Jerry, Since I live not too far away from Polk Co. I thought I'd give it a try. I tried your coordinates and the map shows Pleasant Hope Cemetery on Cemetery Drive in Pleasant Hope, Polk County Mo. which is a little over 20 miles from Aldrich. By any chance do you have the name of a road Coffman is on/near? Is it Old Cemetery Road AKA S. 57th St.?
I looked at "Look to the Past" Polk Co cemetery list http://www.looktothepast.com/polkcem.html
and they have:
COFFMAN-HOWE: 2 miles northeast of Aldrich about 1/4 mile east of Wollard Cemetery.
I looked at the Google Earth map for Wollard Cemetery on Old Cemetery Road and looked around the area for another cemetery but I couldn't see one, there are a lot of trees.. it would help me if you have the name of a road..