Industrial Development Complex Landfill Cover

Energy Northwest is requesting bids for Industrial Development Complex landfill closure work at Columbia Generating Station, 76 North Power Plant Loop, Richland, Washington, under IFB No. 717932, with bids due September 30, 2026, at 1:00 p.m. local time and written questions due September 15, 2026, at 1:00 p.m. Bidders must be registered Washington State contractors meeting state responsibility criteria, including current contractor registration, Unified Business Identifier number, Industrial Insurance coverage, Employment Security Department registration, Department of Revenue tax registration, and required contractor training completion.

The scope encompasses closure of the IDC landfill as a limited-purpose landfill under Washington Administrative Code 173-350, with work performed outside the Protected Area. Deliverables include site grading to pre-capping elevations, scarification and re-compaction, installation of a 30-mil HDPE geomembrane liner with two feet of native sand cover, construction of a 15-foot-wide gravel access road (approximately 900 linear feet), installation of a landfill gas collection system with perforated HDPE header pipe, and final as-built surveys and documentation. Estimated quantities are 10,800 cubic yards of cover soil and 95,000 square feet of 30-mil HDPE liner.

Bids must be submitted as firm fixed price. Washington State prevailing wage requirements per RCW 39.12 and chapter 296-127 WAC apply, with rates effective September 1, 2026, for Benton County. Bidders must submit a bid bond equal to 5 percent of total bid price and, upon award, a performance and payment bond equal to 100 percent of contract price. A 5 percent retainage will be held from all invoices and released only after affidavits of wages paid receive approval from the Washington State Department of Labor and Industries and three required state agencies. Washington State sales tax applies to all invoices.

Submission requirements include equivalent project experience (minimum two projects within the past five years), key personnel resumes, OSHA safety statistics, a Level 1 project schedule, a Schedule of Values, a Site-Specific Safety and Health Plan if bid exceeds $1 million or meets risk-significant work criteria, and a list of proposed subcontractors. Contract award is anticipated within 45 days of bid opening.