Bowater Pulp and Paper Mill
Cured in Place Pipe Rehabilitation
Thunder Bay Ontario.

The Bowater Pulp and Paper mill located in Thunder Bay, Ontario not only supplies most of North America with their recycled paper products but also exports to Japan and Korea. In September 2001, the primary clarifier used for preliminary effluent treatment for mill operations was shut down, drained and readied for repairs and maintenance. The project’s scope involved the cured in place rehabilitation of three of the feeder and circulation lines attached to the clarifier. The lines—1200mm, 750mm and 250mm dia.—all ran under the clarifier rendering them difficult to access to say the least.

One of the most unique installations of the three involved the removal of a portion of the exterior wall from one of the adjoining pump stations to allow access to the pipe length.
The second involved the installation of a 1200mm dia. tube that could only be reached through an access excavation on the far side of the clarifier. In all, the entire rehabilitation was completed in 5 days, half the time allowed for the project.