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The California Public Utilities Commission (CPUC) has granted a request from the City of Chino Hills to put underground a segment of Southern California Edison's Tehachapi Renewable Transmission Project (TRTP).

The CPUC agreed with the City's assertion that the design of the above-ground line "ignores community values and places an unfair and unreasonable burden on residents."

Currently, the 3.5-mile segment of the 500 kV transmission line running through Chino Hills consists of massive transmission towers reaching nearly 200 feet tall and set in a narrow 150-foot right of way. The CPUC's decision "rectifies that disproportionate burden and finds that it is in the public interest to construct an underground alternative based on a single-circuit, two cables per phase design using cross-linked polyethylene cable."

It will cost approximately $224 million to build the underground Chino Hills portion of the line.

The TRTP is part of a series of new and upgraded high-voltage electric transmission lines to deliver electricity from wind farms in the Tehachapi wind source area north of Los Angeles to customers and the California power grid

Hybrid Energy Innovations 2015

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