Holcomb Reservoir and its associated Holcomb Reservoir Dam dominate the northwestern corner of this South Texas landscape, where the seasonal flow of the Frio River and Elm Creek shapes the ranching geography. The terrain is defined by low-lying drainages and isolated high points like Pilot Knob and the English Hills. This environment is heavily managed for water storage, as evidenced by a dense network of earthen tanks used for livestock and irrigation, including Garden Tank, Willow Tank, and Tutiga Tank.
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This is the sole edition of this map. No revisions or reprints were ever made.
1925 · Pearsall 1-b
USGS Topo · 1:48,000
1925 · Pearsall 1-c
USGS Topo · 1:48,000
1927 · Pearsall
USGS Topo · 1:62,500
1928 · Frio Town
USGS Topo · 1:62,500
1942 · Divot
USGS Topo · 1:62,500
1953 · Crystal City
USGS Topo · 1:250,000
1954 · San Antonio
USGS Topo · 1:250,000
1955 · Crystal City
USGS Topo · 1:250,000
1956 · Divot
USGS Topo · 1:62,500
1957 · San Antonio
USGS Topo · 1:250,000