St. Johns County LSJR TAC Meeting

Transcription

1 St. Johns County LSJR TAC Meeting 1

2 Topics TMDLs in St. Johns County Program Status Update Projects Summary Discussion 2

3 TMDLs in St. Johns County Lower St. Johns River Basin BMAP TMDL reduction requirement over 20,000 Lbs./Year October 2017 Deadline Annual BMAP reporting Enforcement through FDEP NPDES MS4 permit Potential future TMDLs/BMAPs

4 Water Quality Program Implementation Minimize County s costs Cost-effective Grant eligible Shovel ready Establish partnerships agency and stakeholder Funding source Historically funded via TTF/grants No dedicated funding sources Stormwater Retrofit Credit Trading Septic Tank Removal Baffle Box Regional Stormwater Stormwater Harvest WWTP Upgrades

5 Water Quality Program Projects Regional Stormwater Treatment Masters Tract Deep Creek West Stormwater Harvesting Agricultural Partnerships Non-Structural Baffle Box Stormwater Harvest Regional Stormwater Treatment Agricultural Partnerships

6 Masters Tract Design Overview Wetland Cell 4 10 acres herbaceous wetlands 5 Credits Intake Pump Station 1 cfs baseflow and 2-9 cfs stormflow submersible pumps Wetlands 50 acres forested wetland creation 15 credits 1,300 1,700 #/yr TN Wet Pond 30 acres 40 day res. time 2,400 3,500 #/yr TN Canal 5 1,200 acre watershed 5,600 8,200 # /yr TN captured, 1-4 mg/l TN, cfs

7 Masters Tract Funding Construction Cost - $3.6 million $1.9 million Phase 1 $1.7 million Phase 2 Funding Sources - $3.6 million $2.6 million St. Johns River legislative appropriation $800 k FDEP/EPA 319 Grant $200k County Tree Funds

8 Masters Tract Summary 5,000 6,000 #/yr of TN removal Retires ~1 MGD UFA Generates 20 FGU/UMAM credits offsetting ~$2.5 million in mitigation costs for CIPs > 90% funding (construction) from SJRWMD & FDEP grants and other sources

9 Deep Creek West Background 15-acre pond 38-acre wetland 1200 acre watershed Owned by SJRWMD O & M by County O&M Credits ~700 # TN/yr Operational Challenges Forebay Pumps Wetlands

10 Deep Creek West Improvements MOA w/ SJRWMD Designed by County Grant funded by SJRWMD ($500k) Constructed by County ($1.1 million) Increase load reductions by > 50% More efficient pump operations More pond volume Increase wetland performance

11 Stormwater Harvesting SR16 3+ MGD Advanced WWTP (newly constructed) 100% Reuse w/ wet weather outfall Mill Creek TMDLs (DO, Nutrients and Fecal) Growth Reclaimed needs likely to outpace supply Reuse Augmentation via stormwater harvesting

12 Stormwater Harvesting Preliminary yield analysis ( MGD) Preliminary load reductions of # TN/yr Capital costs for supplementing reclaimed system low

13 Agricultural Partnership Nutrient Reduction Concepts Crop Structural BMPs Long-term contracts for structural BMPs (overhead irrigation, drip tape, tile drainage, etc.) Crop Alternatives Short-term contracts for less intensive management (perennial peanut) Crop Alteration Long-term contracts for less intensive management (silviculture)

14 Crop Alteration Program Benefits Improved water quality Source control Reduced runoff Reduced nutrient loading Water conservation Row crop 500,000+ gal/ac/yr Silviculture - <25,000 gal/ac/yr Other environmental benefits Habitat creation Green space creation

15 Crop Alternatives Concepts Crop Alteration Program County to solicit willing Sources of Pollution landowners Point through Non-Point procurement process Identify Pollutants 20-yr contract between Total Maximum Daily Load (TMDL) establishes County and maximum landowners amount for of pollutant maintenance that water costs body (~ $25/lb can assimilate TN/yr) Basin FDEP Management allocates nutrient Action Plan (BMAP) - FDEP Management strategy to achieve TMDL reduction credits to County SJRWMD grant funds to cover: FDEP establishes the Equitable allocation Initial planting of pollution costs loads to stakeholders Monitoring that of nutrient including loads point and nonpoint sources

16 Crop Alteration Program Moving Forward Finalize credit determination approach Work with FDEP, SJRWMD, and stakeholders to move project forward Identify partner funding opportunities County to develop contract template

17 Program Implementation Project Summary St. Johns County LSJR BMAP Potentially Complete Existing projects performing better than predicted with additional credits allocated Need to be prepared for future needs Continue monitoring and partnership building Expand portfolio of tools available to the County Load Reductions Deficit

18 Discussion