TMG was the design-builder/general contractor to restore 365 linear feet of stream bank on the north side of Accotink creek and 135 linear feet of stream bank on the south side of the creek channel for the US Army Corps of Engineers. The project is one of seven projects that TMG has completed or has in progress for the USACE at Fort Belvoir’s New Campus East.

Over time, the creek, which runs along the periphery of Davidson Air Field, was creeping closer to Fort Belvoir’s re-chlorination plant. Significant erosion was also affecting local wildlife. TMG worked closely with national design firm PSA Dewberry, which flew their top environmental experts to the site, and the Corps to design a natural stabilization plan. It was devised to protect the shoreline from erosion by placing rock, soil and planting vegetation at designated locations along the stream bank and using the natural flow of the creek to correct itself.

Although the project took weeks to design and plan, it only took TMG four days to complete the actual work - despite the frigid temperature.

Specialty structures included the Longitudinal Peaked Stone Toe Protection (LPSTP), Bendway Weirs, Keys, Living Dikes, and Locked Logs. TMG created temporary stream-flow diversions using inflatable coffer dams to contain sediment. The final phase involved planting several thousand willow tree stakes to establish further stabilization and sediment control. TMG created a detailed Stormwater Pollution Prevention Plan and a Safety Plan for this project.

This project demonstrated TMG’s depth of capability in government and environmental compliance, environmental design and delivery and operating ultra heavy equipment in up to four feet of water without disturbing the surrounding habitat. The project was supported by TMG’s field office at Fort Belvoir New Campus East.