SPU to begin assessing sewer overflow at 24th Ave NW
In the week of Jan. 28, Seattle Public Utilities will begin assessing the combined sewer overflow area at the end of 24th Ave NW.
The overflow, NPDES 150, is one of the big problem spots in Ballard which gushes out sewage during a storm event. (We covered this more in detail in a cover story a couple of weeks ago.)
Turns out, the pipe is old. It's a 30-inch diameter wooden pipe which can't handle the combined volume of stormwater and sewage, allowing raw sewage to gush into Salmon Bay during storm events. the outfall pipe originally extended about 62 feet from sure, SPU said, but it's deteriorated so severely that now it only extends about ten feet.
In November, along with NPDES 151 (which shares the same overflow point), the pipe was responsible for spilling 3,350,000 gallons of sewer overflow into Salmon Bay.