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.

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. Robey Avenue Outfall Restoration
Stormwater/Maintenance and Stormwater Management Division
Completed Project
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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
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4. Robey Avenue Outfall Restoration
Stormwater/Maintenance and Stormwater Management Division
Project Location: Tax Map 059-3, Mason District
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5. Robey Avenue Outfall Restoration
Stormwater/Maintenance and Stormwater Management Division
Pre-Construction Condition
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6. Robey Avenue Outfall Restoration
Stormwater/Maintenance and Stormwater Management Division
Construction Photos
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7. Robey Avenue Outfall Restoration
Stormwater/Maintenance and Stormwater Management Division
Before and After
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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