Northeast Glacial Lakes Strategic Plan
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NORTHEAST GLACIAL LAKES STRATEGIC PLAN In Cooperation With: South Dakota Conservation Districts South Dakota Association of Conservation Districts South Dakota Department of Environment and Natural Resources USDA Natural Resources Conservation Service Date: December 2013 Prepared by: TABLE OF CONTENTS EXECUTIVE SUMMARY ............................................................................................... 6 1.0 INTRODUCTION ...................................................................................................... 8 1.1 Project Background and Scope ........................................................................ 8 1.2 NEGL Watershed History ............................................................................. 10 1.3 NEGL Water Quality Studies ........................................................................ 13 1.4 Goals of the NEGL Project Strategic Plan .................................................... 21 2.0 CAUSES AND SOURCES OF IMPAIRMENT .................................................. 22 2.1 Geography ....................................................................................................... 22 2.2 Soils ................................................................................................................. 23 2.3 Land Use .......................................................................................................... 25 2.4 Water Resources .............................................................................................. 26 2.5 Water Bodies Studies and Current Status ........................................................ 29 2.6 Description of Impairment for 303(d) Water Body Listings NEGL ............... 36 2.6.1 pH Levels .................................................................................................. 36 2.6.2 Dissolved Oxygen ..................................................................................... 38 2.6.3 Temperature ............................................................................................... 39 2.7 Defining the Sources of Impairments for 303(d) Water Bodies .................... 40 2.7.1 Point Sources of Impairment ...................................................................... 40 2.7.2 Nonpoint Sources of Impairment ............................................................... 41 2.7.2.1 High pH: Blue Dog Lake L4 and Nine Mile Lake L26 ..................... 41 L4 Blue Dog Lake ............................................................................ 41 L26 Nine Mile Lake .......................................................................... 43 2.7.2.2 Dissolved Oxygen: Buffalo Lake South L36 ................................... 45 2.7.2.3 Temperature: Pierpont Lake L28 ...................................................... 46 3.0 NONPOINT SOURCE MANAGEMENT MEASURES ................................... 47 3.1 Animal Waste Management System. NRCS Practice Code 313 .................... 48 3.2 Nutrient Management System. NRCS Practice Code 590 .............................. 49 3.3 Prescribed Grazing - NRCS Practice Code 528 .............................................. 50 3.3.1 Prescribed Grazing – Pasture Lands ................................................... 50 3.3.2 Prescribed Grazing - Riparian Areas .................................................. 50 3.4 Residue & Tillage Management on Cropland. NRCS Codes 329 ................. 51 3.5 Streambank Stabilization. NRCS Codes 580 ................................................. 52 3.6 Grassed Waterways. NRCS Practice Code 412 .............................................. 53 Northeast Glacial Lakes Strategic Plan December 2013 Page 2 3.7 Wetland Restoration, Pond Construction, Water & Sediment Control Basins, and Structures for Water Control. NRCS Practice Codes 657, 378, 638, 587 ....................................................... 53 3.8 Conversion of Cropland to Forage and Biomass Plantings NRCS Practice Code 512 ................................................................................ 54 3.9 Conservation Crop Rotation & Conservation Cover Crops. NRCS Practice Code 328 & 340 ..................................................................... 55 3.9.1 Conservation Crop Rotation (328) ....................................................... 55 3.9.2 Conservation Cover Crop (340) ........................................................... 56 3.10 Windbreak/Shelterbelt Establishment. NRCS Practice Code 380 ................. 57 3.11 Nutrient Management Plan - Cropland. NRCS Practice Code 590 ............... 57 3.12 Filter Strips – Non CRP. NRCS Practice Code 393 ....................................... 58 3.13 Brush Management - NRCS Practice Code 314 ............................................ 58 4.0 LOAD REDUCTIONS ............................................................................................. 59 4.1 Animal Waste Storage Facilities ...................................................................... 59 4.2 Nutrient Management System Load Reductions for Animal Wastes .............. 60 4.3 Prescribed Grazing Systems ............................................................................ 61 4.3.1 Upland Prescribed Grazing Systems ........................................................... 61 4.3.2 Riparian Area Grazing Management ...................................................... 61 4.4 Residue & Tillage Management on Cropland .................................................. 62 4.5 Stream Bank Stabilization ................................................................................ 63 4.6 Grassed Waterways........................................................................................... 64 4.7 Wetland Restoration, Pond, and Basin Construction ....................................... 65 4.8 Conversion of Cropland to Forage and Biomass Plantings .............................. 65 4.9 Conservation Crop Rotation & Cover Crop on Cropland Acres ..................... 66 4.10 Windbreak/Shelterbelt Establishment ............................................................ 67 4.11 Nutrient Management Plan - Cropland ........................................................... 68 4.12 Filter Strips - Non CRP .................................................................................... 69 4.13 Brush Management .......................................................................................... 70 5.0 TECHNICAL AND FINANCIAL ASSISTANCE NEEDED ............................... 71 6.0 PUBLIC OUTREACH ............................................................................................. 79 7.0 IMPLEMENTATION SCHEDULE ....................................................................... 80 8.0 SHORT-TERM CRITERIA AND MILESTONES FOR BMP IMPLEMENTATION PROGRESS ....................................................................... 82 Northeast Glacial Lakes Strategic Plan December 2013 Page 3 9.0 MONITORING AND EVALUATION PLAN ...................................................... 84 10.0 BIBLIOGRAPHY ................................................................................................. 85 List of Figures Figure 1-1. Hydrological Units in the NEGL Watershed ................................................... 9 Figure 1-2. Cities, Counties, Water Bodies of the NEGL Project Area ........................... 12 Figure 1-3. Segment 1 Boundaries of the NEGL Project 2007-2010 ............................. 13 Figure 2-1. Common Resource Areas of the NEGL Project Area ................................... 24 Figure 2-2. General Soils Map of the NEGL Project Area ............................................. 25 Figure 2-3. Cropland Productivity in the NEGL Project Area ......................................... 27 Figure 2-4. Rangeland Productivity in the NEGL Project Area ....................................... 28 Figure 2-5. 303(d) Listed Water Bodies in the Big Sioux River Basin, NEGL ............... 34 Figure 2-6. 303(d) Listed Water Bodies in the James River Basin, NEGL ..................... 35 Figure 2-7. 303(d) Listed Water Bodies in the Red River Basin, NEGL ......................... 36 Figure 3-1. Subregions Studied in the Missouri River Basin, CEAP, NRCS 2012 ......... 48 List of Tables Table 1-1. Population Statistics of the NEGL Project Area ............................................. 10 Table 1-2. Water Bodies in Segment 2 NEGL Project Area ............................................ 14 Table 2-1. Agricultural Data for NEGL Counties ............................................................ 27 Table 2-2. Rural Water Systems Serving the NEGL Watershed Counties ...................... 29 Table 2-3. NEGL Project Water Bodies: Beneficial Uses, Listed as 303(d) Impaired, Source of Impairment, and Priority ............................................... 31 Table 2-4. Summary of NEGL Project Water Bodies: Beneficial Uses, Listed as 303(d) Impaired ......................................................................................... 33 Table 2-5. Summary of Recommended Lake Restoration Techniques for Nine Mile Lake ......................................................................................... 44 Table 3-1. Estimated BMP Reduction Efficiencies by Pollutant Type ............................ 47 Table 4-1. Estimated N & P Load Reductions Per AWSF Systems ................................ 60 Table 4-2. Estimated N & P Load Reductions by NMP System ...................................... 60 Table 4-3-1. Estimated N, P, and Sediment Load Reductions