Prior to 1890, Seattle relied on a haphazard assortment of sewers and cesspools that, at best, drained into surrounding lakes and salt water. Faced with recurring threats of waterborne diseases including typhoid and cholera, City Engineer Benezette Williams designed the Seattle's first centralized combined sewage system plan in 1891. This plan sought to remove as much city sewage as possible into the salt water of Elliott Bay and the Puget Sound with more limited drainage into the fresh water of Lake Washington. Although originally untreated, the City undertook a succession of steps starting in the late 1910's to remove solids, begin primary sewage treatment, and eventually separate storm water from raw sewage. Metropolitan King County took over the City's wastewater treatment responsibilities in the 1960's, but Seattle continues to manage its network of storm sewers.
In this image one of the Seattle Engineering Department sewer outfall pipes is seen entering Lake Washington at Alder Street.
Sign in image: Ferry "Issaquah" to Mercer Island; Machine Shop SHS category: Seattle Engineering Department
Physical Description: 1 photographic print mounted on cardboard: b&w ; 7.5 x 9.5 in.
Additional Information: Digital copy of this item available thanks to funding from a 2016 Institute for Museum and Library Services grant. Metadata updated as part of a grant from the Institute of Museum and Library Services administered by the Library Services and Technology Act, through the Washington State Library, a division of the Office of the Secretary of State.
