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1964 Map of Threemile Reservoir

Name: 1964 Topographic Map of Threemile Reservoir
Creator: U.S. Geological Survey
Published: 1967
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1967

About this map

The Fort Belknap Indian Reservation boundary defines the northern portion of this 1964 landscape, where the meandering path of the Milk River created a complex system of oxbows and natural irrigation. To support agriculture in this arid region of Blaine County, an extensive network of man-made waterways was developed, including the Milk River Canal A, North Main Canal A, and Main Canal A. These canals illustrate the mid-century infrastructure required to divert river water across the plains.

Evidence of local community and industry is found near the Threemile Reservoir, where the Sacred Heart Ch stands alongside several Gravel Pits and a Pumping Sta. The terrain transitions from the river lowlands into the dissected breaks of Threemile Creek and Spring Creek, while the southern reaches are marked by White Bear Creek. This survey captures the intersection of tribal lands, water management engineering, and the small rural outposts of the Montana prairie.