The Madison River dominates this landscape along the border of Gallatin and Madison counties, carving through high-elevation terrain defined by complex water management systems. An extensive network of irrigation infrastructure, including the Dell Ditch, Hutchison Ditch, and Sloan Ditch, illustrates the area's agricultural reliance on diverted river water. These human-made channels follow the contours of the river valley, supporting the ranching operations that have long shaped this part of Montana.
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1888 · Three Forks
USGS Topo · 1:250,000
1894 · Three Forks
USGS Topo · 1:250,000
1895 · Three Forks
USGS Topo · 1:250,000
1947 · Bozeman
USGS Topo · 1:250,000
1948 · Bozeman
USGS Topo · 1:250,000
1949 · Anceney
USGS Topo · 1:62,500
1949 · Manhattan
USGS Topo · 1:62,500
1949 · Norris
USGS Topo · 1:62,500
1950 · Three Forks
USGS Topo · 1:62,500
1951 · Norris
USGS Topo · 1:62,500