Gresham Smith and Shook Construction Selected for Progressive Design-Build Combined Sewer Overflow Storage Basin Project

New System Will Help Limit Downtown Sewer Overflow Events and Support Future Development

The design build team of Gresham Smith and Shook Construction are excited to announce it has been selected to design and construct a new buried combined sewer overflow (CSO) storage basin in Middletown, Ohio.

The new storage basin will help limit combined sewer overflows into the Great Miami River during periods of wet weather, supporting the city in their goal of adhering to the highest environmental standards set by the U.S. Environmental Protection Agency and Ohio Environmental Protection Agency.

Connecting to two major trunk sewers, the system will be able to store 5.1 million gallons of combined sewer flow. Gresham Smith will provide planning and modeling services to evaluate storage basin configurations that feature influent screening, odor control and remote automation before designing the optimal solution.  Once the buried CSO Storage basin design is complete, the firm will provide landscape architecture, construction administration and start-up services, working with Middletown stakeholders to develop a community asset. Shook Construction will provide cost estimating, scheduling and constructability reviews throughout design process and lead the construction of all above and below ground infrastructure.

“Mitigating combined sewer overflows is a crucial part of protecting the Great Miami River and managing wet weather flows to Middletown’s wastewater treatment plant,” said Water + Environment Project Executive Saa Shemsu, E.I., Assoc. DBIA. “Our team is excited the city selected Progressive Design Build as a project delivery method, and looks forward to successful collaboration with our client, project partners and an excellent contractor in Shook. Combining our water engineering expertise with our landscape architecture practice’s experience in community-based design, and Shook Construction’s collaborative approach to project delivery, our firms will help the City of Middletown re-imagine this site to support future downtown development for many years to come.”

Design on the new system will begin in July 2022. Construction will start in May 2023.