Categorical Exclusion Determinations: B4.6

Archer Communications Building CX(s) Applied: B4.6 Date: 03/07/2012 Location(s): Wyoming Offices(s): Western Area Power Administration-Rocky Mountain Region

Structure Replacement Flaming Gorge-Vernal No.3 138 Kilovolt Transmission Line CX(s) Applied: B4.6 Date: 03/06/2012 Location(s): Utah Offices(s): Western Area Power Administration-Rocky Mountain Region

Pearl-Marion #1 Tower 6/2 Replacement Project CX(s) Applied: B4.6 Date: 02/23/2012 Location(s): Oregon Offices(s): Bonneville Power Administration

Pearl Substation 500-Kilovolt #6 Bay Addition CX(s) Applied: B4.6 Date: 02/13/2012 Location(s): Oregon Offices(s): Bonneville Power Administration

Hatwai 230-Kilovolt Substation Breaker Replacement CX(s) Applied: B4.6 Date: 02/09/2012 Location(s): Idaho Offices(s): Bonneville Power Administration

Upgrade of the Existing Septic System at the Redmond Substation and Maintenance Facility CX(s) Applied: B4.6 Date: 02/08/2012 Location(s): Oregon Offices(s): Bonneville Power Administration

Upgrade of the Existing Septic System at the Big Eddy Substation and Maintenance Facility CX(s) Applied: B4.6 Date: 02/07/2012 Location(s): Oregon Offices(s): Bonneville Power Administration

Yellowtail Dam Tie Lines CX(s) Applied: B2.5, B4.6 Date: 01/25/2012 Location(s): Montana Offices(s): Western Area Power Administration-Rocky Mountain Region

Bucknam Temporary Tap, Natrona County, Wyoming CX(s) Applied: B4.6 Date: 12/15/2011 Location(s): Wyoming Offices(s): Western Area Power Administration-Rocky Mountain Region

Associated Electric Cooperative, Inc. Substation Improvements CX(s) Applied: B4.6 Date: 12/05/2011 Location(s): Missouri Offices(s): Southwestern Power Administration