Secondary Clarifier No 1 Rehabilitation Project

The City of Santa Rosa is soliciting bids for the Secondary Clarifier No 1 Rehabilitation Project (Contract C01979) at the Laguna Treatment Plant in Santa Rosa, California. The scope of work involves the demolition, replacement, and resurfacing of critical aging components, including the cast iron clarifier drive, influent well, rake arm, scum baffle, and effluent launder. The project also requires comprehensive electrical, instrumentation, and control upgrades, such as new lighting and low voltage wiring, as well as mechanical piping and structural improvements including seismic anchorage, metal fabrications, and surface painting. Bids are due by October 27, 2026, and the contract will be awarded to the responsible bidder offering the lowest responsive price. Qualified contractors must hold a Class A California contractor's license and be registered with the California Department of Industrial Relations. Performance and payment bonds for 100 percent of the contract price are required, and the project is subject to prevailing wage requirements. Work is restricted to Monday through Friday, from 7:00 AM to 4:00 PM, with seasonal restrictions limiting out-of-service work to the period between May 1 and October 31. The clarifier must be operational between November 1, 2027, and April 30, 2028. Acceptance of the work is contingent upon rigorous performance testing, including a 30-day problem-free operation period for scum removal equipment and specific consecutive-day functionality tests for the solids collection mechanism.