Design and Construction
A variety of transmission line structure designs may be used for the project. The structures may be a combination of single and double circuit towers and steel lattice and tubular steel towers. The proposed design aspects for the towers are listed below:
Tower height
Steel lattice: 140 to 190 feet
Steel pole H-frame: 100 to 150 feet
Tower footprint: 40 feet x 40 feet
Span length: 1,200 to 1,500 feet
Ground clearance: minimum of 35 feet
Right of way width: 250 feet
Construction
Construction of the proposed transmission line would begin after Idaho Power receives permits from the Bureau of Land Management and the U.S. Forest Service, and a site certificate from the Oregon Department of Energy. If the project is approved, Idaho Power could begin construction by mid-2011.
Idaho Power will oversee all transmission line and substation design and construction. Idaho Power plans to contract with construction companies to build the line.
During construction, Idaho Power will utilize best management practices in order to prevent the spread of invasive plant species.
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