Plant Expansion Project Now Complete

The City of Oconomowoc Wastewater Treatment Facility has recently undergone a $7.2 million dollar expansion project. Funds for this project had been collected since 1991 and deposited into a designated reserve fund. The scope of the project is as follows:
Added one Secondary Clarifier providing reliable redundancy to these process steps increasing the capacity of secondary settling to 5.5 million gallons per day (MGD) average, and 12 MGD Peak Flow.
Replaced the present chlorine based disinfection system with ultraviolet disinfection providing better control of the disinfection process. This increased the capacity of this process step to 5.5 MGD average and 12 MGD Peak Flow.
Added biosolids storage (1.1 million gallon tank) providing reliable redundancy to this process step and increasing biosolids capacity to serve 5.5 MGD average flow. This additional tank adds flexibility during poor weather conditions when agricultural application is not possible.
Replaced 35 year old main transformer and switchgear serving the plant providing increased reliability.
Added containment basins for chemical delivery and sewer maintenance residuals.
Upgraded SCADA system for biosolids management.
Additional Project Photographs