CX-006257: Categorical Exclusion Determination

Ponderosa 500-230 Kilovolt (kV) Transformer AdditionCX(s) Applied: B4.6Date: 06/29/2011Location(s): Prineville, OregonOffice(s): Bonneville Power Administration

Office of NEPA Policy and Compliance

June 29, 2011
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Ponderosa 500-230 Kilovolt (kV) Transformer Addition
CX(s) Applied: B4.6
Date: 06/29/2011
Location(s): Prineville, Oregon
Office(s): Bonneville Power Administration

The proposed project includes modification of existing substation equipment, installation of a new 500-230-kilovolt (kV) transformer, and an eight acre expansion northwest of the existing yard. The yard expansion is to facilitate the addition of a new 230-kV 2-bay breaker-and-a-half bus, four bays and the new transformer. A new control house would be built to accommodate controls and protection for the new equipment. The existing road to the south would be modified and graveled. All activities would occur on previously disturbed soils within Bonneville Power Administration's (BPA) property boundary.

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