Township sewers to undergo 10-year rehab process

By: Nick Mordowanec | Fraser - Clinton Township Chronicle | Published April 27, 2016

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CLINTON TOWNSHIP — Clinton Township is starting from the beginning and working its way up.

The township is delving into its sewers, analyzing different needs and concerns in 10 different zones throughout the area. Public Services Director Mary Bednar described it as a 10-year process.

The first zone is Zone 6, which encompasses Clinton River Road to the north, Metropolitan Parkway to the south, Garfield Road to the west, and Groesbeck Highway to the east.

Bednar said the township first looked at whether pipes were adequate or not. A decision was then made to determine whether pipes needed repair through new lining to bring them back up to speed.

“We’ve initiated a township byproduct over the next 10 years to look at all sewer pipes in the township, and this was the first area we looked at,” Bednar said.

Repairing existing township pipelines involves the use of a cured in place pipe, or CIPP.

“CIPP liners are constructed of a tubular layer of nonwoven polyester felt with an exterior polyurethane coating,” said Scott Chabot, senior project manager for the township’s engineering firm, Giffels Webster. “A resin mixture is added to the felt during a process called wet-out. At the site, the CIPP liner is positioned within the pipe and inverted.

“The CIPP liner is inflated to press the liner against the pipe wall, then hot water is circulated within the liner to allow the outer resin to cure. After curing, the liner is slowly cooled to prevent shrinkage.”

Bednar said the process offers the same integrity without digging. Putting plastic liner inside the pipe offers different ways for the pipe to adhere.

She said that each zone’s pipe will have a shelf life of around 50 years.

“It’s basically a brand new pipe without doing open-cut standard construction we used to do,” she said.

At the April 11 Board of Trustees meeting, Chabot explained that the pipes will help reduce inflow. Reinforcing the pipes is a more current process.

“It will help with conveyance,” Chabot said at the meeting.

Supervisor Bob Cannon said the CIPP plan saves the township money in the long run.

On April 7, the township received and processed five total bids for the CIPP project. The lowest bidder for Zone 6 was Corby Energy Services Inc., with a total bid of $290,780. Chabot said the company is located in Belleville.

Bid results were reviewed by the township’s Public Services Department.

A condition of the bid requirements was that prospective bidders were required to be prequalified for CIPP in sanitary sewers, along with sanitary sewer cleaning and televising.

When engineering-related fees and construction contingency are factored, the total amount of the project is an estimated $337,304.

The board unanimously voted to move forward with the project.