Project Overview

The project supports ODOT’s Brent Spence Bridge Corridor reconstruction project by creating new stormwater conveyance infrastructure along Gest Street and modifying the McLean Avenue Sewer. The project will divert stormwater runoff from I-75 and reduce combined sewer overflows (CSOs) into Mill Creek, while laying the foundation for future high-rate treatment at the Mill Creek WWTP.

The project is adhering to an accelerated schedule to accommodate the requirements of the ongoing ODOT improvements. The project will be bid in two separate construction projects. Key components of the project include:

• Tunneled Storm Sewer: Approximately 2,200 LF of 108-inch-diameter tunnel with launch shaft at Gest/Freeman interchange. Designed for 50-yr, 24-hr storm conditions.
• Receiving Shaft: Large shaft on Norfolk Southern property for TBM retrieval and junction chamber construction; includes secant piles, excavation support, and road modifications.
• CSO Diversions (430 & 431): Removal of outdated structures and construction of a dynamic underflow control connection to EBORI, reducing CSO volumes (~139.8 MG) and sending more flow (~106.5 MGD, 87 MG/year) to planned Mill Creek WWTP HRT.
• CSO Separations (432 & 489): ~4,625 LF of new storm sewer and ~189 LF sanitary separation, eliminating CSOs 432/489 and reducing ~2.6 MG/year of overflow.

The project is adhering to an accelerated schedule to accommodate the requirements of the ongoing ODOT improvements.