The prison, which opened in 1889, is a state facility that holds about 1,100 inmates in maximum and minimum-security housing. The inmate population consists of adult males, aged twenty-one and older. The prison was listed on the National Register of Historic Places as State House of Correction and Branch Prison on November 23, 1977.
http://www.michigan.gov/corrections/0,4551,7-119--5326--,00.html