(MO-115-21) in St. Louis, St. Louis City County, MO. Arsenal St. W. 0.9 miles from jct with I55 exit 206C, SW on Gravois Av. 0.85 miles to the bldg on the SE side of the road. (N38 35.558 W90 14.591) Photo by Jack & June Schmidt 3-30-16.