Notice of Intent for: Alternative Subcontractor Specialty Equipment – UV Equipment Subcontractor (SC/CM)

Hoffman Construction Company of Washington (GC/CM) has been selected as General Contractor/Construction Manager (GC/CM) for the King County MDCSO Wet Weather Treatment Station (WWTS) Project. The WWTS project is a new 240 million gallons per day (MGD) capacity wet weather treatment station, which operates intermittently, and provides physical treatment steps (screening, solids removal and disinfection) during heavy storms to prevent untreated overflows into the east waterway at the mouth of the Duwamish River. The preconstruction phase of the project commenced in April 2026 and is anticipated to continue through Q2 2028. Construction is expected to begin in Q2 2028 and be completed by the end of 2034. Specifically, the project includes: Demolition of existing structures and foundations, shoring and excavation work, construction of a below-grade 4 million-gallon (MG) equalization basin, and soil management; Influent screening, equalization and pumping, construction of a vendor supplied ballasted sedimentation treatment system and ultraviolet (UV) disinfection system, solids handling and storage, odor control systems, multiple support structures including: electrical buildings, maintenance building, control building, chemical storage, and site surface improvements; Site development challenges are expected to include shallow groundwater and deep liquifiable soils with potential for seismically induced settlement (necessitating deep foundations or soil improvement). The GC/CM intends to select an alternative subcontractor for UV equipment in accordance with the provisions of RCW 39.10.385. The reasons for utilizing this alternative procurement process includes, but is not limited to, the following: Allows the GC/CM, in partnership with King County WTD, to select subcontractor partners based primarily on qualifications and experience rather than solely basing the selection on the lowest priced responsive bid received; Provides opportunity to engage the subcontractors early as a collaborative project partner throughout design and construction, which will support reducing risk of errors, omissions, and/or unclear scope in the construction documents. In addition, constructability, cost savings, and better coordinated shutdown plans support key project success factors such as quality, cost and schedule certainty, which ultimately benefits KC ratepayers and complies with the project’s Consent Decree requirements; Allows response to volatility in the construction market and the challenges in the supply chain. With a subcontractor involved during design, they can analyze and recommend materials and/or equipment specific to their work for early purchase/procurement prior to construction to avoid market price increases and/or long lead times that could otherwise impact the project budget and ability to meet the Consent Decree schedule; Additionally, the subcontractors will provide expertise during design and construction for phasing and sequencing construction, and commissioning upgrades. The public hearing will occur in person at 10:30 am PST, September 30, 2026, at Hoffman Construction Company of Washington, 1700 - 7th Avenue, Suite 1400, Seattle, WA 98101. All interested parties may provide both written and verbal comments at the hearing regarding the justification, evaluation criteria and weighting, and protest procedures Interested parties may also attend the public hearing virtually utilizing the Microsoft Teams link posted at https://www.hoffmancorp.com/trade-partners/#projects-bidding or call in (audio only) utilizing the following information: +1 971-337-2364,, 238750807# United States, PortlandPhone Conference ID: 238 750 807# The evaluation criteria and applicable weight given to each criterion, including definitions of what should be considered specified general conditions and what should be considered fee, justification for using the alternative process, and protest procedures are available upon request. Requests for information and written comments may be submitted to Kevin Ryan (206-255-7572) at Kevin-Ryan@hoffmancorp.com and received no later than the time of the hearing. Protests related to the use of the alternative selection process must be submitted to King County, Valerie Tokumoto at vtokumoto@kingcounty.gov within 7 calendar days of the final determination.