Clarifier Preservation Project

The City of Durango, Colorado is requesting bids on the 2026-0048-2020 SRWRF Clarifier Preservation Project, with bids due November 11, 2026 at 3:00 p.m. local time and questions due October 29, 2026. No pre-bid meeting will be held.

The scope comprises cleaning, surface preparation, and coating of all immersed components in Secondary Clarifiers #3 and #4 at the Santa Rita Water Reclamation Facility, addressing corrosion of the original hot-dipped galvanized coating on submerged steel surfaces. Work includes treating the center pipe, cage, influent well, cylindrical manifold, unitube header, supports, truss arm, baffles, surface skimmer, ramp, scum trough, and scum baffle. The contractor must remove and recoat the scum baffle and brackets while reusing stainless steel hardware. Full containment of the work site is required to protect clarifier drive systems.

Construction must be completed within a 90-calendar-day window from Notice to Proceed with no multiple starts or stops permitted. Liquidated damages are $1,500 per calendar day for delays beyond completion.

Bidders must submit a 5% bid bond and provide proof of experience through at least three similarly completed projects. Current insurance requirements include Workers' Compensation, Comprehensive General Liability of $1 million per occurrence and $2 million aggregate, and Comprehensive Automobile Liability of $500,000 per occurrence and $1 million aggregate. Upon award, the contractor must provide a Performance Bond and Labor and Material Payment Bond, each at 100% of the contract price. A one-year warranty on workmanship and materials is required from the date of final acceptance.

The contractor will coordinate with an owner-hired NACE-certified coating inspector for quality control and must obtain a City Business License and complete a W-9 prior to project commencement. The successful bidder has 15 calendar days from Notice of Award to execute the agreement and provide required documentation; the City will issue Notice to Proceed within 10 calendar days of agreement execution.