STONEHAM – The director of Camp Susan Curtis said a fire that destroyed a more than 40-year-old log cabin used as the camp’s office Tuesday would be only a minor setback.

Volunteers were already stepping forward and offering to rebuild the camp office, which serves more than 700 poor children from Cumberland, Oxford and Androscoggin counties each summer, said Camp Director Patrick Carlson.

The biggest setback would be a series of financial grants the camp seeks annually. Most of the grant applications, many due by March 15, were destroyed in the fire, Carlson said. But by Wednesday he had already began to contact the grant organizations to notify them of the fire and seek an application extension.

Meanwhile, others were contacting the camp by phone and in person asking what they could do to help rebuild the 25- by 35-foot cedar log cabin building that was completely gutted.

Carlson said the building was insured and the camp’s insurance company had been notified. He also said local fire officials believe the fire was electrical in nature. No damage estimates were available Wednesday afternoon, as insurance adjusters had not visited the camp, Carlson said.

Firefighters from Stoneham and Waterford contained the blaze to the single building at the camp complex founded by former Maine Gov. Kenneth M.Curtis and his wife Pauline in memory of their daughter Susan, who died of cystic fibrosis at age 11.

The camp has long served economically disadvantage children, many from the Oxford Hills and Lewiston-Auburn school systems, Carlson said.

Members of the Bethel Rotary Club contacted him on Wednesday and offered to form weekend work crews to rebuild the office building before the onset of the camp’s 10-week summer season, which starts in June, Carlson said.

He also credited firefighters with keeping the blaze from spreading. “That was the main concern,” Carlson said.

Several towering evergreens surrounding the cabin were slightly scorched from the blaze.

He said the outpouring of concern and offers for help were heartening for the nonprofit camp, which gets about 98 percent of its funding from Maine companies and people. “The one thing I’ve learned is Maine is an incredibly caring place,” Carlson said.