Renovation of a water / sewer project in Granite Falls, Washington. Completed plans call for the renovation of a water / sewer project.

This project will construct upgrades to the existing City of Granite Falls Wastewater Treatment Facility. The project includes the construction of a new 14-inch influent gravity sewer, replacement of a section of 8-inch gravity sewer with a 12-inch gravity sewer, a new headworks facility, a new influent pump station and force main, two new oxidation ditches with selector zones, a new blower building containing new aeration blowers for the oxidation ditches and aerobic digesters and motor control centers, a new effluent flow meter, and a new odor control system. The project also includes modifications to the two existing secondary clarifiers including the replacement of the existing return activated and waste activated sludge pumps, modifications to the existing bioselector and secondary clarifier splitter box structure, modifications to the existing alkalinity control structure including the demolition of the existing alkalinity control system and the installation of new effluent evaporative cooling towers, and modifications to the existing effluent disinfection structure that will include demolition of the existing UV disinfection system, installation of a new UV disinfection system, and the installation of a new effluent filtration system including flash mix and flocculation tanks and installation of approximately 110 feet of a new 16-inch effluent pipeline and other effluent pipeline modifications. Other project elements will include the conversion of the existing oxidation ditch into two aerobic digesters, and the conversion of the existing aerobic sludge holding tank into the new stormwater, non-potable water and cooling tower/effluent filter feed pump stations. The project will also include modifications to the existing plant drain pump station including the installation of new Owner-supplied submersible pumps and pump control system. In addition, the existing Solids Handling Building and compost and amendment storage bays will be demolished, and a new Solids Handling Building housing chemical storage and metering systems, biosolids thickening and dewatering equipment and a haul truck loading bay will be constructed. Temporary waste activated sludge storage, hauling, and disposal will also be the responsibility of the Contractor for a significant duration during this project. The existing Operations Building will also be modified and a new Administration Building and Storage Building will be constructed. Finally, the existing power distribution system will be almost entirely replaced with a new dual bus system. The Work shall be substantially complete within 430 working days All Proposals must be accompanied by a certified check, postal money order, cashiers check, or Proposal bond payable to the “City of Granite Falls” and in an amount of not less than five percent (5%) of the total Proposal amount. Engineer’s estimate $27,000,000 to $29,000,000 *The value for this project is based on a financial range. The value is listed as the highest possible cost from the range provided by a stakeholder or official project document.