City of Columbus

Markison Inflow Redirection

This project is a Consent Order project as identified in the Integrated Plan and 2015 WWMP Update Report needed to mitigate Combined Sewer Overflow (CSO) at the Markison CSO Regulator to a Typical Year Level of Service. This project will also mitigate potential water-in-basement occurrences in the Markison combined sewer basin up to the 10-year Level of Service.

This project involves intercepting storm runoff from the existing combined sewer system to the new storm sewer system and improvements to the Markison Avenue CSO Regulator to increase capture.

The project area is generally bounded by: Smith Road on South, 22nd Street on West, Lockbourne Road on East and Whittier Street on North. View the project area map.

To meet Consent Order deadline this project will be operational by July 1, 2025.

Financing for this project is being provided by a below-market rate loan obtained through the OEPA’s Water Pollution Control Loan Fund (WPCLF) and the debt is being serviced through the City of Columbus sanitary sewer user fees.

Questions regarding this project should be directed to Gregory R. Barden, P.E. at 614-645-1953 or email [email protected].