Stone arch bridge (Old Jamestown Rd.) NE of Florissant, Florissant Township, St. Louis County, MO. Patterson Rd. N. (curves NE) 2.0 miles from jct with US67 in Florissant, continue NE on Greenway Chase Dr. 0.3 miles, continue NE on Vaile Av. 2.3 miles, E. on Old Jamestown Rd. 0.25 miles to the bridge at 17710. (2-28-06, N38 50.81 W90 16.62) Photos by Jack Schmidt.