(Spencer’s Grove, 43', 2004, 15-06-A) across pond inlet N. of Urbana, Polk Township, Benton County, IA. IA150 (31st Av.) N. 2.7 miles from jct with I380 exit 43 NW of Urbana, E. on IA920 (51st St.) 1.2 miles to the bridge on the S. side of the road at 3224. (N42 17.014 W91 51.970) Photos by Jack & June Schmidt 6-26-12.