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Hunting Creek at Fairchild MVCCA-Meeting March 7, 2018

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A community meeting was held to discuss the stream restoration project.

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Hunting Creek at Fairchild MVCCA-Meeting March 7, 2018

  1. 1. A Fairfax County, VA, publication Department of Public Works and Environmental Services Working for You! Hunting Creek @ Fairchild Stream Restoration Project March 7, 2017
  2. 2. Stormwater Planning Division Agenda Program Drivers Social Goals Watershed Project Goals Restoration Plan Existing Conditions Example Stream Projects Next steps 2
  3. 3. Stormwater Planning Division Stormwater Program Drivers • Municipal Separate Storm Sewer System Permit (MS-4) • Chesapeake Bay Total Maximum Daily Loads (TMDL) – Regulates amount of pollutants in waterways (Nitrogen, Phosphorus, and Total Suspended Solids ) • Local TMDLs (sediment, bacteria, and PCBs) • Maintenance of existing facilities and infrastructure • Dam monitoring and maintenance • Public safety /emergency response – Flooding – Snow Removal 3
  4. 4. Stormwater Planning Division Project/Social Goals 1. Maintain open dialog and share information. 2. Coordinate with all stakeholders and the community. 3. Build partnerships with property owners and local organizations, such as Homeowner and Community/Civic Associations. 4. Design Team:  Stormwater Planning Division  Spring Bank Community Association  Wetland Studies and Solutions  Urban Forest Management Division  Park Authority  Wastewater Collection Division  Utilities Design and Construction Division  Fairfax County Public Schools  Virginia Department of Transportation 4
  5. 5. Belle Haven, Dogue & 4 Mile Watershed Management Plan • Watershed Characterization – Water Quality Monitoring – Land Use Change – Pollutant Loading – Physical Assessment • Structural Projects – 25 year plan • Non-Structural Practices – Policy and Regulations 5Stormwater Planning Division
  6. 6. Watershed Management Plans Improve watershed conditions and reduce downstream impacts through…. Controlling quantity Mitigate flooding where possible Controlling velocity Reduce erosion Floodplain connectivity Protect infrastructure 6Stormwater Planning Division
  7. 7. Belle Haven Watershed Management Plan • Belle Haven has a drainage area just over 2.7 mi2 • 21 priority projects identified in the watershed management plan 7Stormwater Planning Division
  8. 8. Stormwater Planning Division Belle Haven Watershed Management Plan 8
  9. 9. Stormwater Planning Division Stream Restoration Project 9
  10. 10. Stormwater Planning Division Stream Restoration Project Goals Restore approximately 1,200 feet of stormwater outfalls - headwater streams to improve Water Quality Reduce sediment and nutrient inputs into stream system Stabilize streambed and banks Provide bankfull bench/floodplain connectivity Improve habitat Protect Infrastructure (stormwater, sanitary, water, etc.) 10
  11. 11. Stormwater Planning Division Channel Evolution 11 Stage I
  12. 12. Stormwater Planning Division 12
  13. 13. Project Area 13Stormwater Planning Division
  14. 14. Stormwater Planning Division Existing Conditions – Reach 1 14
  15. 15. Stormwater Planning Division Existing Conditions – Reach 2 15
  16. 16. Stormwater Planning Division Existing Conditions – Reach 3 16
  17. 17. Stormwater Planning Division Reach 1 & 2 – Plan View 17
  18. 18. Stormwater Planning Division Reach 1 & 2 – Longitudinal Profile 18
  19. 19. Stormwater Planning Division Reach 3 – Plan View 19
  20. 20. Stormwater Planning Division Reach # - Longitudinal Profile 20
  21. 21. Stormwater Planning Division Typical Structures Used – Step Pools 21
  22. 22. Stormwater Planning Division Typical Structures – Step Pools 22
  23. 23. Stormwater Planning Division Typical Structures – Step Pool and Riffle 23
  24. 24. Stormwater Planning Division Typical Structure – Cascade 24
  25. 25. Stormwater Planning Division Construction Example 25
  26. 26. Stormwater Planning Division Construction Example 26
  27. 27. Stormwater Planning Division Construction Example 27
  28. 28. Stormwater Planning Division Construction Example 28
  29. 29. Stormwater Planning Division Construction Example 29
  30. 30. Stormwater Planning Division Construction Example 30
  31. 31. Stormwater Planning Division Growing Season Following Construction Completion 31
  32. 32. Stormwater Planning Division One Year After Construction Completion 32
  33. 33. Stormwater Planning Division Three Years After Construction Completion 33
  34. 34. Before and After Examples 34 Banks Park Before After Stormwater Planning Division
  35. 35. 35 Before and After Examples Big Rocky Run II Before After Stormwater Planning Division
  36. 36. 36 Before and After Examples Rabbit Branch Before After Stormwater Planning Division
  37. 37. Stormwater Planning Division Landscaping • Urban forester coordination • Total 210 trees surveyed • 38 trees more than 12” DBH are to be removed – Some to be used onsite as habitat features • Each tree evaluated for existing condition health, habitat value, design consideration and post- construction health • Native seed mix • Native trees and shrubs will be planted 37
  38. 38. Stormwater Planning Division What’s Next? • Iterative design process – 25, 65 percent, 95 percent and 100 percent design plan submittals with internal reviews and site walks for field validation of design and tree removal • Coordination with community, county divisions and utility companies • Permits from U.S. Army Corps of Engineers, Department of Environmental Quality, and VDOT • Estimated final plan approval date: June, 2018 38
  39. 39. Stormwater Planning Division Construction Timeline • The bidding process for construction can take approximately 3 months after final authorization of the final plan set • Funding allocation for construction are determined by project readiness and priorities for Fiscal Year 2020, and also Board of Supervisors approved budget. Potential for fall/winter 2018 • Construction duration: approx. 10 - 12 months • Post-Construction Transfer of Fairchild and Quander Property from BOS to FCPA 39
  40. 40. Stormwater Planning Division 40
  41. 41. Online Resources 41 Stormwater Planning Division http://www.fairfaxcounty.gov/publicworks/stormwater/ Fairfax County Watershed Management Planning http://www.fairfaxcounty.gov/nvswcd/newsletter/planning.htm Belle Haven Watershed Management Plan https://www.fairfaxcounty.gov/publicworks/sites/publicworks/files/assets/documents/pd f/watersheds/belle-haven-dogue-creek-four-mile-run-watersheds-chapter-5a.pdf EPA Water Quality Laws & Regulations http://www.epa.gov/water/laws.html Stormwater Planning Division
  42. 42. Stormwater Planning Division Contact Information Justin Pistore – Project Manager 703-324-5685 TTY 711 Justin.pistore@fairfaxcounty.gov Fairfax County Stormwater Planning Division 703-324-5500 TTY 711 12000 Government Center Parkway Fairfax, Virginia 22035 www.fairfaxcounty.gov/dpwes/stormwater To request this information in an alternate format call 703-324-5500, TTY 711 42

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