
Ridges Basin serves as the central focal point of this terrain south of Durango, where the landscape is defined by a series of dramatic canyons and high ridges. The Animas River flows through the southeastern corner of the map, accompanied by the Citizens Animas Ditch, reflecting the long-standing agricultural water management systems vital to La Posta. The area's complex topography is marked by notable heights like Basin Mtn and Bridge Timber Mtn, which overlook a network of drainage features including Wildcat Canyon and Goat Canyon. Numerous reservoirs, such as Herrera Reservoir, Montoya Reservoir, and Dads Reservoir, are tucked into the drainages of McCullogh Canyon and Sawmill Canyon, illustrating the reliance on catchment for ranching or irrigation in this arid upland environment.
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This is the sole edition of this map. No revisions or reprints were ever made.
1895 · La Plata
USGS Topo · 1:62,500
1897 · La Plata
USGS Topo · 1:62,500
1898 · Durango
USGS Topo · 1:62,500
1899 · La Plata
USGS Topo · 1:62,500
1907 · Durango
USGS Topo · 1:62,500
1908 · Ignacio
USGS Topo · 1:125,000
1908 · Durango
USGS Topo · 1:62,500
1908 · La Plata
USGS Topo · 1:62,500
1913 · Red Mesa
USGS Topo · 1:62,500
1924 · Ignacio
USGS Topo · 1:125,000