The fourth largest sewer utility in the United States, Metropolitan St. Louis Sewer District (MSD) is currently under a Consent Decree with the U.S. Environmental Protection Agency and the Missouri Coalition for the Environment to control sanitary sewer overflows (SSOs) within the Deer Creek Watershed. In response, MSD is directing the design and construction of the Deer Creek Sanitary Tunnel and the Deer Creek Pump Station as part of system improvements for the 23-year, $4.7 billion Project Clear program.
Gresham Smith was selected to design the $39.2 million deep pump station, which will comprise a wet well, an influent sump, and two dry wells and a screening structure to be located in three separate 36-foot-diameter vertical shafts, approximately 185 feet belowground. The pumping and screening facilities will receive flow from the Deer Creek Sanitary Tunnel currently under construction.
mgd pump station
million gallon deep-rock tunnel
36-foot-diameter vertical shafts