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Robey Avenue Outfall Restoration

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The primary goals of this project were to address public safety concerns, stabilize an eroded channel by using natural stream design techniques and promote the growth of native vegetation. The natural channel design techniques used, such as a reinforced bed mix riffle sections and step pools, reduce the flow velocity, provide stability, and enhance water quality along the streams leading to the Chesapeake Bay. The disturbed areas of the site were restored with native shrubs, plants and trees.

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Robey Avenue Outfall Restoration

  1. 1. A Fairfax County, VA, publication Department of Public Works and Environmental Services Working for You! Robey Avenue Outfall Restoration Project Number: SD-000031-223 District: Mason Watershed: Accotink Creek December 12, 2019
  2. 2. Robey Avenue Outfall Restoration Stormwater/Maintenance and Stormwater Management Division Completed Project 2
  3. 3. Robey Avenue Outfall Restoration Stormwater/Maintenance and Stormwater Management Division Project Details Description: The Robey Ave Outfall Restoration Project was substantially completed on June 13, 2019. The project consisted of restoring 160 linear feet of eroded outfall channel located in the Accotink Watershed. The goals of the project were to address public safety concerns, stabilize a deeply eroded channel by using natural channel design techniques, provide enhanced water quality and promote reforestation with native forest and riparian plantings. Project Overview:  Restore the outfall channel with an imbricated rock step pool system and riffle sections constructed with reinforced bed mix  Stabilize channel banks using coir matting and native vegetation  Revegetate disturbed areas with native plants, trees, and shrubs to promote reforestation  Provide a reduction of 7 lbs. of Total Phosphorous per year, 15 lbs. of Total Nitrogen per year and 2,452 lbs. of Total Suspended Solids per year Project Team:  Project Manager: Jack Meritt, PE, Maintenance and Stormwater Management Division, DPWES  Project Engineer: Stephen Dombroski, Maintenance and Stormwater Management Division, DPWES  Project Inspector: Tom Cameron, Maintenance and Stormwater Management Division, DPWES  Project Design: Wetland Studies and Solutions, Inc.  Construction Contractor: Fort Myer Construction  Revegetation Contractor: GroundFX 3
  4. 4. Robey Avenue Outfall Restoration Stormwater/Maintenance and Stormwater Management Division Project Location: Tax Map 059-3, Mason District 4
  5. 5. Robey Avenue Outfall Restoration Stormwater/Maintenance and Stormwater Management Division Pre-Construction Condition 5
  6. 6. Robey Avenue Outfall Restoration Stormwater/Maintenance and Stormwater Management Division Construction Photos 6
  7. 7. Robey Avenue Outfall Restoration Stormwater/Maintenance and Stormwater Management Division Before and After 7
  8. 8. Robey Avenue Outfall Restoration Additional Information 8Stormwater/Maintenance and Stormwater Management Division For additional information, please contact Irene Haske 703-324-5821 Irene.Haske@fairfaxcounty.gov www.fairfaxcounty.gov/publicworks

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