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Nottoway Park Stormwater and Water Quality Improvements Phases 1, 2, & 3

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Nottoway Park Stormwater and Water Quality Improvements Phases 1, 2, & 3

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Nottoway Park Stormwater and Water Quality Improvements Phases 1, 2, & 3

  1. 1. A Fairfax County, VA, publication Department of Public Works and Environmental Services Working for You! Nottoway Park Stormwater & Water Quality Improvements, Phases 1, 2, & 3 June 20, 2016
  2. 2. Nottoway Park BMP Retrofits Project DPWES Stormwater Planning Division Meeting Outline 2 • Fairfax County Stormwater Management Program Drivers • Accotink Creek Watershed Management Plan and Project Examples • Nottoway Park BMP Retrofits – Project Scope • Design Approach • Next Steps • Q&A
  3. 3. Nottoway Park BMP Retrofits Project DPWES Stormwater Planning Division Program Drivers and Project Types 3 • Chesapeake Bay Total Maximum Daily Load (TMDL) • Other (local streams) TMDLs • MS4 permit • Major project types  Stream and outfall restorations  Stormwater Pond retrofits  Site retrofits using Green Infrastructure • List of projects is developed from watershed plans, and referral from a variety of sources including the maintenance division and citizen complaints
  4. 4. Nottoway Park BMP Retrofits Project DPWES Stormwater Planning Division Countywide Watershed Planning 4 “Healthy Watersheds, Healthy Communities” • 30 Designated Watersheds • All 15 watershed plans have been adopted by Fairfax County
  5. 5. Nottoway Park BMP Retrofits Project DPWES Stormwater Planning Division Accotink Creek Watershed Management Plan 5 Nottoway Park: AC9555 http://www.fairfaxcounty.gov/dpwes/watersheds/accotinkcreek.htm
  6. 6. Nottoway Park BMP Retrofits Project DPWES Stormwater Planning Division Accotink Creek Watershed Management Plan Wakefield Run Stream Restoration 6
  7. 7. Nottoway Park BMP Retrofits Project DPWES Stormwater Planning Division Accotink Creek Watershed Management Plan Brookfield Pond Repair and Retrofit 7
  8. 8. Nottoway Park BMP Retrofits Project DPWES Stormwater Planning Division Accotink Creek Watershed Management Plan Brookfield Pond Repair and Retrofit 8
  9. 9. Nottoway Park BMP Retrofits Project DPWES Stormwater Planning Division Accotink Creek Watershed Management Plan Mantua Elementary School Stormwater Retrofit (proposed) 9
  10. 10. Nottoway Park BMP Retrofits Project DPWES Stormwater Planning Division Accotink Creek Watershed Management Plan Crook Branch Stream Restoration Project (proposed) 10 Reach 2
  11. 11. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division Stantec 11 Specializing in Water Resources Engineering & Stream Restoration Williamsburg Environmental Group (WEG) joined Stantec in 2014 Stantec at a glance: • Founded in 1954 • Over 15,000 employees in more than 200 locations • Diverse range of services and sectors, practice areas include: • Architecture, Buildings Engineering, Community Development, Environmental Services, Geotechnical Engineering, Mining Engineering, Oil & Gas Engineering, Power Engineering, Project Management, Transportation Infrastructure Engineering, Water and Wastewater Engineering • Stormwater BMP Retrofit, Stream Restoration and Water Quality Improvements: • James City County Green Infrastructure Plan, Stafford County stormwater BMP design, Town of Ashland stream restoration, Fairfax County stream restoration and stormwater BMP design, VDMA stormwater BMP inspections and design, Ft. Belvoir stormwater BMP inspections and Corrective Action Plans; VDOT stream restoration and stormwater concepts • Stantec Project & Design Team: J. Alex Forasté, P.E.; George Rhodes; Doug Beisch, P.E.; Ryan Haynes; Daniel Malone, L.A.; Karen Hall, P.E., CFM; Loretta Cummings, Ph.D.; Jason Mann.
  12. 12. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division Project Development 1. Walking the Park 2. Assessments & Evaluation 3. Stormwater Retrofits (Phase 1) 4. Stormwater Retrofits (Phase 2 & 3) 12
  13. 13. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 1. Walking the Park • Approx. 90 Acres • Baseball/Softball Fields • Tennis Courts • Volleyball • Basketball Courts • Walking Trails • Garden Plots 13
  14. 14. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 1. Walking the Park • Observe Drainage Patterns • Identify Existing drainage/ erosion related issues/ problems • Identify potential areas for stormwater & water quality improvements • Watershed Characterization 14
  15. 15. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 1. Walking the Park • Identify tree, vegetation, and natural resource inventory and condition. • Identify areas of high use and high pedestrian traffic areas (e.g. foot paths) • Identify constraints 15
  16. 16. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 1. Walking the Park • Existing Issues 16
  17. 17. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 1. Walking the Park • Existing Issues 17
  18. 18. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 1. Walking the Park • Existing Issues 18
  19. 19. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 1. Walking the Park • Existing Issues 19
  20. 20. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 1. Walking the Park • Existing Issues 20
  21. 21. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 1. Walking the Park • Existing Issues 21
  22. 22. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 2. Assessments & Evaluation 15 Potential Stormwater Retrofits Identified Types of Practices/BMPs Considered: o Bioretention Cells o Engineered Dry Swales w/ & w/out check dams o Step Pool Storm Conveyance o Outfall Stabilization o Stream Restoration o Floodplain Reconnection o Riparian Plantings o Land Cover Conversion o Rain Gardens o Conversions of Existing Dry Detention basin to Extended Detention w/ wetlands o Permeable Pavement o Soil Compost Amendments o Wetland Creation o Wetland Enhancement 22
  23. 23. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 2. Assessments & Evaluation For each potential BMP evaluated: 1.) Watershed & BMP Description 2.) Quantitative Assessment 3.) Qualitative Assessment 23
  24. 24. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 3. Stormwater Retrofits (Phase 1) 24 BMP Type ID # Phase Step Pool Storm Conveyance 1 1 Step Pool Storm Conveyance 2 1 Floodplain Reconnection & Wetlands 3 2 Urban Bioretention Basin & Dry Swale 4 2 Engineered Dry Swale w/ Check Dams 5 2 Engineered Dry Swale 8 2 Urban Bioretention Basin 9 2 Converted Dry Detention Basin to Extended Detention & Wetlands 10C 3 Bioretention Cell 11A 3 Bioretention Cell 11B 3 Engineered Dry Swale 11C 3 Engineered Dry Swale 11D 3
  25. 25. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 3. Stormwater Retrofits (Phase 1) 25 BMP #1 – Outfall Stabilization w/ Step Pools Invasive Plant Removal
  26. 26. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 3. Stormwater Retrofits (Phase 1) 26 BMP #1 – Outfall Stabilization w/ Step Pools Contributing Drainage Area = 39.56 Acres; storm drain network draining residential neighborhoods Flow Events: Q1 = 34.7 cfs; Q100 = 230.16 cfs
  27. 27. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 3. Stormwater Retrofits (Phase 1) 27 BMP #1 – Outfall Stabilization w/ Step Pools Outfall Stabilization
  28. 28. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 3. Stormwater Retrofits (Phase 1) 28 BMP #1 – Outfall Stabilization w/ Step Pools Riparian Tree & Shrub Planting Plant Palette Approx. # Shrubs 490 Understory Trees 144 Canopy Trees 94 Specimen Trees 12 NOTE: Plant counts approximately only; planting palette will be revised.
  29. 29. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 3. Stormwater Retrofits (Phase 1) 29 BMP #2 – Outfall Stabilization w/ Step Pools Contributing Drainage Area = 20+ Acres; storm drain network draining residential neighborhood & roadside ditch Flow Events: Q1 = 12.8+ cfs; Q100 = 80+ cfs
  30. 30. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 3. Stormwater Retrofits (Phase 1) 30 BMP #2 – Outfall Stabilization w/ Step Pools 2nd Pedestrian Bridge Access & Drainage
  31. 31. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 3. Stormwater Retrofits (Phase 1) 31 BMP #2 – Outfall Stabilization w/ Step Pools Existing Channel Erosion Channel Incision
  32. 32. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 3. Stormwater Retrofits (Phase 1) 32 Step Pool BMP #2 – Outfall Stabilization w/ Step Pools
  33. 33. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits (Phase 2) 33 BMP #3 – Floodplain Reconnection & Wetland Creation/Enhancement
  34. 34. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits (Phase 2) 34 BMP #3 – Floodplain Reconnection & Wetland Creation/Enhancement
  35. 35. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits (Phase 2) 35 BMP #4 – Bioretention Cell & Dry Swale
  36. 36. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits (Phase 2) 36 BMP #5 – Engineered Dry Swale w/ Check Dams
  37. 37. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits (Phase 2) 37 BMP #5 – Engineered Dry Swale w/ Check Dams
  38. 38. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits (Phase 2) 38 BMP #8 – Engineered Dry Swale
  39. 39. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits (Phase 2) 39 BMP #9 – Bioretention Basin
  40. 40. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits (Phase 3) 40 BMP #10C – Converted Dry Detention Basin to Extended Detention & Wetland Creation
  41. 41. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits (Phase 3) 41 BMP #10C – Converted Dry Detention Basin to Extended Detention & Wetland Creation
  42. 42. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits (Phase 3) 42 BMP #10C – Converted Dry Detention Basin to Extended Detention & Wetland Creation
  43. 43. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits (Phase 3) 43 BMP #10C – Converted Dry Detention Basin to Extended Detention & Wetland Creation
  44. 44. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits (Phase 3) 44 BMP #11A & 11B – Bioretention Cells
  45. 45. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits (Phase 3) 45 BMP #11C & 11D – Engineered Dry Swales
  46. 46. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits (Phase 3) 46 BMP #11C & 11D – Engineered Dry Swales
  47. 47. Nottoway Park Stormwater & Water Quality Improvements Stormwater Planning Division 4. Stormwater Retrofits 47
  48. 48. Nottoway Park BMP Retrofits Project DPWES Stormwater Planning Division Project Schedule • Project Community Meeting (June 20, 2016) • Phase 1 Design Completion ~ 2-3 months • Phase 1 Construction ~ Fall 2016 • Phases 2 & 3 Design Completion ~ 9 months • Phases 2 & 3 Construction ~ Late Summer/Fall 2017 * “Pardon our Dust” meetings to be held with contractor prior to construction of each phase. 48
  49. 49. Additional Information For additional information, please contact www.fairfaxcounty.gov/dpwes Nottoway Park BMP Retrofits Project DPWES Stormwater Planning Division 49 Joe Riley-Ryan, Project Manager Matt Meyers, Branch Chief Watershed Projects implementation Branch - North 703-324-5500 Joseph.Riley-Ryan@fairfaxcounty.gov Matthew.Meyers@fairfaxcounty.gov

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