Within the Deer Creek Watershed in the City of Frontenac, stormwater enters and overloads the sanitary sewer system causing water backups in basements, yards and streets during heavy rains. The Metropolitan St. Louis Sewer District enlisted Oates Associates to investigate / identify potential infiltration sources and prepare plans to remove this flow from the system to alleviate sanitary sewer surcharges and overflows.
Oates Associates is performing private inflow and infiltration (I/I) reduction evaluations and field investigations on approximately 60 properties- identifying improper sanitary sewer connections. Examples of storm connections to the sanitary sewer include roof downspouts, driveway drains, area drains, sump pumps, and broken or vented clean outs.
Oates will design improvements to reduce storm water flow into the sanitary sewers. The scope consists of rehabilitating approximately 900 feet of 8 to 36-inch diameter storm sewers and 143 manholes.