(Star Spin, MN-28-47) NNW of Spring Grove, Black Hammer Township, Houston County, MN. CR4 N. 4.3 miles from jct with MN44 W. of Spring Grove, W. on Blackhammer Dr. 0.75 miles to the quilt on the S. side of the road at 21113. David amp; Shirley Alstad. (N43 36.926 W91 40.553) Photos by Jack & June Schmidt 7-3-12.