green hollow court outfall restoration

A Fairfax County, VA, publication

Department of Public Works and Environmental Services

Working for You!

Green Hollow Court Outfall RestorationProject Number SD-000031-043Springfield District

December 18, 2015

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Green Hollow Court Outfall Restoration

Maintenance and Stormwater Management Division 2

Project Details

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Green Hollow Court Outfall Restoration

Maintenance and Stormwater Management Division

Description:The Green Hollow Court Outfall Restoration project was substantially completed on October 1, 2015. The project consisted of the construction of a rock cascade and step pool system, 100 linear feet in length, to stabilize a highly eroded outfall and to improve water quality. The project addressed some serious safety concerns, stabilized a severely eroded outfall, and will improve water quality. Project Overview:• Constructed 100 linear feet of rock cascade using large, imbricated stone• Tied a cross vane step pool into the downstream rock cascade using imbricated stone• Stabilized channel banks using coir matting• Revegetated disturbed area with native plants, trees and shrubs to promote reforestation• Reduced Total Nitrogen by 3.9 lbs per year, Total Phosphorus by 1.7 lbs per year, and Total

Suspended Solids by 3,322 lbs per year Project Team:• Design Engineer: Catie Torgersen, Maintenance and Stormwater Management Division• Project Manager: Jack Meritt, Maintenance and Stormwater Management Division • Maintenance & Operations Supervisor: Jonathan Murray, Maintenance and Stormwater

Management Division• Maintenance & Operations Project Manager: Sean Geyer, Maintenance and Stormwater

Management Division 3

Maintenance and Stormwater Management Division

Project Location: Tax Map 079-3, Springfield DistrictGreen Hollow Court Outfall Restoration

Project Site

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Green Hollow Court Outfall Restoration

Maintenance and Stormwater Management Division

Construction Photos

Maintenance and Stormwater Management Division

Post Construction RestorationGreen Hollow Court Outfall Restoration

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Before After

Green Hollow Court Outfall Restoration

Maintenance and Stormwater Management Division 7

Additional Information

For additional Information, please call

www.fairfaxcounty.gov/dpwes

Green Hollow Court Outfall Restoration

Maintenance and Stormwater Management Division

Irene Haske, Public Information Officer703-324-5821, TTY 711

SWPDmail@fairfaxcounty.gov

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