The records of the Historic American Building Survey and Historic American Engineering Record document achievements in architecture, engineering, and design in Montana through a comprehensive range of building types and engineering technologies including examples as diverse as the Pioneer Historic District, Zimmerman Homestead, Isaac Eddy Ranch, Crow Agency Historic Complex, Hamilton Post Office, Thomas Francis Meagher House, Pine Creek Bridge, Mullan Road Segment, Hauser Hydroelectric Facility, and the Glenn Lake Irrigation District, Grave Creek Dam.

Some records can also be found online through the Library of Congress.