AEPCO transmits wholesale electric power from Apache Generating Station in Cochise, Arizona, to our six Member distribution co-ops, which serve members in southern Arizona, western New Mexico, northwestern Arizona and California. AEPCO operates and maintains:
- 866 miles of transmission line owned all or in part by AEPCO
- 36 substations reaching out from Apache Station across Arizona to the northwestern corner of the state
- 30 telecommunications towers and an extensive fiber network used to communicate between AEPCO operations centers and substations, and Member cooperatives and customers
It takes a solid, reliable system to transmit power from our plant to our Member distribution electric co-ops, and on to their 420,000 member-consumers at the end of the line.
Transmission Partnerships Build Electric Reliability
In recent years, AEPCO has built an impressive track record of successful transmission partnerships among transmission utilities and distribution cooperatives. This collaboration is rooted in the knowledge that when the right partners come together, there is an opportunity for mutual benefits—reducing costs, improving reliability, and building a stronger system for a community or even an entire region.
- The Hilltop Interconnection involving Unisource Electric provides increased reliability and reduces downtime to many communities in Mohave County.
- The Valencia Interconnection between AEPCO’s system and the Central Arizona Water Conservation District system provides improved reliability to both systems, as well as in Trico Electric Cooperative’s service territory.
- AEPCO, APS and Sulphur Springs Valley Electric Cooperative (SSVEC) are working together to make major investments in new transmission facilities in Cochise County, Arizona, providing increased reliability to the AEPCO and APS transmission systems, and backup services to AEPCO Member SSVEC’s and APS’s distribution service territories. AEPCO’s portion of the Schieffelin-Tombstone Junction-Boothill Project is near completion.
- Substantial progress has been made on major projects in the Marana, Arizona, area, including agreements to acquire existing transmission assets and develop a joint highway crossing involving AEPCO, TEP and the Western Area Power Administration. The projects will help resolve long-standing reliability issues in the area and improve service to AEPCO Member Trico Electric Cooperative.
Having achieved lower project costs than our industry peers—and a reputation for quality design, construction, safety and timeliness—AEPCO has taken a lead role in most of these projects. This track record adds significant value to our partnerships and opens the door to future collaboration. These transmission partnerships enable AEPCO to resolve reliability concerns at the lowest cost and maximum benefit for all concerned.