Sioux City Granicus #11

Sioux City Phase 1 Wastewater Treatment Plant Upgrades and Construction

The City of Sioux City, Iowa, is seeking bids for a major Phase 1 upgrade of its wastewater treatment plant. - Buyer: City of Sioux City, Iowa; municipal government in Woodbury County. - Estimated project value: Approximately $325 million. - Scope: Upgrade, replace, rehabilitate, and construct wastewater treatment facilities and related systems to address safety and odor concerns, improve reliability, and expand capacity. - Work includes preliminary treatment building improvements; mechanical screen and grit equipment replacement; HVAC upgrades; primary clarifiers; new primary sludge pumping and intermediate lift stations; and aeration tank rehabilitation for a three-stage treatment process. - The project also includes aeration blower replacement, final clarifier mechanism replacements and a new final clarifier, replacement of the RAS pump station, rehabilitation of one anaerobic digester for sludge storage, plant-wide odor control, emergency generators, main switchgear replacement, and SCADA upgrades. - Related work includes safety and code improvements, demolition of specified unused structures, and associated HVAC, plumbing, electrical, instrumentation, and site/civil work. - OEMs and vendors: No equipment manufacturers, brands, or construction vendors are identified in the provided materials. No part numbers or equipment quantities are specified. - Notable requirements: American Iron and Steel requirements apply to covered products; Iowa statutory preferences also apply, subject to the stated federal-funding exception. - Performance: Work starts after Notice to Proceed and must meet the solicitation's stated completion deadline. No option years or subscription term are specified.

Description

The City of Sioux City is soliciting sealed bids for Phase 1 of a wastewater treatment plant improvements project intended to address safety and odor concerns, enhance reliability, and expand capacity. Planned work includes upgrades and replacements to preliminary treatment, clarifiers, sludge and pumping systems, aeration and blower systems, odor control, emergency power, switchgear, and SCADA, as well as rehabilitation, demolition, and related site, HVAC, plumbing, electrical, and instrumentation work. Bids are due October 29, 2026, at 1:00 p.m. local time, and work must be completed on or before December 31, 2031. Each bid must include a bid security instrument equal to 10% of the bid amount; the contract will be awarded to the lowest responsive, responsible bidder.

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