1950 Map of Three Forks

About this map

Three Forks sits at the vital hydrological confluence where the Jefferson River, Madison River, and Gallatin River meet to form the Missouri River. This post-war survey illustrates a landscape defined by water management and heavy rail infrastructure, featuring the Chicago Milwaukee St Paul and Pacific and Northern Pacific railroads. The map reveals the intricate network of irrigation necessary for Gallatin Valley ranching, documented through labels like the Lower Jefferson Ditch and Buttleman Ditch. Rural life is anchored by family-named landmarks and local institutions, including the Silver Sage Ranch, Jefferson Sch, and the Mt Green Cem near the town of Willow Creek. Industrial activity is noted at the Copper City open pit mine and various gravel operations, providing a window into the regional economy before modern interstate development.