
Water management and high-desert ranching define this landscape in Johnson County, where the sprawling Lake De Smet meets an intricate network of irrigation systems. The reliance on seasonal runoff is evident in the numerous gravity-fed waterways like the Pride of the Valley Ditch, Mowry Basin Ditch, and Yarwood Ditch that crisscross the terrain to support local agriculture. The map reveals a complex infrastructure of storage and transport, including Mowry Reservoir, Sparks Reservoir, and the Lake De Smet Canal. These features highlight the transformation of the arid Mowry Basin into a productive ranching district. Local transport is anchored by routes such as Lott Ranch Rd and French Creek Rd, which provide access to family-named landmarks and remote stock-watering points throughout the township blocks of T52N and T51N.
68 named features on this map. Tap any name to fly to it.
Don’t see what you’re looking for? This feature index may not catch every label — zoom into the map to look around manually.
This is the sole edition of this map. No revisions or reprints were ever made.
1900 · Fort McKinney
USGS Topo · 1:125,000
1903 · Fort McKinney
USGS Topo · 1:125,000
1909 · Sheridan
USGS Topo · 1:125,000
1911 · Sheridan
USGS Topo · 1:125,000
1955 · Sheridan
USGS Topo · 1:250,000
1958 · Sheridan
USGS Topo · 1:250,000
1962 · Sheridan
USGS Topo · 1:250,000
1967 · Lake De Smet West
USGS Topo · 1:24,000
1967 · Hunter Mesa
USGS Topo · 1:24,000
1967 · Stone Mountain
USGS Topo · 1:24,000