Red Rock – Benson Line is a 500kV overhead line with a length of 128.7km from Red Rock, Arizona, US, to Benson, Arizona, US.

The project, which is currently in the planning stage, is expected to be commissioned in 2026.


Red Rock – Benson Line is an overhead line that will be operated by Tucson Electric Power. The line will carry alternating current (AC) through single circuit cable.

Red Rock – Benson Line project development status

The construction works on the Red Rock – Benson Line project will be commenced in 2025 and commissioning is expected in 2026.

About Tucson Electric Power

Tucson Electric Power Company (TEP), a subsidiary of Fortis Inc is a power generation company that generates, distributes and transmits electricity. The company offers services such as electricity supplying and distribution, power generation, and incentive programs to help them reduce their energy costs. It also offers electric service for new construction installations, increases or relocations, or request removal of electrical facilities. TEP provides its services through traditional resources and green power projects.


All publicly-announced T&D Line & Substation projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects is sourced through secondary information sources such as country specific utility players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.