Horner & Shifrin Receives ACEC/MO’s Grand Conceptor
Award for Lower Meramec Lift Station Project

Horner & Shifrin, Inc., has received the Grand Conceptor Award from the American Council of Engineering Companies of Missouri (ACEC/MO) for its design of the 202.5 million gallons per day (MGD) Lower Meramec Lift Station for the Metropolitan St. Louis Sewer District (MSD). This is the most prestigious statewide award presented annually by ACEC/MO. Horner & Shifrin managed the entire project, developed the overall design concept for this unique lift station, and performed detailed civil, process, structural, mechanical and electrical design services on the project.

This lift station, one of the largest and deepest in the St. Louis area, is approximately 100 feet in diameter and 226 feet below grade. It receives flow from a 96-inch diameter deep tunnel system that currently serves about one-third of MSD’s Lower Meramec River Service Area, and then conveys wastewater into a new treatment plant located at the confluence of the Meramec and Mississippi Rivers. A separate screen structure, located approximately 100 feet “upstream” of the lift station, provides protection for the pumps from damage that could result from debris traveling down the 96-inch-diameter interceptor tunnel. The Screen Building houses the screen cleaning mechanisms, screenings dumpsters, and a bridge crane. The screen structure ventilation system is equipped with a state-of-the-art biofilter to treat the odorous/corrosive airflow from this screen structure. The entire facility is designed to allow remote operation by MSD staff via a distributed control system.      

 “We worked closely with MSD and their construction manager to design a technically sound, cost-effective lift station that met budget goals while maintaining the schedule faced by MSD,” said Horner & Shifrin Project Manager James McCleish. “Large lift stations that are connected to deep tunnels are key sources of odor emissions. To minimize the effect on the surrounding residential area, the Horner & Shifrin team designed a state-of-the art inorganic media biofilter to treat air emissions from the screen structure.”

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