New Southwest Water Resource Recovery Facility, Contract 1-2026, City of Oskaloosa, Iowa RFP

Description: Replacement of the existing activated sludge southwest wastewater treatment facility (SW WWTF with a higher capacity southwest water resource recovery facility (SW WWTF) with biological nutrient removal. Improvements include existing excess flow return pumping station (structure 08) upgrades; construction of a headworks building with screening and grit removal equipment (structure 10), two oxidation ditches (structure 20), three final clarifiers (structure 30) and UV disinfection (structure 40). The project also includes construction of two aerobic digesters (structure 50), a biosolids building with ras/was pumping and two centrifuges for dewatering (structure 60), a dewatered biosolids storage building (structure 70), an administration building and garage (structure 80), a hauled waste receiving station (structure 87), a vactor truck debris pad (structure 88), electrical power and standby generator, sitework improvements, and miscellaneous associated work. New supervisory controls and data acquisition (SCADA) and security will also be included in the project. Additionally, the project includes minor improvements at the northeast WWTP, including miscellaneous architectural, structural, HVAC, and electrical improvements.