Tri-State Generation and Transmission Re-Circ Pipe Repairs

Project Description
Craig, Colorado – Work completed during the two-week shutdown included electromagnetic testing to identify repair locations, repair design, carbon fiber composite strengthening of 3 eighteen-foot length sections of pipe and external post-tensioned strengthening of 1 eighteen-foot length section of pipe. The external post-tensioned section included excavation, installation and stressing of 53 strands and application of wet mix shotcrete exterior shell. The carbon fiber strengthening project included surface preparation and installation of the composite.


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