ST. LOUIS, MO, March 10, 2015 -- SAK Construction, LLC, (SAK), a provider of trenchless technology and tunneling solutions, has begun work on a $9.2-million contract to rehabilitate 5,575 linear feet of aging combined sewer in downtown St. Louis, Mo.
The project, which targets a major segment of the brick-and-limestone Old Mill Creek Sewer, is jointly funded by the U.S. Army Corps of Engineers and the Metropolitan Sewer District of St. Louis (MSD). Rehabilitation of the sewer, which was built in the 1860s, is part of a comprehensive plan that MSD is implementing to improve the St. Louis wastewater system.
According to Mike Badgley, SAK project manager, the contract includes renovating the 18-foot-high by 20-foot-wide arch-shaped sewer, 15 manholes and 58 lateral connections using chemical grout, concrete and shotcrete (a specialized spray-on wet or dry concrete solution that hardens in place, forming a structurally renewed surface). To complete the work, an estimated 3,200 cubic yards of concrete, 4,500 cubic yards of shotcrete and 400 tons of reinforced steel will be required.
Among the unusual challenges posed by the project is the sewer's significant average dry weather flow of 50 million gallons per day. "A combined sewer carries both sanitary and storm water. This means that heavy rainfall or a high river stage, in addition to the normal dry weather flow, can restrict working conditions within the sewer," said Mike Badgley, SAK project manager. To minimize potential issues and progress on schedule, SAK regulates the dry weather flow by using a combination of bypasses and flow diversions.
See also:
"SAK Construction begins new $17.3M wastewater pipeline rehabilitation for Baltimore"
"DC Water's $2.9M wastewater pipeline rehab contract nears completion"
About SAK Construction
Based in O'Fallon, Mo., and with additional regional offices in Sacramento, Calif., and Nashville, Tenn., SAK is active across the U.S. The company solves the challenge of maintaining and restoring aging water and sanitary infrastructure for the municipal, energy and industrial markets. With industry leading experience and a commitment to service excellence, SAK is a trusted partner helping customers worldwide renew, protect and expand their pipeline infrastructure. For more information, visit www.sakcon.com.
###
