Working for a safe, affordable, vibrant, innovative, and interconnected city.
Learn More Home Page This Department

Water System Projects


Seattle Public Utilities (SPU) has replaced six of its open reservoirs with underground structures that will improve the quality and security of our water supply. The reservoir covering program also provided 76 acres of new open space. Reservoirs that have been replaced with underground structures include Magnolia (1995), Lincoln (2004), Myrtle (2008), Beacon (2009), West Seattle (2010) and Maple Leaf (2012). Reservoir Covering


SPU will replace a large water main on Western Avenue from Yesler to Spring Streets. The 110-year-old pipe is at risk for a water main break due to the ground settlement that has occurred in Pioneer Square. Western Avenue