Members of the commission, including its president and a board member, recently visited the city to inspect the construction of 200-foot high-voltage power lines by Southern California Edison.
The commission has been urged by several officials with ties to Chino Hills - most recently San Bernardino County Supervisor Gary Ovitt - to reverse its decision to permit building 19 power line towers in the city.
The lines are part of the Tehachapi Renewable Transmission Project, which is designed to bring wind-generated electricity from Kern County to the Los Angeles Basin. The project, part of a state mandate to use more sustainable energy, runs through five miles of Chino Hills.
"The state of California and Southern California Edison have not reached a point-of-no-return," Ovitt said. "This decision can and should be reversed immediately."
Ovitt also plans to send a letter to each commissioner as well as to Gov. Jerry Brown urging them to reverse their prior decision.
Chino Hills officials have argued Edison's easement is too narrow for expanding the size of the electrical towers currently being built in the city.
Transmission poles and towers are being erected within the right-of-way from Chino Hills' western border near Tonner Canyon, northeast to Peyton Drive and continuing east to the 71 Freeway and eventually going into Riverside County.
Commission President Michael Peevey took a tour of the tower construction last week with City Manager Michael S. Fleager.
State Sen. Gloria Negrete McLeod, D-Montclair, toured the project on Tuesday.
On Wednesday, representatives from the offices of Assemblyman Curt Hagman, R-Chino Hills, and state Sen. Bob Huff, R-Walnut, also toured the area with Public Utilities' Commissioner Timothy Simon.
"I think our residents through their emails, phone calls and letters are getting other legislators outside of our area to notice what is happen to us," Mayor Ed Graham said.
In September, the city lost its appeal to a panel of 4th District Court of Appeals judges in Riverside who said the commission has exclusive jurisdiction regarding the route being used by Edison.
A San Bernardino County Superior Court judge made a similar decision in 2010.
In late September, Chino Hills City Council members voted to file a request with the state Supreme Court to review the Court of Appeal's decision.
A Supreme Court decision on the city's request will be rendered by mid-January, according to a city news release.
"As more news and information comes out about our condition that will increase our likelihood the state Supreme Court will hear our case," Graham said.
Ovitt initially spoke out against the towers when SCE applied to the commission to run the easement through the city, said Brian Johsz, the supervisor's district director. Johsz said Ovitt, who represents the 4th District that includes Chino Hills, is concerned with how the towers infringe on the quality of life of residents and the potential health issues that they pose.
The city's battle with Edison started four years ago and has cost the city $2.4 million.
Construction of the towers started in October 2010.
Ten of the larger towers have already been installed in Chino Hills, replacing smaller existing structures on the right-of-way.
The $2.1 billion Tehachapi project is slated to be completed in 2015.
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