Selby Tunnel, November 1906 (MNHS.org-HE4.4SP14) Construction of the lower portal of the tunnel begins. On top of the hill, another crew is working to make the job go faster. Circa 1906, courtesy Minnesota Historical Society. Similar Images ...based on the tags: historical-image... Offices and Laboratory, as seen in 1908. An excellent view into one of the many sewing rooms, circa 1920s. Note forms for dresses around the room and oil lamps. Postcard from 1915 showing the plant. Published by the local drug store! Note the two tunnels behind the steam plant in this 1930s image from MNHS.org. The RL Hearn GS, seen in the 1960s by the looks of it. Carriage ad. (1905). Garden & home builder, 1-2. Retrieved from http://books.google.com/books?id=3OZIAAAAYAAJ Eureka Mill, 1950, Wolle, Muriel Sibell, Denver Public LIbrary A map of the mines overlaid with the plant (now demolished).