ST. MARY’S GARDEN SUBDIVISION FLOODING IMPROVEMENTS
In 2015, the City of Monroe contacted Spicer Group to evaluate the storm sewer system due to ongoing flooding concerns within the St. Mary’s Gardens Subdivision. The study concluded that the flooding was a result of inadequately sized storm sewers, flat terrain, and limited available grade. In 2021, the City asked Spicer Group to design a new stormwater system. A key feature of the design was the underground stormwater pump station, essential for removing excess water from areas that couldn’t drain by gravity under the old system. This station features two 14-foot-diameter wet wells, each equipped with two pumps running at a rate of 6,000 gallons per minute, designed to handle a 10-year design storm. Additionally, a 27-inch-diameter overflow pipe was installed for relief during storms exceeding the 10-year capacity.
To further improve drainage, approximately 5,000 lineal feet of new reinforced concrete pipe ranging in size from 12-inch to 42-inch diameters were installed beneath the neighborhood roads, and 7,000 lineal feet of 8-inch plastic header tiles were installed to connect yard drain basins to the new storm sewer. The yard basins provided every house with a designated outlet for direct connection to the new system, ensuring proper sump and sub-slab water removal. Construction began in 2023 and finished in 2025. The total project construction cost was $6.6 million, with funding support from the American Rescue Plan Act.
PROJECT INFORMATION
Location
Monroe, MI
Spicer Group Project Contact
Jonathan Witham, PE
269-254-2144
PROJECT PICTURES
