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Santa Cruz Reliability Project South

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

Santa Cruz Reliability (SCR) Project South is designed to strengthen the local energy grid by building a new 138 kilovolt (kV) transmission line to interconnect its Kantor Substation in Amado to the Valencia Substation in Nogales through the planned Gateway Substation west of Interstate 19 and West Mariposa Road.

This upgrade, the Santa Cruz Reliability Project South, is the last of three phases in a project designed to improve transmission service in the area.

Public Open Houses

In-Person Public Open House: Tubac
May 13, 2025, 1-3 p.m.
Presentation begins at 2 p.m.
Tubac Community Center, Long Room
50 Bridge Rd, Tubac, AZ 85646

In-Person Public Open House: Rio Rico
May 13, 2025, 5-7 p.m.
Rio Rico High School, Cafeteria
590 Camino Lito Galindo, Rio Rico, AZ 85648

Virtual Public Open House
May 21, 2025, 4-5 p.m.
Microsoft Teams link to come