Sturgeon Bay Utilities WWTF Solids Handling Improvements

The work shall consist of approx. the demolishing of three (3) blowers and providing three (3) new blowers, demolishing fine bubble diffused aeration systems in three (3) aeration tanks and providing new fine bubble diffused aeration systems in the three (3) aeration tanks, demolishing and providing new dissolved oxygen (D.O.) meters, rehabilitating two (2) existing blowers (Contract Allowance), demolishing two (2) return activated sludge (RAS) pumps and providing two (2) new RAS pumps, demolishing a waste activated sludge (WAS) pump and providing a new WAS pump, providing a new fine screen with washer/compactor, demolishing and providing new coagulant feed lines, concrete repair, demolishing a motor control center and providing a new motor control center, heating and ventilation improvements, demolishing and providing new lights, plumbing improvements, providing new doors, new instruments, new controls and other items described in the Bidding Documents for the Wastewater Treatment Facility Aeration System, RAS/WAS Pumping and Fine Screen Improvements Project complete and operational for the Sturgeon Bay Utilities Wastewater Treatment Facility. See outside links for more details.

Work includes new Dewatering and Drying Building to house sludge dewatering belt filter presses (BFPs), polymer dilution and feed systems, a sludge belt dryer and appurtenances, and supporting equipment; an odor control system to serve the Dewatering and Drying Building; a covered dried biosolids storage facility; modifications inside the Sludge Holding Tanks Control Building, including the removal of an existing plunger-type sludge pump and installation of a new progressing-cavity BFP feed pump with sludge grinder; improvements to the sludge holding tanks, including the installation of coarse bubble air diffusers in three holding tanks, a new outdoor blower facility, and air piping connecting the blowers to the diffusers; heating, ventilation and air conditioning for new facilities, as well as demolition and modifications to existing facilities; plumbing for new facilities; electrical for new facilities, and demolition and modifications to existing facilities; instrumentation and controls for new facilities and modifications to existing facilities; yard piping, grading, paving, and landscaping; installation, maintenance and removal of all erosion and sediment control, and other environmental protection measures, including all permits and approvals required; testing, start-up, training, and miscellaneous work; site cleanup and restoration.

The project includes the following work: installation of new dewatering box and related appurtenances, rehabilitation of existing biological treatment basins, removal of existing blower, installation of new 50 hp blower, installation of headworks cover, replacement of clarifier trough cleaning brushes, and miscellaneous electrical improvements.

This solicitation requests modernization of one geared traction passenger elevator in the Solids Handling Building, including a new controller, door operator, signal fixtures, wiring, AC motor, rope brake, and reconditioning of governor and machine; it includes related electrical, fire life safety, and HVAC work. The estimated construction cost is $630,000 and the contract term/project duration is 365 consecutive calendar days. A mandatory pre-bid conference is scheduled for 2026-01-13 at 10:00 AM PST at 1301 Andersen Dr., San Rafael, CA and bids are due 2026-01-29.