BANGOR, Maine — Bangor International Airport has been awarded a $38 million federal contract to refuel military planes.

Airport Director Tony Caruso said Thursday that these contracts typically are awarded every three or four years based on the military’s estimated usage of the airport. About one-third of Bangor air traffic is military related.

The four-year contract will allow the airport to supply jet fuel for U.S. Army, Navy, Air Force, Marine Corps and federal civilian agency flights. The contract doesn’t apply to troop flights, which are under a separate contract, according to Caruso.

“We’re very pleased that we have the relationship we do with the military,” Caruso said.

The contract was announced Feb. 26.