(Go State, IA-12-39) E. of Shell Rock, Shell Rock Township, Butler County, IA. Butler Center Rd. W. 3.3 miles from jct with Cherry St. SW of Shell to the quilt on the S. side of the road at 28632. Rock Patrick & Kim Lursen. (N42 42.015 W92 39.573) Photos by Jack & June Schmidt 7-9-12.