Thompson–Boughton Mill

The last remnant of the Thompson–Boughton flour mill is a millstone from a mill that operated on the river bank a half-mile to the south. The mill was powered by the stream that now tumbles down a rocky slope on the north boundary of the Wisconsin Interstate Park. This millstone is made of pieces of chert, a quartz-like stone mined in Germany, tightly secured by a metal band. It is four feet in diameter and weighs about 1,500 pounds. The millstone was found and preserved by Dr. Fred Riegel, who donated it to this historical display.

St. Croix Falls, Wisconsin · United States