The Grand Island Wastewater Treatment Plant currently employs three (3) final clarifiers to settle solids out of wastewater using gravity.  The Final Clarifiers are rehabilitated on a fifteen (15) year schedule, with each of the three (3) clarifiers being rehabilitated over the course of three (3) years.  The rehabilitation involves the replacement of certain sensitive components of the clarifier while others are merely sanded down then repainted.  This maintenance ensures the reliability of this critical infrastructure given the corrosive nature of the environment in which the clarifiers operate. 

On March 23, 2021, via Resolution No. 2021-64, City Council approved the bid of Ovivo USA, LLC of Salt Lake City, Utah in the amount of $185,783.00 for Furnishing Components for "EIMCO® Type C3D-Full Trough Skimmer Clarifier Mechanism; Project No. 2021-WWTP-1.

On August 10, 2021, via Resolution No. 2021-196, City Council approved Change Order No. 1 with Ovivo USA, LLC, at no additional cost,  to extend the completion date of the project from August 16, 2021 to June 1, 2022.

On May 25, 2021, via Resolution No. 2021-118, City Council approved the contract with Fab Tech Wastewater Solutions, LLC of O'Fallon, Missouri, in the amount of $192,000.00, for Final Clarifier No. 1 Renovation; Project No. 2021-WWTP-3.

On August 10, 2022, via Resolution No. 2021-197, City Council approved Change Order No. 1 with Fab Tech Wastewater Solutions, LLC, at no additional cost, to provide additional time for completion of the project.  The substantial completion date was extended from September 16, 2022 to November 1, 2022; with the final completion date extended from September 30, 2022 to November 15, 2022.

On October 25, 2022, via Resolution No. 2022-306, City Council approved Change Order No. 2 with Fab Tech Wastewater Solutions, LLC, in the amount of $13,310.00, to allow for replacement of the plow blades at the bottom of the clarifier, as the existing blades were found to be badly corroded; as well as installation of a new stainless steel diversion gate due to the existing aluminum gate failing due to corrosion.