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® pipe and fusion services for the Hiland Road Water Transmission Main - Phase 3 Project in Anchorage, AK." />
In May 2010, Underground Solutions (UGSI) contracted with North Star Paving & Construction, Inc. of Soldotna, AK to supply 24" Fusible C-905® pipe and fusion services for the Hiland Road Water Transmission Main - Phase 3 Project in Anchorage, AK.
The Hiland Road water transmission main provides a redundant supply of water to Eagle River, Alaska. The project alignment was designed to cross beneath the Glenn Highway (the busiest highway in the State of Alaska) using 24" Ductile Iron Pipe (DIP) within a 460 LF 36" steel casing. The contractor's initial attempt to install the steel casing failed, limiting the diameter of the casing to a maximum of 30". As a result, the 24" DIP would no longer fit in the casing due to the bell OD.
AWWU needed to maintain the hydraulic capacity of the 24" DIP and turned to 24" Fusible C-905® pipe due to its low profile fused joint which maintains a near consistent OD across the fusion joint and pipe barrel.
Mark Corsentino (P.E.), Engineer with AWWU, commented: "HDPE and Fusible PVC® pipe were both considered for the slipline. The required pressure rating for the pipe was approximately 200 psi, so 24" HDPE would have provided a much smaller ID and would not have met our hydraulic requirements to the same extent as Fusible PVC® pipe. Additionally, HDPE pipe would have required special-order fittings to be welded onto the pipe to connect to the 24" DIP, while Fusible PVC™ pipe was able to connect directly to the 24" DIP using standard mechanical fittings. This was important, as it allowed the contractor to readily make field adjustments to the DIP tie-in connections."
Corsentino also added: "UGSI personnel were extremely knowledgeable and provided valuable input to come up with solutions for the many constraints on the project. They were extremely efficient, timely, and hard working."
For additional project information or AWWU contact references, please contact Cal Ogle.