How many miles of new transmission lines are needed?

Approximately 9-12 miles of new transmission line are needed, depending on final routes selected to connect the planned Adonis Substation and the existing Marana Substation. The new Saguaro to Marana 115/138kV transmission line would begin at the planned Adonis Substation and proceed west across Interstate 10, continuing to the intersection of North Sanders Road and West Marana Road. This portion of the Project will be constructed as a double circuit transmission line. One circuit will be owned and operated by AEPCO, and one circuit will be owned and operated by TEP. The AEPCO circuit will be energized at 115kV, while the TEP circuit will be energized at 138kV. The co-location of AEPCO and TEP assets will minimize environmental impacts and provide efficiencies in the permitting processes required to build the facilities. From North Sanders Road and West Marana Road, the remainder of the line proceeding west to the existing AEPCO Marana Substation will be single-circuit 115kV, solely owned by AEPCO.