 2

3 Components of BMP Program Litter Data Base Program Number of farms, houses, and birds by watershed and total Status of NMP development by watershed and total Breakdown of mortality management options Quantity of litter generated by watershed and total Quantity of litter land applied by watershed and total Quantity of litter used for other purposes by watershed and total Land area litter applied to by watershed and total Litter application rate in tons per acre by watershed and total Components of BMP Program Phosphorus Management Reduction of Phosphorus content of litter Nutrient Management Plan Development Contract Grower Assistance Monitoring Last Resort Actions Endpoint of the TMDL Project Reduce the frequency of DO Standards Violations in the upper reservoir to less than 10% and Stop the continuing decline in summer DO levels throughout the reservoir to help maintain recreation and public water supply uses. Northeast Texas Municipal Water District perspective presented by Walt Sears, Jr. Assessment and Mitigation of Agricultural and Other Nonpoint Source Activities in the Cypress Creek Basin 319h Project advances water quality OSSF Program in Marion, Morris, and Cass County reduces nutrients in waterways Stakeholders are the key to success Cypress Creek Basin Land Use Areas and Proportions Land use Size in Acres Percent of Total Development and implementation of Best Management Practices for agricultural activities including poultry, timber, cattle, and growing crops Urban Agricultural 99.3% Cropland and pasture 0.4 % Concentrated feeding operations 0.02% Orchards, groves and vineyards 0.3% Other Agricultural land Rangeland Forest Water Wetlands Rock Unknown Total Area

4 319h Water Sample Collections NT-1 (7 Samples NT-2 (9 Samples NT-3 (4 Samples Need 1 NT-4 (11 Samples NT-6 (4 Samples Need 2 NT-5 & 9 No Samples NT-7 (2 Samples Need 3 NT-8 (4 Samples Need 3 NT-10 (1 Sample Need 4 NT-11 (6 Samples Need 4 NT-12 (5 Samples Need 2 Septic Waste within view of Lake O the Pines Improvements in methods of disposal of waste through individual septic systems (OSSF) 319(h) Project Septic Reductions 41 Systems Replaced to Date Cost $187, The Potential to discharge 9,697 Gallons of raw sewage Per Day 80,776 Lbs. Per Day 29,483,240 Lbs per Year OSSF Program by County District has 6 D.R. s on Staff Through Dec., 2006 Marion Co., Per., 222 Compl Morris Co., Per., 54 Compl. Cass Co., Per., 30 Compl. 4

5 Stakeholders drive the process Clean Rivers Program is the Genesis NORTHEAST TEXAS MUNICIPAL WATER DISTRICT Telephone: Fax: Mailing: PO Box 955 Hughes Springs, TX ACTIVE STAKEHOLDER PARTICIPATION IS ESSENTIAL 5