The William H. Schacht Files include correspondence, engineering records, labor and labor union files, and other material from all Copper Range Company operations in the Copper Country. Of particular value is the extensive correspondence between Schacht and Treasurer F. W. Paine, which provides insight into the top management of the Copper Range Company during the 1920s and 1930s.

A small amount of material, notably the aerial survey photographs, pertains to Schacht's position as president of the Copper District Power Company. Another small number of files from Schacht's successors as General Manager are also included in this subseries.

For Schacht's files pertaining to the Copper Range Railroad Company, see the records of the President's Office in Series IX, Subseries IV.