The primary sedimentation basins were the oldest part of the Budd Inlet Treatment Plant – built over 60 years ago. Wastewater flowing to the plant comes from almost 90,000 homes, apartments, and commercial/industrial connections served by the sewer utilities of Lacey, Olympia, and Tumwater. The renovation project began in September 2011 to construct two new primary sedimentation basins and install odor control facilities, piping, and chemical and electrical control systems to support the basins.
The electrical improvements included a new 15kv substation and new electrical and control systems integrated into the existing plant. The project underwent extensive scope revisions, including a new utilidor that divides the project’s construction access in half and a new 15kv unit substation.