1983 Map of Johnson Reservoir NE

About this map

Thirteenmile Creek and its many branches dominate this Dawson County landscape, carved out by centuries of drainage across the eastern Montana plains. This 1983 provisional survey, based on aerial photography from the mid-1970s, illustrates the complex hydrology of the region before modern development or intensive infrastructure. The network of waterways includes the South Fork Thirteenmile Creek and Sullivan Creek, showing the natural flow patterns toward larger basins. To the north and south, West Fork Pasture Creek and the headwaters of North Fork Deer Creek define the boundaries of this prairie terrain. The map's unimproved roads and trails follow the contours of the land, tracing the same routes used by ranchers and early travelers to navigate between the Lower Sevenmile Creek drainage and the surrounding ridges.