(Diane Cooper, 30', 1969, 22-74-A) across Elk Creek WNW of St. Clair, Columbus Township, Sanilac County, MI. Clinton Av. (becomes Rattle Run Rd.) NW 6.8 miles from jct with MI29 (Riverside Av.) in St. Clair, SW on Gratiot Av. 1.8 miles to tthe bridge on the NW side of the road at 7864. (N42 51.288 W82 37.902) Photo by Mark Comstock 05-1999.