The photographs in the Power family photograph collection cover a broad range of interests and activities, spanning the years 1872-1945. The photograph collection represents not only some of the business investments and properties; it also documents family, friends and social life in Montana at the turn of the century.

The photographs are arranged by subject, beginning with the family in alphabetical order, each file also sorted chronologically. Subjects following Power family include Power connected Business Enterprises, Ranches, and Residences. General topics include Animals, Children, Cities and Towns, Forts and Fortifications, Groups, Houses, Indians of North America, Landscapes, Portraits of Men, Mining, Monuments and Memorials, Recreation, Transportation, U.S. Senators, Universities and Colleges, Portraits of Women, and Yellowstone National Park.