North Henderson project area.
Construction will begin on the Seward Park site in early 2015. The park remains open, but parking will be affected. View parking map (pdf).
The North Henderson CSO Reduction Project (North Henderson) will reduce the amount of untreated sewage and stormwater that overflows into Lake Washington at two outfalls located offshore of:
To reduce the frequency of sewage overflows to no more than one per year per outfall, on average, SPU plans to complete two new underground storage facilities in North Henderson in 2017 to store excess combined sewage and stormwater during major rain.