Projects and Resource Planning

Generating Station Projects

Black Mountain

New generating resources will support projected growth and economic development in Kingman, Lake Havasu and throughout the Mohave County area. To satisfy growing customer energy needs, UniSource is exploring a possible expansion of facilities at the Black Mountain Generating Station located about 15 miles southwest of Kingman.

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Transmission Line Projects

Santa Cruz Reliability

UniSource is preparing plans for new transmission facilities to improve the reliability and resiliency of the electrical transmission system serving Santa Cruz County.

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Golden Valley 230 kV

UniSource is developing plans for a double-circuit 230kV transmission line from the Harris Substation to the new Mineral Park Substation to improve reliability, replace aged equipment, and accommodate a projected 5 to 35 megawatt increase in load over the next decade in the north Golden Valley area of Mohave County.

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Rio Rico-Harshaw

The Rio Rico-Harshaw Line will involve the construction of an approximately 20-30 mile, single-circuit 138 kV transmission line mounted on steel monopole structures. The project will interconnect UNSE’s existing 138 kV transmission system to the planned Harshaw Substation through a planned 138 kV switchyard in Rio Rico.

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Nogales Tap to Kantor Upgrade

The proposed project includes upgrading a 27.5-mile segment of UES’ existing 138-kilovolt (kV) transmission line that serves customers in Santa Cruz County and building a new substation west of Nogales.

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Antares to Meadview

UniSource has proposed building a new approximately 10‐mile transmission line to strengthen the local energy grid and improve power quality and reliability for customers in the community of Meadview, located northwest of Kingman, Arizona.

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Generating Station Projects

UniSource Energy Services: Resource Planning

Resource Planning

UniSource is planning a path toward a cleaner energy future and changes in our customers’ energy needs.