WMW Culvert Replacements & SB 18C Drainage Improvement

The City of Mercer Island is requesting sealed bids for construction services associated with the WMW Culvert Replacements & SB 18C Drainage Improvement project, with bids due electronically by 4:00 p.m. on August 24, 2026 (Bid Number 2026-AFB-026). The City encourages participation of certified disadvantaged businesses and women business enterprises as prime contractors and subcontractors, though no set-aside or mandatory participation goal is stated.

The scope includes installing new drainage facilities on SE 32nd Street and replacing culverts in multiple locations along West Mercer Way, with work located at the intersection of SE 32nd Street and West Mercer Way and the 5000 block of West Mercer Way. Construction must be completed within 40 working days from the Notice to Proceed, with Substantial Completion required 10 calendar days prior to Final Completion. Local access through SE 32nd Street and West Mercer Way must be maintained at all times during construction; no major construction work is permitted on federal holidays or at times explicitly prohibited in the right-of-way use permit.

The Engineer's estimated project cost is $450,000 to $500,000. Bidders must be licensed Washington State contractors with a current UBI number, maintain Industrial Insurance coverage, and demonstrate adequate financial resources, satisfactory performance records, and appropriate equipment and facilities. Washington State Prevailing Wage rates for King County apply to all work. All bid prices must include wages, benefits, tools, equipment, overhead, profit, bonds, and taxes. A bid deposit equal to 5% of the total bid price, in the form of a bid guaranty bond, postal money order, certified check, or cashier's check, must accompany each bid.

Questions are due by 4:00 p.m. on August 19, 2026, with responses posted by August 21, 2026. No City-led pre-bid meeting will be held; prospective bidders must independently review the project site during publicly accessible hours. The City Council is scheduled to consider award following its September 1, 2026 meeting, with a preconstruction meeting planned for the week of September 7, 2026 and Notice to Proceed anticipated for the week of September 21, 2026.