Seppman Mill

Seppman Mill is a stone windmill in Blue Earth County, Minnesota, standing approximately 32 feet (10 m) tall with a base diameter of about 30 feet (9 m). The structure features a rotating wooden dome designed to catch wind currents and power the grinding mechanism inside.

German immigrant Louis Seppmann constructed this mill between 1862 and 1864, drawing on his skills as a stonemason and mechanical knowledge. The structure was built during an era when pioneers adapted Old World techniques to meet the region's growing milling needs.

The mill represents early European settlement in Minnesota and demonstrates how German craftsmanship was transferred to the American frontier. Visitors can still see the connection between traditional skills and practical innovation that shaped this structure.

The interior remains closed to visitors, but the exterior can be viewed during Minneopa State Park operating hours throughout the year. The site offers good access paths and sits within walking distance of other park facilities and attractions.

In its peak years, farmers traveled considerable distances to mill their grain, with the structure processing around 150 bushels per day under favorable wind conditions. This output made it a crucial grinding center for the surrounding agricultural community.