Description: The project will selectively remove two existing Gravity Belt Thickeners (GBTs) in the OSP 011 thickening process area and replace them with two new Rotary Drum Thickeners (RDTs). The work includes selective demolition, structural concrete and steel grating modifications, mechanical hot-water and drain-piping and equipment upgrades, ventilation modifications, electrical conduit, wires, panels and devices, and instrumentation and controls work with Distributed Controls System (DCS) integration. The work is to be performed in San Francisco, California, and the posting identifies a 20.00% Local Business Enterprise subcontracting requirement.
SpecialDistrict · CA, US
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Oct 8, 2025
Closes
Aug 19, 2026
Provide water pollution control plant, secondary clarifiers rehabilitation. Separate the activated sludge in the mixed liquor from the treated wastewater. Return activated sludge is returned to the aeration tanks and waste activated sludge is transferred to the solids handling facilities.
CityWI
Aug 11, 2026
Closes
Sep 2, 2026
Project involves upgrading of the aeration system which includes but is not limited to replacement of aeration equipment, refurbishment of aerator weather hoods, and cleaning of oxidation ditch channels.
CountyMD
Aug 5, 2026
Closes
Sep 16, 2026
Harford County's Department of Public Works—Water and Sewer is soliciting bids for removal and replacement of the existing Soda Ash System processing equipment and associated loop piping at the Abingdon Water Treatment Plant. The open IFB was posted on August 5, 2026, and bids are due September 16, 2026, at 1:00 PM EDT. This is a local government construction procurement for a water-treatment upgrade, not a grant program.
CityGA
Aug 10, 2026
Closes
Sep 17, 2026
The City of Social Circle, Georgia is seeking contractors for significant upgrades to its Little River Water Pollution Control Plant and sewerage system. Contract 1 covers approximately 3,600 linear feet of DIP and PVC sewer with manholes, jack-and-bore work, rock excavation, clearing, and erosion and sediment controls, while Contract 2 covers new treatment-process and support facilities including aeration basins, clarifiers, tertiary filters, ultraviolet disinfection, pumping, chemical feed, control, digestion, and sludge-dewatering facilities. The Georgia Procurement Registry identifies this as a construction/public-works procurement rather than a grant, requiring a State of Georgia Utility Contractor License and a state Utility Manager certificate holder, with listed completion periods of 270, 480, and 540 days.
Procurement and program contacts connected to San Francisco Public Utilities Commission.
