Manhole Rehabilitation

St. Paul Interceptor

St. Paul Interceptor

Scope

Michels, one of North America's largest pipe rehabilitation contractors,Ā  restored more than a mile of sanitary sewer pipes on the St. Paul Interceptor. The project included 670 lineal feet of 56-inch, 4,418 lineal feet of 60-inch and 2,250 lineal feet of 72-inch diameter pipes.

Crews used cured-in-place pipe (CIPP) liners made of 5-8 layers of felt inside corrosion-resistant coated liners impregnated with resin. The liners were cured in place with hot water, with the exception of one installation. The 90-foot installation of 72-inch pipe had a 13 foot elevation change and was cured with steam.

Installing liners between 25 to 50 feet below ground was challenging. For example, when the 72-inch liner was filled with resin, it weighed nearly 200 pounds per foot. As a result, the crew added a special hydraulic brake to the roller setup to control the speed at which is was lowered into the manhole. In addition, one 90-foot section had a 13-percent grade change, far more than the typical 0.5 - 3 percent.

The second phase of the project had an extremely deteriorated pipe, a condition that was not known to the owner. The CIPP liner had to be re-sized and re-designed for the actual pipe conditions.

The project was completed in 12 installations ranging from 90 feet to 1,480 feet over the course of 4 months in November 2018 to February 2019. A 2,400-foot second phase was completed the following September and October.

  • Michels restored more than a mile of sanitary sewer pipes on the St. Paul Interceptor.
  • The project included 670 lineal feet of 56-inch, 4,418 lineal feet of 60-inch and 2,250 lineal feet of 72-inch diameter pipes.
  • Crews used CIPP liners made of 5-8 layers of felt inside corrosion-resistant coated liners impregnated with resin.
  • The project was completed in 12 installations ranging from 90 feet to 1,480 feet over the course of 4 months.

Projects

Michels installs a 39-inch cured-in-place pipe (CIPP) liner to rehabilitate a sewer line.

Cured-In-Place Pipe (CIPP)

1-MN-341 Interceptor Rehabilitation

Minnesota

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1-MN-341 Interceptor Rehabilitation

Michels performed a pipe rehabilitation repair of a sewer main that had ruptured in multiple locations.

Cured-In-Place Pipe (CIPP)

River Ave Force Main Rehabilitation

Connecticut

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River Ave Force Main Rehabilitation

Michels utilized ultraviolet light (UV) cured-in-place (CIPP) pipe liners to rehabilitate nearly 45,000 linear feet of sanitary sewer pipes and 138 manholes in Guam, making it among the largest UV projects in the United States.

Cured-In-Place Pipe (CIPP)

Northern Interceptor Sewer Rehab

Guam

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Northern Interceptor Sewer Rehab

Individual commitment to a group effort - that is what makes a team work, a company work, a society work, a civilization work.

Vince Lombardi

Great teamwork can do great things.

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