Fort Meade officials evacuated a residential section of the base Tuesday afternoon after utility workers discovered unexploded ordnance.
The device was found to be an inert mortar training round from World War II, a base spokeswoman said, and residents were allowed to return to their homes.
The utility workers discovered the round in the Potomac Place neighborhood while performing scheduled maintenance, spokeswoman Mary Doyle said. Emergency workers cordoned off a 300-meter area and rerouted traffic around Reece Road.
An explosive ordnance disposal team from Fort Belvoir in Virginia identified the round and removed it, Doyle said.
She said utility and construction workers on Fort Meade are aware of the potential to encounter unexploded ordnance in the course of their work and are trained in proper procedures to report the devices.