
Rio Grande Rio Bravo serves as the focal point for this international border region, where the waters define the boundary between Starr County, Texas, and Tamaulipas, Mexico. The landscape is heavily shaped by an intricate irrigation system designed to support agriculture in the arid valley, featuring works like the Canal Principal Guillermo Rode, Canal Santa Gertrudis, and Canal Veintiocho. These waterways connect scattered ranching and farming settlements, including Valadeces and Los Villarreal, reflecting the deep-rooted Hispanic heritage and land-use patterns of the Lower Rio Grande Valley.
43 named features on this map. Tap any name to fly to it.
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This is the sole edition of this map. No revisions or reprints were ever made.
1949 · Mc Allen
USGS Topo · 1:250,000
1954 · McAllen
USGS Topo · 1:250,000
1956 · Garcias
USGS Topo · 1:62,500
1956 · Los Ebanos
USGS Topo · 1:62,500
1956 · Escobares
USGS Topo · 1:62,500
1957 · Mc Allen
USGS Topo · 1:250,000
1962 · McAllen
USGS Topo · 1:250,000
1965 · Rio Grande City South
USGS Topo · 1:24,000
1965 · La Grulla
USGS Topo · 1:24,000
1965 · Sullivan City
USGS Topo · 1:24,000