(Whirlwind, IA-38-50) N. of Holland, Colfax Township, Grundy County, IA. IA14 (N Av.) S. 0.45 miles from jct with US20 N. of Holland, W. on 170th St. 0.2 miles to the quilt on the N. side of the road at 22803. Roger & Nancy Hook. (N42 27.440 W92 46.359) Photos by Jack & June Schmidt 7-6-12.