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US DOI authorises construction of Ten West Link project [free access]

July 18, 2022

The US Department of the Interior (DOI) has announced that it has authorised the construction of the 500 kV Ten West Link Transmission Line project.


The project entails the construction of a 500 kV transmission line between the Arizona Public Service Company’s Delaney substation in Tonopah, Arizona, and the Southern California Edison Company’s (SCE) Colorado River substation in Blythe, California. The line will run across Maricopa and La Paz counties in Arizona, and in Riverside County, California. The project will largely be built along SCE's existing 500 kV Devers–Palo Verde transmission line route, leading to minimal impact on the land and other resources. The USD389 million project is 75 per cent owned by Starwood Energy Group Global LLC and 25 per cent owned by Abengoa SA.


Arizona Corporation Commission (ACC) and California Public Utilities Commission (CPUC) have already approved their respective portions of the project.


DOI's approval allows developer Delaney Colorado River Transmission to start building the line, which is expected to be operational in 2023.