The Rio Grande defines the international border and the primary geographic character of this region along the southern edge of Texas. This 2013 survey documents a segment of the river's winding path, illustrating the shifting fluvial landscape and the administrative boundaries that track its historical movements. One such boundary, the Valadeces Banco Number 130, highlights the complex land management and riparian history inherent to the river's changing course. The terrain is marked by a network of drainage channels and limited road infrastructure, reflecting a landscape defined more by its natural hydrology and international frontier status than by dense settlement.
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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