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CX-007131: Categorical Exclusion Determination

Casa Grande-Empire Double Circuit Upgrade and Structure Replacement
CX(s) Applied: B1.3
Date: 03/08/2011
Location(s): Pinal County, Arizona
Office(s): Western Area Power Administration-Desert Southwest Region

Western proposes to replace structures and upgrade to a double circuit 230- kilovolt (kV) transmission line on its Casa Grande-Empire 115-kV transmission line, from Thornton Road to its Empire Substation, within Western's existing right-of-way. This will include the rebuild of 13.2 miles of transmission line, replacing the H-frame structures with steel monopole structures with foundations, hardware and insulator replacement and adding a overhead ground-wire over the entire length of the project. Western will access the structure using crew trucks along the existing access roads. This work is necessary to maintain the safety and reliability of the bulk electrical system.