LIMESTONE — A Maine company that refurbishes military vehicles might have to lay off nearly half its workers unless it receives substantial work orders soon.

Tim Corbett of the Maine Military Authority in Limestone says he told workers that 152 of the company’s 350 workers could lose their jobs on March 1.

The authority has refurbished about 10,000 Humvees for the National Guard.

Corbett says the company’s funding comes from Defense Department earmarks. But he says the earmarks didn’t pass Congress this year.

He tells the Bangor Daily News that in the past the company has worked with Maine’s congressional delegation to avoid the cutbacks, but they couldn’t do it this year.