The Oklahoma Department of Corrections uses 867.7625 MHz statewide for most operations. Some prisons have repeaters on this frequency or it can be used simplex by both Corrections and Highway Patrol Units as "DOC Direct."
The Department of Corrections may no longer be using the VHF or UHF frequencies listed here as they migrate to the OKWIN 800 MHz trunked system.
The Great Plains Correctional Facility is a minimum security facility located near Hinton in northern Caddo County. The facility is operated by Cornell Companies, Inc.. The facility is currently vacant.
Great Plains Correctional Facility -- Security and Prisoner Movements