EACO Flour Mill and Loon Lake. Material: glass. Size: 4" W. x 5" L. x 1/16" D. Description: glass plate image: EACO Flour Mill and the railroad trestle across the east end of Loon Lake, all perfectly reflected in the lake water. Minneapolis and St. Louis Railroad. M & St. L Railroad. Chicago and Northwestern Railroad. C & NW Railroad. Dakota, Minnesota and Eastern Railroad. DM & E Railroad.