When Alaska Pipeline Company - a wholly owned subsidiary of SEMCO Energy, sister company of ENSTAR Natural Gas, the gas distribution supplier to south-central Alaska - needed to relocate a section of the Beluga Natural Gas Pipeline Transmission system crossing the Susitna River, its managers knew the project presented special challenges. Following the summer seasonal flow on the Big Susitna River, inspection showed a significant bank loss on the eastern channel, The river crossing was in danger due to a pending pipeline exposure. The 20-inch diameter Beluga gas transmission pipeline transports 50% of the natural gas used in Alaska's Cook Inlet. Immediate action was necessary to replace the pipeline during the upcoming winter construction season.
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