
Photo by PoPville flickr user Joseph Gruber
From DC Water:
“Six months ago, DC Water placed into service the first 7-mile segment of the Anacostia River Tunnel system to store combined sewage during rain events, keeping sewage overflows from entering the Anacostia River. DC Water today announced that since beginning operation, the tunnel has kept nearly 3 billion gallons of combined sewage overflows (CSOs) out of the Anacostia. Originally projected to reduce CSOs by approximately 80 percent in an average rainfall year, the system has exceeded expectations by achieving an 88 percent capture rate in its first six months of service.
Instead of flowing into the Anacostia, the combined stormwater and sewage is captured and conveyed to the Blue Plains Advanced Wastewater Treatment Plant for treatment prior to discharge to the Potomac River. The new tunnel and wet weather treatment facility have also captured close to 150 tons of trash that otherwise would have ended up in the river. (more…)









