Wastewater Treatment Facility Digester Cleaning #2489

The City of Yakima awarded a fixed‑price contract to Selland Construction, Inc. for comprehensive cleaning and maintenance of the wastewater treatment plant’s digesters, including sludge removal, pipe work, and optional valve installation. The scope covers mobilization, unexpected site changes, cleaning of primary and secondary digesters, control‑building modifications, and a potential add‑on for a knife‑gate valve. Financially, the contract offers three cost scenarios ranging from roughly $1.27 M to $1.78 M (including tax), with the optional valve adding $85 K to each. The procurement was conducted via full and open competition, with bids opened on March 1 2019 and the award made on March 4 2019. • Primary work: digester sludge removal and cleaning for both primary and secondary units. • Optional work: installation of a knife‑gate valve (additive $85 K). • Contract type: lump‑sum, fixed‑price with optional additive item. • Awarded to a single regional contractor (Selland Construction, Inc.) based in Wenatchee, WA.