Bid Schedule

Tunnel Bid Schedule

The Metropolitan St. Louis Sewer District (MSD) manages the fourth largest sewer collection system in the United States. It has begun an ambitious program called Project Clear that will span a generation. This program is a multi-billion dollar investment addressing wastewater overflows with building community rainscaping, system improvements, and a program of maintenance and repair throughout the system serving St. Louis region. The system improvements include construction of several tunnels to control sewer overflows.

The following map details the locations of major tunnel projects. Each tunnel is represented with a different color key. Using your mouse, click on each tunnel for a pop-up window to appear. The new window provides a chance to zoom in on that tunnel area and in many cases you will find an informative fact sheet.

As part of the overall program, construction may also include new sewer lines to convey wastewater, above-ground storage tanks to store stormwater, or deep underground tunnels to both store and convey additional flow during heavy rain events until capacity is available at the respective treatment plant.

“These tunnels represent significant work opportunities for the construction industry,” said MSD Executive Director Brian Hoelscher. “We want the construction industry to be aware of these opportunities and plan accordingly,” Hoelscher stated. All prospective bidders must be prequalified and certified prior to advertisement of these projects. Prequalification is based on past project experience, performance, and financial strength. If you have questions regarding the prequalification process for these projects, please contact Allen Muehlher P.E., Assistant Director of Engineering, at (314) 768-6239 or Kent Kotthoff P.E., Program Manager, at (314) 768-2797.

The following table outlines the key components of each tunnel. The schedule and cost presented is tentative as determined by current planning efforts, and subject to program implementation and final budget approval.

* Design is underway.
** Dates are estimated and shown in MSD Fiscal Years which start on July 1.

If you have specific project-related questions on the above projects, please contact Bob Wibbenmeyer at or (314) 768-6260.