EACO Flour Mill and Loon Lake. 4 3/4" x 3 3/4" black and white photograph of the EACO Mill from the Loon Lake side of the complex; a close-up view of the railroad trestle, smokestack spewing smoke; the five-story office building; the pitch-roofed storage building and several railroad cars parked on the track; Loon Lake waters in foreground. Minneapolis and St. Louis Railroad. M & St. L Railroad. Chicago and Northwestern Railroad. C & NW Railroad. Dakota, Minnesota and Eastern Railroad. DM & E Railroad.