Exterior of the Chief Theatre in Bemidji. Photograph by Keith Ewing, July 1, 2017. CC BY-NC 2.0.

Minnesota State Sanatorium for Consumptives near Walker, Minnesota, September 1982.

Minnesota State Sanatorium for Consumptives near Walker, Minnesota, ca. 1950.

The front façade of Morrill Hall, an administration building on the University of Minnesota’s Minneapolis campus, March 17, 2010. Posted by Wikimedia Commons user AlexiusHoratius. CC BY-SA 3.0.

Minnesota and International Railway trestle bridge with a view of Coburn Creek. Photograph by Debra Kellner, ca. 2013. From the photograph collection of the Minnesota State Historic Preservation Office, St. Paul (inventory number BL-BKC-012). Public domain.

Minnesota and International Railway trestle bridge after the April 2015 fire. Photograph by Debra Kellner, 2015. From the photograph collection of the Minnesota State Historic Preservation Office, St. Paul (inventory number BL-BKC-012). Public domain.

Minnesota and International Railway trestle bridge exposed tie and stringers, east side. Photograph by Debra Kellner, ca. 2013. From the photograph collection of the Minnesota State Historic Preservation Office, St. Paul (inventory number BL-BKC-012). Public domain.

Minnesota and International Railway trestle bridge west side substructure and rail. Photograph by Debra Kellner, ca. 2013. From the photograph collection of the Minnesota State Historic Preservation Office, St. Paul (inventory number BL-BKC-012). Public domain.

Minnesota and International Railway trestle bridge bent with sway brace and cross brace. Photo by Debra Kellner, ca. 2013. From the photograph collection of the Minnesota State Historic Preservation Office, St. Paul (inventory number BL-BKC-012). Public domain.