SAHUARITA AEPCO 345 kV TO GREENLEE/ SPRINGERVILLE TUCSON WINCHESTER TO VAIL REDTAIL, This permit application requests an amendment to the Class I permit for the Springerville Generating Station (“SGS”) located in Apache County, Arizona. SGS comprises four coal-fired electric generating units. This application pertains only to Units 1 and 2 at SGS, both of which are owned and operated by TEP., Defiance Cajon Needles San Bernardino Lucerne ValleySan Bernardino Winslow, The energy data, maintenance experience and costs with the Springerville crystalline silicon systems provide a treasury of information that establishes a benchmark for current utility-scale fixed flat-plate PV systems technology., Future plans for TEP include installation of 2 MW to 5 MW of additional solar PV at the Springerville site over the next few years. Technologies of various types for this addition will be considered, including Single Axis Tracking (SAT) PV, and High Concentrated PV., .