The Crestleigh Way Outfall Restoration project in Fairfax County, VA involved constructing a plunge pool and step pool system to stabilize an eroded outfall channel near Crestleigh Way for public safety and water quality improvements. A reinforced concrete pipe was installed with a plunge pool, four single step cross vane rock structures were built, and native plants were planted. The project reduces nitrogen, phosphorus, and solid pollutants entering local waterways.

1. A Fairfax County, VA, publication
Department of Public Works and Environmental Services
Working for You!
Crestleigh Way Outfall Restoration
Project Number SD-000031-043
Lee District
December 14, 2015

2. Crestleigh Way Outfall Restoration
Maintenance and Stormwater Management Division 2

3. Project Details
Crestleigh Way Outfall Restoration
Maintenance and Stormwater Management Division
Description:
The Crestleigh Way Outfall Restoration project was substantially completed on September 14, 2015.
The project consisted of the construction of a plunge pool and step pool system to stabilize a highly
eroded outfall channel. The goals of the outfall project were to address public safety concerns, stabilize
a deeply eroded channel by using natural stream channel design techniques, and provide enhanced
water quality.
Project Overview:
• Constructed a plunge pool at the end of the 27” diameter reinforced concrete storm drainage pipe,
using large imbricated stone
• Built four single step cross vane rock structures using natural stream design techniques
• Tie newly constructed channel and existing channel into rock cascade
• Planted native plants, trees and shrubs to promote reforestation in all disturbed areas
• Provided reduction of 2.12 lbs of Total Nitrogen per year, 0.98 lbs of Total Phosphorus per year, and
1,861 lbs of Total Suspended Solids per year
Project Team:
• Design Engineer/Project Manager: Jack Meritt, Maintenance and Stormwater Management Division
• Project Inspector: Tom Cameron, Maintenance and Stormwater Management Division
• Contractor: Utilities Unlimited, LLC
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4. Maintenance and Stormwater Management Division
Project Location: Tax Map 091-3, Lee District
Crestleigh Way Outfall Restoration
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Project Site

5. Maintenance and Stormwater Management Division
Preconstruction Condition
Crestleigh Way Outfall Restoration
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6. Maintenance and Stormwater Management Division
Crestleigh Way Outfall Restoration
Construction Photos
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7. Before After
Crestleigh Way Outfall Restoration
Maintenance and Stormwater Management Division 7

8. Additional Information
For additional Information, please call
www.fairfaxcounty.gov/dpwes
Crestleigh Way Outfall Restoration
Maintenance and Stormwater Management Division
Irene Haske, Public Information Officer
703-324-5821, TTY 711
SWPDmail@fairfaxcounty.gov
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