The Zinsmaster Baking Company began in Duluth in 1913 as the Zinsmaster-Smith Bread Company, Harry W. Zinsmaster and R. F. Smith partners. The small local enterprise grew to one of national importance. Principal company staff retired in 1977 and 1978, and Zinsmaster was acquired by Metz Baking Company in January 1978.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
The Zumbro Flour Mill was owned by John M. Cole. This mechanical drawing provides a cross section of the mill and includes details on the water wheel, separator, cockle machine, bran duster, purifier, wheat bins, stock hopper, flour bins, grading wheels and receiving elevator and other machinery.
Construction of the Lake Zumbro Hydroelectric Power Plant dam began in this area of the Zumbro River in 1917. The structure was designed by noted hydroelectric engineer, Hugh Lincoln Cooper. The dam, completed in 1919, is owned by Rochester Public Utilities.