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CX-001944: Categorical Exclusion Determination

Replace Spacer Dampers Along the Grizzly - Captain Jack No. 1 500 Kilovolt Transmission Line
CX(s) Applied: B1.3
Date: 04/21/2010
Location(s): Crook County, Oregon
Office(s): Bonneville Power Administration

In order to provide continued system reliability, Bonneville Power Administration (BPA) proposes to replace old and worn spacer dampers along approximately 113.1 miles of Grizzly - Captain Jack No. 1 500 kilovolt transmission line. Manned aerial carts that ride on the transmission line conductors will be used to change out the spacers. The carts will be placed on the transmission line by a helicopter before the line crews access the carts to perform the work. New spacers will be flown to the carts and delivered by helicopter. Once the old spacers are changed, they will be picked up by helicopter and transported to a pickup area before being sent to a recycling center. The majority of the work will be above ground with minimal support from vehicles and crews on the ground. All vehicles will remain on existing access roads. All work will be in accordance with the National Electrical Safety Code and BPA standards.