(45' x 30', IA-10-06) E. of Independence, Byron Township, Buchanan County, IA. IA939 (1st St. - becomes 220th St.) E. 3.3 miles from jct with IA150 (5th Av.) in Independence, N. on Nathan Bethel Av. 0.45 miles to the crib on the E. side of the road at 2158. (N42 28.483 W91 49.456) Photo by Jack & June Schmidt 6-25-12.