Camp Lehman sat on 19 acres (77,000 m2) of land donated by the Michigan Department of Natural Resources and housed 582 adult male prisoners.
Also added at that time an activity building (Ontario unit) which primarily served as an activity/visiting room.
Originally the Camp was only to serve to provide labor for the Conservation Department but evolved into a correctional facility with a multitude of programs and functions.
Camp Lehman provided labor to various public authorities including the Michigan Department of Natural Resources and the Michigan Department of Military Affairs at Camp Grayling Army National Guard Training Site.
[2] On June 5, 2009, Regional Prison Administrator Jerri Ann Sherry arrived at Camp Lehman to announce to the staff that after more than sixty years of service to the People of the State of Michigan, Camp Lehman would be closed prior to November 1, 2009.
Camp Lehman provided the following prisoner programs: Adult Basic Education; General Education Development;[4] a pre-release program; substance abuse treatment; Alcoholics Anonymous & Narcotics Anonymous; Assaultive Offender Therapy;[5] Thinking for A Change classes;[6] parenting classes; smoking cessation classes; and group counseling and had a law library[7] that provided services for prisoners from throughout Michigan who were housed in Camps.
The camp had a Health Care Unit[8] that provided prisoners access to a physician assistant, nursing, dental and psychological services.
[9] Recreation for the prisoners included a gymnasium; softball field; outdoor basketball courts; outdoor handball court; weight pavilion; music room; in-room-hobbycraft;[10] walking/running track; and exercise stations.