Design completion and approval for construction are scheduled to be complete in summer 2021. Construction is tentatively scheduled to begin in summer 2023, dependent upon future budget availability and allocations.
Restoration of approximately 7,600 linear feet along two tributaries to Colvin Run within Lake Fairfax Park to address actively incising and widening channels. The project will restore the ecological form and function of the stream channels and riparian areas, improve water quality and enhance natural habitats.
The primary goals of the restoration are:
Raise channel elevation to reconnect the stream with its floodplain
Reduce stream bed and bank erosion
Improve water quality via channel stabilization, floodplain connectivity and hyporheic zone enhancements
Maintain access to the channels and improve crossings within the park
The project is located in Lake Fairfax Park, west of Hunter Mill Rd, in the Difficult Run Watershed and in the Hunter Mill District.
Improvement of water quality and removal of Nitrogen, Phosphorous and Total Suspended Solids via channel stabilization, native vegetation, floodplain connectivity and hyporheic zone enhancements.
The project is in the design phase.
Start of Construction
Substantial Completion of Construction
What to Expect
Construction access will be from Lake Fairfax Park, off of Lake Fairfax Drive and Hunter Mill Road.
Project Cost and Funding Source
Construction of the Colvin Run Phase II Project is estimated to cost $3.2 million. Stormwater projects are funded through the county Stormwater Service District.
Presentations to the Community
Presentations will be posted as available.
For more information please email Project Manager Justin Pistore, Stormwater Planning Division, Department of Public Works and Environmental Services, or call 703-324-5685, TTY 711.