More than 540 firefighters continued late Saturday to battle a blaze on the Warm Springs Indian Reservation that has consumed about 1,100 acres around Bald Peter Butte, said Jefferson County Fire Chief Earl Cordes.

No structures were threatened by the wildfire, which is about 12 miles northwest of Camp Sherman but moving away from town, Cordes said. He said the fire is 25 percent contained.

Crews had succeeded in digging five miles of containment line primarily around the southern, eastern and northern flank of the fire but the fire was continuing to push west through steep territory thick with dead lodge-pole pines and sub-alpine fir.

”It’s great firewood,” Cordes said. ”It’s some of the worst conditions we’ve seen with these types of fuels in a long time.”

Eight crews of hotshots were working to control the blaze along with 12 hand crews, five helicopters, 21 fire engines and eight bulldozers.

He put the pricetag for the operation at $700,000 so far.

The Central Oregon interagency incident management team a coalition of managers from the U.S. Forest Service, Oregon Department of Forestry, Bureau of Land Management, National Parks Service, the Bureau of Indian Affairs and the Jefferson County Fire District No. 1 is staffing the fire, which started from a lightning strike at about 4 p.m. Thursday.