Subscriber Login

North America News

SCE completes West of Devers Upgrade Project [free access]

June 10, 2021

Southern California Edison (SCE) has recently completed the West of Devers Upgrade Project—significantly increasing the transmission capacity to accommodate the influx of renewable energy from desert areas in the eastern part of California to the population centres of the Inland Empire and San Gabriel Valley. The upgrade project has increased the power transfer capability of the West of Devers grid facilities from about 1,600 MW to 4,800 MW.


The construction of the USD740 million project began in early 2018. It involved replacing an existing, approximately 48-mile (77.28-km), 220 kV transmission line with a new double-circuit line of similar voltage level between the existing substations at Devers (near Palm Springs), Vista (in Grand Terrace) and San Bernardino. Of the total length, a 6-mile (9.66-km) stretch crosses the area reserved for the Morongo Band of Mission Indians (a federally-recognised tribe in California), and approximately one mile (1.61 km) passes through Bureau of Land Management (BLM)-administered public land in the east of Banning and west of Desert Hot Springs in Riverside County.


As part of the project, SCE had entered into a transaction with Morongo Transmission LLC—owned by the Morongo Band of Mission Indians, which allowed SCE to build the project across the Indian Reservation.