Crews have not been able to repair the break yet because of the ongoing avalanche danger, Xcel Energy spokeswoman Michelle Aguayo said.
The cleanup work from the Vail Pass slide and later from avalanches intentionally triggered by road crews to avoid more problems shut down portions of I-70 in the mountains.
Closures could be lengthy and people were urged to avoid traveling along I-70 in the mountains, Colorado Department of Transportation spokeswoman Tracy Trulove said.
The avalanche danger in the central mountains was rated as extreme, the highest rating.
The Colorado Avalanche Information Center said high snowfall for March combined with strong winds have created some of the most dangerous avalanche conditions in years.
An avalanche on Sunday stunned drivers along the interstate, sweeping vehicles off the road but not causing any injuries.
All the new snow has proved to be too much of a good thing for some ski resorts.
Arapahoe Basin Ski Area closed in part because of the extreme avalanche danger. In addition, an access road was closed by the avalanche danger.
Other resorts were open, including Copper Mountain but with some lifts closed.
One intentionally triggered avalanche near Empire reached Interstate 70 for the first time since 1957.
Snow from another intentional avalanche near the Eisenhower Tunnel covered all four lanes of the highway and left snow and other debris up to 15 feet deep over a 300-foot stretch of the road, the center said.