Thompson–Boughton Mill
1878 – 1914
This millstone is the last remnant of the flour mill that operated on the river bank a half-mile to the south. Power was provided by the stream that now tumbles down a rocky slope on the north boundary of the Wisconsin Interstate Park.
Pieces of chert, a quartz-like stone mined in Germany, are tightly secured by a metal band to form this millstone. Four feet in diameter, the mill stone weighs about 1,500 pounds.
Sponsored by the St. Croix Falls Historical Society
In Cooperation with the City of St. Croix Falls
1998
Marker can be reached from North Washington Street (State Highway 87) north of River Street, on the left when traveling north.
Courtesy hmdb.org