flatlick branch - phase 1 stream restoration
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A Fairfax County, VA, publication
Department of Public Works and Environmental Services
Working for You!
Flatlick Branch – Phase I Stream Restoration
January 6, 2017
Contract No. CN13125088 Project No. SD-000031-010Sully District
Flatlick Branch – Phase I Stream Restoration
Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch
Project DetailsThe Flatlick Branch – Phase I Stream Restoration project was substantially completed on December 8, 2016. The project involved the restoration of over 1,850 LF of the Flatlick Branch stream and associated tributaries in the Cub Run Watershed, and retrofitting an existing stormwater management basin into a Level II constructed wetland.
Project Overview:• Provide stream improvements to this stream as well as two connecting tributaries• Upgrade an existing stormwater detention pond from a dry pond to a Level II constructed wetland • Remove and replace a failed fair weather stream crossing identified on the countywide trail plan • Replace a section of 24-inch diameter sanitary sewer main• Through a partnership with the Fairfax County Park Authority, the trail system within the stream valley park was enhanced to
an asphalt trail• Invasive species treatment for the site and installing 11,000 native plants
Flatlick Branch – Phase I Stream Restoration
Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch
Benefits: • Pollutant Removal Credit provided towards meeting the Chesapeake Bay Total Maximum Daily Load (TMDL).
• Phosphorus removal – 140 lbs / year• Nitrogen removal – 1,140 lbs / year • Suspended solids – 34 tons/year
Project Team:• Stormwater Planning Division – Fred Wilkins• Stormwater Planning Division – Chris Ruck• Fairfax County Park Authority – Ryan Stewart• Wastewater Collection Division – Shwan Fatah• Utilities Design and Construction Division (UDCD) - Jay Horstman• Project Inspector, UDCD – Bharat Khanal
Flatlick Branch – Phase I Stream Restoration
Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch
Project Area
50 Lee Jackson Memorial Highway
Flatlick Branch
Chantilly, VA, Tax Map No. 44-2Sully District
Flatlick Branch – Phase I Stream Restoration
Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch
Construction
Flatlick Branch – Phase I Stream Restoration
Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch
Sewer Main Replacement
Flatlick Branch – Phase I Stream Restoration
Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch
Fair Weather Stream Crossing
Flatlick Branch – Phase I Stream Restoration
Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch
Fair Weather Stream Crossing
Flatlick Branch – Phase I Stream Restoration
Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch
Level II Constructed Wetland - Construction
Flatlick Branch – Phase I Stream Restoration
Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch
Level II Constructed Wetland
Flatlick Branch – Phase I Stream Restoration
Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch
Asphalt Trail
Before After
Flatlick Branch - Phase I Stream Restoration
Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch
Additional Information
For additional Information, please call
www.fairfaxcounty.gov/dpwes
Flatlick Branch – Phase I Stream Restoration
Capital Facilities/Utilities Design and Construction Division/Transportation and Stormwater Construction Branch
Irene Haske, Public Information Officer703-324-5821, TTY 711
SWPDmail@fairfaxcounty.gov
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