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1984 Map of Cowan Reservoir

Name: 1984 Topographic Map of Cowan Reservoir
Creator: U.S. Geological Survey
Published: 1984
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1984

About this map

The Rocky Boys Indian Reservation dominates the center of this northern Montana landscape, where the terrain shifts from the high, distinctive profile of Square Butte down into a complex network of drainage systems. The survey captures the border region between Hill Co and Chouteau Co, documenting a watershed defined by the winding course of Big Sandy Creek and the seasonal flows of Sand Coulee.

Water management is central to the area's geography, evidenced by the Dry Fork Reservoir and the eponymous Cowan Reservoir tucked into the southern hills. These features, along with Boxelder Creek and Duck Creek, outline a ranching and agricultural landscape shaped by the necessity of irrigation. The map provides a clear record of the physical boundaries and water resources as they were managed in the late 1970s and early 1980s.