The Lenox Drive Outfall Restoration Project in Fairfax County, VA restored 100 linear feet of eroded channel behind properties on Lenox Drive. The project addressed public safety concerns and stabilized the channel using natural stream design techniques like imbricated stone plunge pools and cross vane rock structures. It also included revegetation with native plants to promote reforestation and is estimated to provide water quality improvements through reduced nitrogen, phosphorus, and solid runoff. The project was completed in October 2015 and involved design by AMEC Environment & Infrastructure and landscaping by Suzy Foster, with construction by Utilities Unlimited.

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

2. Lenox Drive Outfall Restoration
Maintenance and Stormwater Management Division
Looking downstream Looking upstream
2

3. Project Details
Lenox Drive Outfall Restoration
Maintenance and Stormwater Management Division
Description:
The Lenox Drive Outfall Restoration Project was substantially completed on October 30, 2015. The
project consisted of the restoration of 100 linear feet of eroded channel located in a Resource
Protection Area and behind the properties of 4203 & 4205 Lenox Drive. The goals of the project were
to address public safety concerns, stabilize a deeply eroded channel by using natural stream design
techniques, and provide enhanced water quality.
Project Overview:
• Construct an imbricated stone plunge pool and seven single step cross vane rock structures
• Install rock cascade to tie in and match grades of the newly constructed outfall channel and the
receiving perennial stream
• Revegetate with native plants, trees and shrubs to promote reforestation in disturbed areas
• Provide reduction of 5.3 lbs of Total Nitrogen per year, 2.4 lbs of Total Phosphorus per year, and
4,639 lbs of Total Suspended Solids per year
Project Team:
• Project Manager: Jack Meritt, Maintenance and Stormwater Management Division
• Project Design: AMEC Environment & Infrastructure, Inc.
• Landscape Architect: Suzy Foster, Stormwater Planning Division
• Contractor: Utilities Unlimited, LLC
3

4. Maintenance and Stormwater Management Division
Project Location: Tax Map 058-3 Braddock District
Lenox Drive Outfall Restoration
4
Project Site

5. Maintenance and Stormwater Management Division
Preconstruction Conditions
Lenox Drive Outfall Restoration
5

6. Maintenance and Stormwater Management Division
Lenox Drive Outfall Restoration
Construction Photos
6

7. Before After
Lenox Drive Outfall Restoration
Maintenance and Stormwater Management Division 7

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