(Riverside Elementary, MI-75-09) in Constantine, St. Joseph County, MI. 2nd St. W. (curves S. & becomes Riverside Dr.) 0.6 miles from jct with US131 to the school on the E. side of the road at 669. (N41 49.991 W85 40.422) Photo by Mark & Gordie Comstock & Larry Baker 6-14-20.