The Coal Pile Run-off (CPRO) Treatment System at the Avon Lake Power Plant was originally installed at the plant in the early 1980’s. Over the course of the operating life of the system a number of issues resulted in a decrease in the system’s capacity.

As part of the plants new National Pollution Discharge Elimination System (NPDES) permit requirements, the runoff water collection basin is required to hold the design year storm without overflow and the stormwater collection basin and the stormwater runoff wastewaters are to be separated from the air heater wash waters.

A runoff volume study was performed for the design storm condition. From this study, it was established that the design storm requirements could be met through storage in the power plant and increased treatment facility thruput.

A review of the treatment system equipment and operation followed. A report with suggested modifications and budget pricing was prepared for approval. Following owner’s review, R.E. Warner provided the design engineering to upgrade the treatment system including a new clarifier, refurbishing the existing thickener, modification of the collection basin pumps and distribution piping modifications to allow transfer of the stormwater and isolation of the stormwater and the air heater wash water.

The Permit to Install (PTI) application and plans were prepared, submitted to the Ohio Environmental Protection Agency (OEPA) and approved. Due to uncertainties in the future operational status of the power plant, a reduced scope of upgrade was installed.


• Runoff volume study
• Treatment plant equipment review
• Treatment plant and distribution system upgrade
• Permit application preparation