(Four Block Pinwheel, TN-82-08) W. of Colonial Heights, Sullivan County, TN. Rock Springs Rd. SW 1.8 miles from jct with I26 exit 6 on the W. side of Colonial Heights to the quilt on the SE side of the road at 2127. Tony & Elizabeth Webb. (N36 27.317 W82 33.781) Photos by Jack & June Schmidt 6-16-18.