Portland Wharf CSO Basin

Basins are a key part of achieving safe, clean waterways

Rainwater can enter the sewer system during rain events and cause a mixture of sewage and rainwater to flow untreated into our waterways. Proposed and existing storage basins—throughout our city—are designed to retain the mixture of rainwater and sewage until the rain subsides, and then gradually release it back into the sewer system for treatment.

Portland CSO Basin

The covered underground Portland CSO Basin will offer the Ohio River protection from combined sewer overflows. Input from the neighbors—at public meetings and online—helped determine the specific details and aesthetics of the finished project.