The Visual Materials subseries (6.5 linear feet) consists mainly of single site photograph albums, arranged alphabetically by state (Connecticut, Iowa, Michigan, Nebraska, Texas, and Wisconsin). These albums are further arranged alphabetically by construction site within the appropriate state. The albums document various hydroelectric, power plant, and dam construction projects undertaken by Fargo Engineering Company mainly in the period from 1906 to 1940. Within the Wisconsin grouping, however, there are four photograph albums which date from 1949 to 1951. The Michigan grouping is the largest, and contains extensive visual documentation of many large lower peninsula power projects undertaken between 1905 and 1937. Individual photographs in the albums have been well documented by Fargo Engineering, with most containing a job number and (or) date on each print. An attempt has been made in this finding aid to supply a location, Fargo job number, and surrounding dates for each album. The researcher can discover alternate names and the client for each job by referring to the Alphabetical Cross Index Of Jobs mentioned above.
While most of the state albums contain jobs for that state alone, there are some exceptions within the Michigan albums. The Irving Powerhouse and Dam album contains the Inks Dam in Texas, the Elk Rapids album contains the Nashua Dam in Iowa, and the Miscellaneous Michigan Sites album contains one site in Sheboygan, Wisconsin as well as multiple Michigan sites.
The Visual Materials subseries also includes seven glass plate negatives (unidentified), four multiple-site photograph albums, a single unidentified site in a post album, two folders of loose photograph album pages (Michigan and non-Michigan sites), and three folder of individual photographs (labeled Michigan, non-Michigan, and unidentified work sites).