Complex sentence: The men's prison opened on the south side of M-61 (Michigan highway) in 1990 and although scheduled to close on October 1,2009, interest in the prison has been raised by the prospects of it housing Gitmo prisoners.
Split into simpler sentences: The men's prison was located on the south side of M-61 (Michigan highway). Although scheduled to close on October 1,2009, interest in the prison had been raised by the prospects of it housing Gitmo prisoners.