Innovative anti-microbial product for a challenging concrete pipe installation

CPI - Concrete Plant International - 01/2010

The Metropolitan St. Louis Sewer District (MSD) faced a problem familiar to many big city wastewater departments managing underground assets. A large (72-inch) sanitary sewer needed to be replaced with an even larger line to handle wet weather flows and eliminate sanitary sewer overflows (SSOs). In the years since initial installation, the above-ground area had become heavily developed. “We’re handling the Coldwater Creek project in three phases,” explains MSD Principal Engineer Greg Tolcou, P.E., “and this phase is the shortest. It is a 2,300-foot stretch that passes (at an average depth of 20-25 feet to flow line) under Lindbergh Boulevard. It also passes under a 20-inch gas line, a 24-inch water main, a condominium complex lake, the parking lot and the improvements for a driving range. The projected cost to restore surface disruptions is getting so high on these kinds of projects that tunneling is becoming more and more cost effective.”

Click to read Complete Article (PDF)


  • AP/M Permaform
    PO Box 555
    Johnston, IA  50131


  • 515.276.9610
    800.662.6465 Toll Free 515.276.1274 Fax

Copyright ©2019 by AP/M Permaform

  • White Facebook Icon
  • LinkedIn
  • White Twitter Icon
  • White Instagram Icon