Hi Melissa,
Here are a few comments.
1. Cribean McDaniels' death record says he was born July 4, 1828.
http://seekingmichigan.contentdm.oclc.org/cdm/singleitem/col...His tombstone says he was born in 1829.
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=mc...;
Find-A-Grave lists five McDaniels buried, or have memorials in Oak Grove Cemetery
http://www.findagrave.com/cgi-bin/fg.cgi?page=gsr&GSiman...Make contact with someone, the Sexton, at the City of Coldwater offices to answer the questions you have about the burial plots.
http://www.coldwater.org/CommunityResources/Oak_Grove_Cemete...The writeup about Cribean says he was a veteran of the Civil War. Check if his grave site has a marker stating he was a CW veteran.
Ask the Sexton. If there is no marker, contact someone from the Son of Union Veterans of the Civil War, SUVCW, to find out how to get a marker placed on Cribean's grave.
http://www.suvcwmi.org/memorials/http://www.suvcwmi.org/camps/Good luck.
Bob Gaudio