Starting Monday, the U.S. 421 entrance to Blue Grass Army Depot in Madison County will be closed to the public each day from 9 p.m. to 5:30 a.m.
Only people involved with official depot business can use the gate during those hours.
The gate closing, which will last indefinitely, will mean a reduction in the number of personnel working the main gate, said Mark Henry, the depot's acting public affairs officer.
"Anyone that comes into or out of the gate ... will have to be recorded so the guards know who's coming in and who's leaving," Henry said. "They can't just pull up and say 'I'm working this shift.' It's going to be a very controlled situation."
The closing will not affect the installation's day and evening shift operations nor the operations at the Blue Grass Chemical Agent-destruction Pilot Plant.
The action is being taken as a voluntary cost-cutting effort, Henry said.