The Innisvale Drive Outfall Restoration project was substantially completed on December 11, 2018. The primary goals of this project in the Popes Head Creek Watershed were to address public safety concerns, stabilize a deeply eroded channel, and improve water quality. 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 stream 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!
Innisvale Drive Outfall Restoration
Project Number: SD-000031-204
District: Springfield
December 17, 2018

2. Innisvale Drive Outfall Restoration
Stormwater/Maintenance and Stormwater Management Division
Completed Project
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3. Innisvale Drive Outfall Restoration
Stormwater/Maintenance and Stormwater Management Division
Project Details
Description:
The Innisvale Drive Outfall Restoration Project was substantially completed on December 11, 2018. The project
consisted of the restoration of 470 linear feet of eroded outfall channel located in the Popes Head Creek
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 imbricated stone step pools, reinforced bed mix riffle sections and rock
steps
 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 25 lbs. of Total Phosphorous per year, 77 lbs. of Total Nitrogen per year and
9,163 lbs. of Total Suspended Solids per year
Project Team:
 Project Managers: Jack Meritt, PE, Stephen Dombroski, Maintenance and Stormwater Management
Division
 Project Design: Wetland Studies and Solutions, Inc.
 Construction Contractor: Utilities Unlimited, LLC
 Project Inspector: Tom Cameron, Maintenance and Stormwater Management Division
 Revegetation Contractor: GroundFX
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4. Innisvale Drive Outfall Restoration
Stormwater/Maintenance and Stormwater Management Division
Project Location: Tax Map 076-1, Springfield District
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5. Innisvale Drive Outfall Restoration
Stormwater/Maintenance and Stormwater Management Division
Pre-Construction Condition
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6. Innisvale Drive Outfall Restoration
Stormwater/Maintenance and Stormwater Management Division
Construction Photos
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7. Innisvale Drive Outfall Restoration
Stormwater/Maintenance and Stormwater Management Division
Before and After
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8. Additional Information
8Stormwater/Maintenance and Stormwater Management Division
Innisvale Drive Outfall Restoration
For additional information, please contact
Irene Haske
703-324-5821
Irene.Haske@fairfaxcounty.gov
www.fairfaxcounty.gov/publicworks