(Whirlpool, IA-12-31) NE of Shell Rock, Butler Township, Butler County, IA. IA3 E. 1.0 miles from jct with Public Rd. on the N. side of Shell Rock, N. on Butler Av. 0.65 miles to the quilt on the W. side of the road at 22327. Dave & Marian Epley. (N42 43.474 W92 33.321) Photos by Jack & June Schmidt 7-7-12.