Project Background

Located in Annandale Community Park in the Accotink Creek Watershed between Hummer Road and Lafayette Village Drive in Annandale. The project designed to restore approximately 1,600 linear feet of stream channel on the mainstem of Coon Branch using natural channel design principles.

Project Description

The project will restore approximately 1,600 linear feet of stream channel. The existing channel is unstable as evidenced by the raw stream banks, undercutting of trees, exposed sanitary sewer, and the deep and widening stream channel. This instability erodes real property, undermines trees causing them to fall, and threatens the structural integrity of the gabion baskets and sanitary and storm sewer infrastructure throughout the corridor.

Project Location

The project is located on Fairfax County Park Authority property and private property. The project site is bounded by Annandale Park to the north, Hummer Road to the east, the Adams Walk Homeowners Association community to the south, and Lafayette Village Drive to the west.

Project Phase

The final design was completed on May 13, 2021 and the project is currently in construction. Construction started on May 23, 2023.

Timeline

Construction is anticipated to be complete in winter 2024.

What To Expect

During construction, residents may hear noises related to construction activities and see construction equipment entering and existing the site. After construction, the stream will have a new channel alignment with natural channel design practices incorporated within the stream. The baseball field closest to Hummer Road will be removed and the property will be reforested. A new pedestrian bridge at Hirst Drive will be installed.

Project Cost and Funding Source

The cost of project design is $800,000.  Construction cost is funded for $3,361,460.  Stormwater projects are funded through the county Stormwater Service District.

Presentations to the Community

County staff met virtually with the community on May 10, 2023, for a pardon our dust meeting prior to construction starting. Check back at this location for meeting presentation PDF. Questions are encouraged and requests for additional information should be forwarded to the Project Manager – see Contact below.

The project webpage is available at the Fairfax County Stormwater Projects Page. Enter Coon Branch @ Annandale Park in the search window in the upper left corner of the screen.

Contact

For more information, email Project Manager Jasdeep Saini, Stormwater Planning Division, Department of Public Works and Environmental Services, or call 703-324-5675, TTY 711.