(South Branch, 82') across South Branch Little Missouri Creek NNW of Mt. Sterling, Pea Ridge Township, Brown County, IL. IL99 N. 5.0 miles from jct with US24 in Mt. Sterling, W. on 1475N (becomes 1500N/CR2) 2.6 miles, S. on CR500E 1.2 miles to the bridge. (4-9-10, N40 03.026 W90 48.430)