BELFAST — Repair crews from up and down the East Coast converged on Maine in their bucket trucks this week to help fix power lines damaged in the ice storm.

At least 350 line crews came to Maine from other New England states, New York, New Jersey, Pennsylvania, Florida and New Brunswick to aid Central Maine Power in what spokesman John Carroll described Thursday as “an enormous effort” to restore power to the utility’s 123,000 customers initially left in the dark. By early Thursday afternoon, that number had been reduced to less than 23,000, mostly concentrated in Kennebec and Waldo counties.

“That’s 123,000 hard-fought restorations,” Carroll said.

The heavy ice continuing to weigh down branches, the cold weather Christmas Day and Thursday’s snowfall all have conspired to make conditions hard for the line workers as they toil to restore the electricity. Restoring power after an ice storm is different, and more challenging, than working after a hurricane or snowstorm, Carroll said.

“The roads are so slick. Our own equipment is slicked with ice, and the branches are so heavy,” he said. “It’s very dangerous.”

In addition to the line crews from away, CMP also has about 90 of its own regular line crews and about 450 two-man tree crews at work in the state.

Initially, an assessment team drives the power lines to find the damage. Then the tree crews go to work clearing the heavy limbs and trees away from the wires, followed by line workers who repair the utility’s equipment. Most crew members work 17 hours and then have seven hours off, Carroll said, with a smaller assortment of tree crew workers at it overnight to try to stay ahead of the line workers.

The company also is in the midsts of a massive, round-the-clock to keep the organization flowing smoothly. CMP needs to feed and house emergency workers so they don’t waste any of their seven hours off looking for shelter.

“A big part of the challenge of this is making sure we use all these crews efficiently,” Carroll said. “You don’t want a dozen trucks waiting for instructions for any length of time.”

The utility had a big challenge in finding food for all the workers on Christmas Day, when most restaurants are closed.

“We have 750 line workers and tree crews. They had to eat,” he said.

So CMP officials got to work, contacting Roger Bintliff, innkeeper at the Senator Inn & Spa in Augusta. At first he told them that the restaurant was closed and he had sent his staff home to enjoy the holiday with their families.

“When we explained the situation, he said, ‘I’ll do it,’” Carroll said. “He called his people up.”

Still, the scale of the operation was daunting, especially on a holiday. There wasn’t enough food in the facility. So CMP officials made a special call to the owner of Ballard Meats & Seafood in Manchester to get supplies, and the company came through. The power utility’s employees helped serve, bus tables and wash dishes, and the cold line crews were warm and well-fed.

“They put on a spectacular prime rib roast dinner for 750 people,” Carroll said. “Once (Bintliff) agreed to do it, he did a spectacular job.”

By Thursday, workers had generally helped restore power to the more populated affected areas of the state and were working in more remote regions. In some places, the power lines do not run next to the road, but instead crews must access them via snowshoes or snowmobiles. On Islesboro, where all 922 CMP customers still had no power, the utility sent two ferry loads of bucket trucks on Thursday.

Carroll said he hoped there would be fewer than 10,000 customers still without power by Thursday night.

“We’re getting there,” he said.