Idaho Power Co. has filed an integrated resource plan (IRP) with Idaho and Oregon regulators calling for a near-doubling of its natural gas-fired generation with the completion next year of a third plant. The utility’s 300 MW combined-cycle gas-fired Langley Gulch generation plant is set to open in June 2012. The plant was identified as needed in Idaho Power’s 2009 IRP. Two existing gas-fired plants provide 345 MW of nameplate capacity collectively. Part of the new plant’s development includes construction of a connecting gas transmission pipeline and a 230-kV electric transmission line and substation. Idaho Power said in addition to boosting its power supply portfolio, Langley Gulch is expected to help the utility integrate ever-larger amounts of wind-powered generation into its system. The gas-fired generation is expected to be increased and decreased quickly in response to the intermittent wind supplies.

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