Tucker Boulevard Replacement

Client: HDR, Inc.
Owner: Metropolitan St. Louis Sewer District
Year: 2013

M3 Engineering staff was hired by HDR Inc. to help complete the design for the replacement of 4,000 feet of Tucker Boulevard in the northern part of downtown St. Louis. The project included the use of 300,000 CY of earth fill and 50,000 CY of Expanded Polystyrene (EPS) fill. The project also included the separation of combined sewers, storm sewer design, tunnel rehabilitation, utility relocation, commercial building modifications, archeological and hazardous material investigation and use of rain gardens along the length of the project. M3 staff modeled the enclosed sewer systems with XP-SWMM, designed the storm piping, 11 curb cut rain gardens and two 20,000 square foot bioretention cells intended to reduce stormwater runoff and improve water quality.

A 7 ½' to 10' horseshoe trunk sewer discharges into a drop shaft (O'Fallon) which discharges combined sewer flow (storm and sanitary) into the Mississippi River. In order to reduce Combined Sewer Overflows, MSD directed the City to convert the tunnel to a storm only sewer. Improvements to the existing system included intercepting dry weather flow in a new sanitary sewer, redirecting part of the 7 ½ foot horseshoe sewer into Mill Creek Watershed with a new interceptor diversion, adding drop shafts to the tunnel and eliminating the Biddle Pump Station.

Projects - Transportation