
By Brian Sliger, Erik Waligorski, Matoya Darby & Bob Isaac
King County’s Eastside Interceptor (ESI) collects the majority of wastewater flows from the Puget Sound Area Cities of Kirkland, Bellevue, Mercer Island, Sammamish, Issaquah, Newcastle and Renton, and conveys it to the County’s South Treatment Plant. This aging reinforced concrete pipe (RCP) interceptor was constructed over 50 years ago and corrosion caused by hydrogen sulfide (H2S) gas has begun to take its toll on the pipe’s interior.
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