The 70-year-old Maine State Police Troop D barrack in Thomaston has been dismissed for the final time.

The barrack closed June 30. Starting July 1, Troopers will be based out of offices in Augusta at 36 Hospital St. State officials said the closure will save $48,000 annually. The move was made as part of a budget balancing act by the governor. The Thomaston barrack was the only one closed.

The barrack, built in 1940, was the oldest in Maine. The state owns the building.

The staff members who operate out of the building in three shifts will be relocated to space in Augusta. State police administration has said the response time for the region will not be increased by the relocation. Troopers will continue the regular patrols they have now with the base in Thomaston.

Troop D patrols Knox, Lincoln, Waldo, and Sagadahoc counties, the southern half of Kennebec County, part of northern Cumberland County, and Interstate 295 from Brunswick to Gardiner. Troop D’s staff consists of a lieutenant, three sergeants, 24 troopers and a secretary.

The Thomaston building was renovated and expanded in 1994.

The other state police field troop barracks are located in Orono, Gray, South Portland, Skowhegan, Alfred, Ellsworth and Houlton.

The Maine Bureau of General Services will decide what to do with the Thomaston building, which is adjacent to the former Maine State Prison property that is now owned by Thomaston. Chip Gavin, the director of the Bureau of General Services, said the Legislature has already authorized the department to sell the property. He said the town has expressed interest in making it part of the adjacent Thomaston Green.