53-2025 - Water Resource Recovery Facility Secondary Clarifier 1 & 3 Rehabilitation

The city owns and operates the WRRF, which is rated for a maximum month flow of 25 MGD of wastewater. The facility treats an annual average of approximately 12 MGD from its service area. The WRRF began operations in 1968, and the capacity and complexity of its treatment process has evolved based on growth and water quality regulation progression.

The WRRF’s current wastewater treatment process uses four (4) secondary clarifiers to separate secondary solids and scum from clean secondary effluent. Three (3) of these were originally constructed and put into service circa 1987. These original clarifiers used mechanisms manufactured by Hydro Systems, Inc. Replacement of the second unit (SC2) was completed in 2024. The fourth secondary clarifier (SC4) was constructed in 2007, and it is not part of the scope of this project. The remaining two units, SC1 and SC3, are at the end of their useful life and in need of replacement.