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.