Old Stony Brook in Flood.
Sewage flows down Stony Brook Valley Sewer, while stormwater is flowing down West Roxbury Low Level Sewer. When the flood is too big, combined stormwater/sewage flows to Stony Brook Interceptor and into Old Stony Brook Conduit. When it gets to the Fens Gatehouse #2, it does not go into the Fens. It bypasses into the Old Stony Brook Conduit to the Charles Gatehouse and then to the Charles River.



 blue = stormwater

 brown = sewage

 green = mixed

Copyright © 2002 by Kathy Poole and the University of Virginia