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Transmission line plans go to public hearing in Rigby

PacifiCorp, the parent company of Rocky Mountain Power, is proposing to build a new 161 kilovolt transmission power line through Jefferson County.

The utility has filed for a conditional use permit with the Jefferson County Planning and Zoning Commission.

The transmission line would begin at the Bonneville/Jefferson County line on the Lewisville Highway and run north to 400 North, then east on 400 North to to the PacifiCorp substation in the city of Rigby. The line would then extend east across Highway 20 and north to the Madison/Jefferson County line.

The transmission line is part of a multi-stage upgrade of the utility’s system between Goshen substation near Firth and the Rexburg substation. The Rigby substation will also be upgraded to receive 161 kilovolt transmission line.

Construction of a new Sugarmill substation between Idaho Falls and Ucon is scheduled to begin in 2019, with the Rigby substation to follow in 2020-2021 and Rexburg substation in 2021.

PacifiCorp says the line should improve capacity and reliability to the area.

A public hearing to discuss the Jefferson County transmission line proposal is scheduled for 6 p.m. Thursday, November 1 in the County Commission Chambers in the Jefferson County Courthouse in Rigby.

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