Building demolished for Ballard Siphon project

Work is moving forward on the Ballard Siphon project, to replace a pair of 75-year-old sewer pipes that run under Salmon Bay. The old wooden pipes convey about 60-million gallons of sewage to the West Point Treatment Plant near Discovery Park every day and are at the end of their lifespan.

This week, King County contractors will demolish a vacant building on Shilshole Avenue NW, the north side of the project. Starting early next month, crews will begin excavating and removing materials from the south side of the bay on West Commodore Way. “Construction activities at both sites will continue to intensify through October with shaft excavation at the north site beginning in early November,” an update sent out by King County Water Quality Manager Doug Marsano.

The 24-hour project hotline is 206-296-3848 or you can click here. (Old photo courtesy Seattle Municipal Archives.)

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