The Southwest Transmission Project, encompassing the elements described below, provides the means for delivery of San Juan Project entitlements to the M-S-R PPA membership.
Mead-Phoenix is an alternating current transmission line with an accepted rating of 1,923 MW. The project is a 256-mile, 500kV AC transmission line constructed from the Perkins Switchyard near Sun City, Arizona to Marketplace Substation in Southern Nevada. This transmission line was pre-designed and environmental permitted to be converted to a DC transmission line in the future. It is utilized to deliver electrical energy between Central Arizona and Southern Nevada.
Mead-Adelanto is an alternating current transmission line with an accepted rating of 1,291 MW. The project is a 202-mile, 500kV AC transmission line constructed from Marketplace Substation in Southern Nevada to the 500kV Adelanto Switching Station in Southern California including series capacitors at Marketplace and Adelanto Substations. This transmission line was pre-designed and environmental permitted to be converted to a DC transmission line. It is utilized to deliver electrical energy between Southern Nevada and Southern California.
M-S-R PPA sold its interests in Mead Adelanto/Mead-Phoenix to the Southern California Public Power Authority, effective May 25, 2016
M-S-R has executed an Interconnection Agreement with the Tucson Electric Power Company (TEP) in conjunction with M-S-R’s purchase of its interest in San Juan Unit 4. Pursuant to this agreement, M-S-R can deliver all or a portion of its generation entitlement to TEP at the San Juan high-voltage switchyard and receive a like amount of generation at the following locations in Central Arizona: Moenkopi Substation, Westwing Substation, and the Palo Verde Switchyard. From Westwing Substation, M-S-R can access its ownership in Mead-Phoenix.
At Midway Substation, the individual M-S-R Members use transmission rights under their control as Members of the Transmission Agency of Northern California (TANC) to deliver power between Midway Substation and other points in Northern California.