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Bradley Acres Pond Retrofit Project

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Bradley Acres Pond Retrofit Project

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Bradley Acres Pond Retrofit Project

  1. 1. A Fairfax County, VA, publication Department of Public Works and Environmental Services Working for You! Bradley Acres Pond Retrofit Project Contract No. CN14125118 Project No. SD-000031-106 Task Order No. 16 Hunter Mill District May 18, 2015
  2. 2. Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch Bradley Acres Pond Retrofit Post Construction
  3. 3. Project Details Bradley Acres Pond Retrofit Capital Facilities/Utilities Design and Construction Division/Transportation Stormwater Construction Branch Description: The Bradley Acres Pond Retrofit project was substantially completed on March 16, 2015. The project is located in the Horespen Creek Watershed and is bounded by residential units from the northwest, southeast, an open space from the northeast and bounded by West Ox Road from the south. The project converted an existing extended detention dry pond to a constructed stormwater wetland pond. The project provides improved down stream water quality benefits and detention improvement. The water quality benefits realized by this project will be the removal of 21.19 lbs./year of total phosphorus, 97.77 lbs./year of total nitrogen and 3,751.99 lbs./year of total suspended solids. Project Overview: • Removed the existing trickle ditch • Excavated and constructed three shallow marshes • Constructed step pool conveyance channel and plunge pool below the existing 42”X27” culvert • Constructed two imbricated stone weir structures • Constructed an access maintenance road with 2- 24” RCP culvert structure • Re-graded the pond as per the approved plan • Seeded all the disturbed areas with selective Native Grass, Upland and High Marsh Seed mix • Replanted the site with a mix of trees and plugs Project Team: • Stormwater and Planning Division–Martin Chang • Utilities Design and Construction Division- Yousef Rayyan • Utilities Design and Construction Division- Keith Ferrell • Land Acquisition Division- Clinton Preston • Surveyor- Gregory Harper
  4. 4. Bradley Acres Pond Retrofit Capital Facilities/Utilities Design and Construction Division/Transportation Stormwater Construction Branch Hunter Mill District, VA, Tax Map #25-3 Project Site
  5. 5. Bradley Acres Pond Retrofit Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch Pre-Existing Conditions
  6. 6. Capital Facilities/Utilities Design and Construction Division/Transportation Stormwater Construction Branch Bradley Acres Pond Retrofit Post Construction New Access Road Shallow Marsh #3 Stone Weir #2 Shallow Marsh #2 Stone Weir #1 New Step Pool Conveyance Channel Shallow Marsh #1 An Existing RC Outlet Pipe 42”x27”
  7. 7. Capital Facilities/Utilities Design and Construction Division/Transportation Stormwater Construction Bra Bradley Acres Pond Retrofit Pre-Existing Conditions The Inflow RC Outlet 42”x27” Pipe Conditions
  8. 8. Bradley Acres Pond Retrofit Capital Facilities/Utilities Design and Construction Division/Transportation Stormwater Construction Branch Post-Construction
  9. 9. Bradley Acres Pond Retrofit Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch Pre-Existing Conditions
  10. 10. Bradley Acres Pond Retrofit Post Construction Capital Facilities/Utilities Design and Construction Division/Transportation Stormwater Construction Bra West Ox Rd Access Road Gate 2- 24” RCP Culvert Structure
  11. 11. Additional Information For additional Information, please call www.fairfaxcounty.gov/dpwes Ben Boxer, Public Information Officer 703-324-5880, TTY 711 Ben. Ben Boxer, Public Information Officer 703-324-5880, TTY 711 Ben. Ben Boxer, Public Information Officer 703-324-5880, TTY 711 Ben.Boxer@fairfaxcounty.gov Irene Haske, Public Information Officer 703-324-5500, TTY 711 Irene.Haske@fairfaxcounty.gov Capital Facilities/Utilities Design and Construction Division/Transportation Stormwater Construction Branch

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