(Mosaic #4, IA-92-05) SSE of Riverside, Iowa Township, Washington County, IA. Riverside Rd. S. 4.5 miles from jct with 1st St. in Riverside to the quilt on the N. side of the road. Alan & Linda Thomann. (N41 26.366 W91 37.061) Photos by Jack & June Schmidt 6-17-12.