King County Wastewater Treatment Division (WTD) is holding an Open House and requesting industry comments on its upcoming West Point Treatment Plant Raw Sewage Pumps (RSP) and Grit Classifier Replacement project, located in Seattle, WA. King County is utilizing the standard design-bid-build (DBB) delivery method for this project.

PROJECT LOCATION: West Point Treatment Plant; 1400 Discovery Park Blvd, Seattle, WA 98199

PROJECT BACKGROUND: RSP Replacement project is scheduled to be constructed within 6 years, starting mid 2024. Key components of the project include replacing 4 engine driven pumps with 4 -900 HP electrical and associated VFDs; replace 3 hot water boilers with 4 (2X100 & 2X400 HP) boilers; replace current 10-ton bridge crane to 20-ton, seismic upgrade of concrete walls/beams, columns, and girders; modifying main plant switchgear to the two feeder breakers for the new 13.8 KV; new 480V UPS and batteries; replace existing exterior wall panels with new GFRC; Removal and mitigation of contaminants including lead-based paint, PBC, and asbestos; and reconfiguration of the existing HVAC.

Grit Classifier Replacement project is scheduled to be constructed within 2 years, starting mid 2024. Key components of the project include replace the existing four (4) aging grit classifiers, twelve (12) cyclones and replace two (2) hydraulically actuated grit hopper gates with electrically actuated gates. Implement general modifications to associated structural, mechanical, electrical, and process piping related to the grit classifier.

The County intends to award this scope under one (1) contract and the RSP and Grit Classifier project will occur concurrently beginning in 2024.

CONSTRUCTION ESTIMATE: Overall contract award is estimated to be $125 million for both projects combined.

TARGET SCHEDULE: A RFI will be published in conjunction with this meeting on October 18, 2023, Invitation to Bid (ITB) Publication: Approx. February/March 2024, Contract Execution: May 2024, NTP: June/July 2024

EQUITY AND SOCIAL JUSTICE GOALS: King County will establish a minimum required level of ESJ goals that will be set in the near future. King County’s Master Community Workforce Agreement (MCWA) will apply to this project.

POTENTIAL FUNDING SOURCES: King County Utility Funds, Washington State Revolving Fund, Water Infrastructure Finance and Innovation Act (WIFIA)