CIPP Project Requires Complex, Challenging Bypass Pumping Plan

By Jeff Griffin, Senior Editor | July 2013, Vol. 68, No. 7

“As a result,” Gould said, “the creek was used for only 30 percent of the project which greatly reduced liability, but it came with extensive traffic control and an unavoidable road cut. The impact, however, was reduced on the residential streets by running the discharge down the center and utilizing traffic control with detours and one way traffic to avoid multiple driveway cuts.”

Gould said the bypass system ran flawlessly for eight weeks with Sunbelt performing pump watch with a fully stocked service vehicle 24 hours a day, seven days a week.

“The technician was responsible for monitoring, servicing and fueling the pumps,” he said. “In addition, the technician was responsible for monitoring the air pressure in the pneumatic plugs blocking the 72-inch sewer line. Due to the large diameter of the sewer, the plugs have a limited amount of allowable back pressure so the surcharge levels in the sewer were closely monitored by the readings from the pumps transducers.”

Despite unexpected challenges, CIPP lining was completed ahead of schedule. Bypass breakdown took only about a third of the setup time. However, Gould said it was not done all at once, but was carefully planned to allow for load-out of pipe to be shipped to other bypass projects across the southeast to avoid handling the pipe more than once.

“The success of the project is the result of combined efforts of a strong team, including the design engineer, CH2MHill, prime contractor Layne Inliner and Baird Contracting, a Layne subcontractor,” concluded Gould.

Based in Fort Mill, SC, Sunbelt Rentals is a wholly-owned subsidiary of Ashtead Group and operates more than 400 rental locations throughout the United States serving the needs of a wide variety of customers ranging from utility, commercial, residential, municipal, specialized service industries and do-it-yourself customers. Sunbelt identified itself as the second largest equipment rental company in the U.S.


Layne Inliner Technologies, (812) 723-0704,
CH2M Hill Area Office, (205) 326-8912,
Sunbelt Rentals, (800) 667-9328,
McElroy Manufacturing, (918) 836-8611,

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