Storm drain pipes end at outfalls, where water leaves the pipe and enters local streams. Over time, runoff can create erosion and the outfall infrastructure can degrade or break. Outfall rehabilitation projects repair the infrastructure and stabilize steep slopes.
Outfall infrastructure condition is evaluated as part of Arlington's stream assessments. By reducing erosion near streams, outfall repair projects also help fulfill the water quality requirements of the Stormwater Permit issued to Arlington County by Virginia Department of Environmental Quality.
Project goals can typically include:
Some of the outfall stabilization projects Arlington has completed include:
Windy Run Outfall
26th St Outfall
Randolph St Outfall
Woodrow St Outfall