(Log Cabin, IA-92-06) S. of Riverside, Iowa Township, Washington County, IA. Riverside Rd. S. (curves W.) 3.0 miles from jct with 1st St. in Riverside to the quilt on the S. side of the road. Marie Goldsberry. (N41 26.346 W91 35.272) Photos by Jack & June Schmidt 6-17-12.