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Posted on: March 6, 2018

TEP Seeks Approval and Public Input on New Power Line Project

Tucson Electric Power (TEP) is seeking public input on the site of a new transmission line and other aspects of the project. 

The project known as Sonoran Substation to Wilmot Switchyard to South Loop 138 Kilovolt (kV) transmission line would interconnect the Wilmot Energy Center to TEP's electrical system through the proposed 138kV facilities.

The proposed 138kV line would provide additional transmission capacity for area customers and provide additional reliability to the existing 138kV transmission system. The line would extend approximately 10 miles from the proposed Sonoran Substation in the City of Tucson to the Wilmot Switchyard to TEP's existing South Loop Substation, near South Nogales Highway and Pima Mine Road in Sahuarita, Arizona.

The line would cross land owned by the State of Arizona and private land in Tucson, Sahuarita and unincorporated Pima County. TEP would build the line with steel monopoles, each about 100 feet tall.

The City of Tucson would need to issue a land-use permit before the start of construction for the Sonoran Substation. TEP expects to file an application for a Special Exception Land-Use Permit in June 2018.

The Arizona Revised Statutes 40-360.03 requires TEP to secure a Certificate of Environmental Compatibility (CEC for the transmission line and switchyard from the Arizona Corporation Commission (ACC) prior to construction. The Arizona Power Plant and Transmission Line Siting Committee, a committee established by the ACC, will review the application in a public process and issue a recommendation to the ACC. The ACC will then review the application and make a final decision during a public meeting. TEP anticipates submitting its application for a CEC in August 2018.

Public input can be submitted to TEP via email at rdarling@tep.com or by visiting www.tep.com/projects and filling out an online form. Those interested in providing input may also call 1-877-672-2039 and leave a voicemail.

TEP also invites the public to attend an open house meeting about the project on Wednesday, March 28, 2018, from 5:30 to 7:30 p.m., at Summit View Elementary School, 1900 E. Summit Street. Interested residents may attend at any time that is convenient for them. Representatives of TEP will be available to provide more details and answer questions about the project.
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