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Anne Arundel County

Anne Arundel County. MACo Winter Conference January 7, 2011. Chesapeake Bay TMDL Pollutants of Concern. Nitrogen Phosphorus Sediment. TMDL Allocation and Gap Determination. Existing Conditions Without BMP’s. Credit for existing. BMPs + Retrofits. Current Conditions. 2009 Progress. Gap.

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Anne Arundel County

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  1. Anne Arundel County MACo Winter Conference January 7, 2011

  2. Chesapeake Bay TMDLPollutants of Concern Nitrogen Phosphorus Sediment

  3. TMDL Allocation and Gap Determination Existing Conditions Without BMP’s Credit for existing BMPs + Retrofits Current Conditions 2009 Progress Gap Required Reduction Reducible Load Pollutant Load Bay TMDL Allocation E3 (Limit of Technology) 2009 2025

  4. Anne Arundel County Chesapeake Bay TMDL Allocation Total Nitrogen = 2.460 million lbs/yr Total Phosphorus = 0.151 million lbs/yr Sediment = TBD

  5. Pollutant Source Sectors Wastewater Treatment Plants (WWTPs) Septic Systems Stormwater Runoff Agriculture

  6. Pollutant Source Sector Actors Actors Where County Assumes Responsibility County WWTPs Privately Owned Septic Systems County Stormwater Runoff Actors Where County Does Not Assume Responsibility Minor Municipal WWTPs Minor Industrial WWTPs Major Industrial WWTPs Fort Meade WWTP Federal Lands – Stormwater Runoff State Lands – Stormwater Runoff City of Annapolis – Stormwater Runoff Agricultural Lands – Stormwater Runoff

  7. Anne Arundel County Core Implementation Strategy (1) WWTPs Upgrading WWTPs to Enhanced Nitrogen Removal Capacity (2) Septic Systems Sanitary Sewer Extensions and Satellite Cluster Systems (3) Stormwater Retrofits Stormwater Outfall Restoration Stormwater Pond Restoration (4) Headwater Stream Erosion Prevention Stream Channel Restoration Ephemeral Channel Restoration

  8. Point Source WWTP Participants County Government WWTPs (≈ $270,000,000) Federal Government WWTPs Private Sector WWTPs

  9. Septic System Participants County Sanitary Sewer Extensions and Satellite Cluster Systems (≈ $800,000,000) Private Sector Septic Systems

  10. Stormwater Retrofit Participants County Government (≈ $400,000,000) State Government Federal Government City Government Agriculture Privately Owned Land

  11. Headwater Stream Erosion Prevention Participants County Government (≈ $400,000,000) State Government Federal Government City Government Agriculture Private Sector

  12. Degraded Stream Conditions 12

  13. Ultimate Goals • Restored Stream Stability • Restored Hydrology within Floodplains and Streams • Restored Biological Health of Streams • Compliance with Water Quality Standards

  14. Step Pool Stormwater Conveyance (SPSC) Restoration Strategy 14

  15. What is the Potential Cost to Anne Arundel County? County WWTPs (≈ $270,000,000) Sanitary Sewer Extensions and Satellite Cluster Systems (≈ $800,000,000) Stormwater Retrofits (≈ $400,000,000) Headwater Stream Erosion Prevention (≈ $400,000,000) TOTAL ESTIMATED COST: $1.87 Billion

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