(Clifton Mill Model RR, ~3', 35-29-(a) across a depression on a model RR at Clifton Mill in Clifton, Greene County, OH. OH72 S. 0.2 miles from jct with OH343 in Clifton, E. on Water St. 150&146; to the bridge on the S. side of the road E. of the mill. (N39 47.646 W83 49.507) Photos by Jim Crouse 3-16-14.