The Marine Corps is proposing a year-end date for closing the brig at its base in Quantico, Va.
The move is part of a consolidation of military confinement facilities recommended by the 2005 Base Realignment and Closure Commission.
The Marine Corps notified the Defense Department of the date in a memo obtained Tuesday by The Associated Press.
Prisoners previously held in pretrial confinement at Quantico would be held instead at a regional military correctional facility in Chesapeake, Va.
The Quantico brig was the home for nine months to Army Pfc. Bradley Manning, the soldier suspected of passing classified documents to the anti-secrecy website WikiLeaks. He was moved to Fort Leavenworth, Kansas, in April. He is still awaiting trial.