Lower Mid-Columbia/Midway - Vantage 230-Kilovolt Transmission Line Upgrade ProjectCX(s) Applied: B4.6, B4.7, B4.13Date: 02/23/2010Location(s): Grant County, WashingtonOffice(s): Bonneville Power Administration
Office of NEPA Policy and Compliance
February 23, 2010
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CX(s) Applied: B4.6, B4.7, B4.13
Date: 02/23/2010
Location(s): Grant County, Washington
Office(s): Bonneville Power Administration
Upgrade the lower Mid-Columbia area 230-kilovolt (kV) transmission system in Grant and Benton counties, Washington. The project requires re-conductoring 10.6 miles of the Midway-Vantage 230-kV transmission line, re-terminating the existing Vantage-Columbia 230-kV line at the Vantage Substation, and installing related transmission and communications equipment within the Midway and Vantage substations. Upgrades are needed to mitigate thermal overloads due to Columbia River flow management changes for environmental requirements, and to maintain system reliability in the area.