(Rockport) N. of Rockport, Ohio Township, Spencer County, IN. Silverdale Rd. (CR100W) N. 1.8 miles from jct with IN66 on the NW side of Rockport, E. on CR200N 1.0 miles, S. on Base Rd. 0.5 miles to the tower on the W. side of the road. (N37 54.491 W87 03.289) Photos by Jack & June Schmidt 6-10-17.