(Album, IA-92-07) S. of Riverside, Iowa Township, Washington County, IA. Riverside Rd. S. 2.6 miles from jct with 1st St. in Riverside to the quilt on the W. side of the road at 1465. in Riverside, Washington County, IA. Leon Simon. (N41 26.571 W91 35.120) Photos by Jack & June Schmidt 6-17-12.