
The winding Rio Grande defines the international border on this 2002 survey of the Lower Rio Grande Valley. The landscape is characterized by its complex hydrology, featuring abandoned river meanders known locally as resacas, including Resaca De Los Fresnos and Resaca Del Rancho Viejo. Agricultural and conservation efforts dominate the area, with Reservoir No 1 and Reservoir No 2 providing water for irrigation, while the Lower Rio Grande Valley National Wildlife Refuge preserves critical habitat along the river banks.
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This is the sole edition of this map. No revisions or reprints were ever made.
1929 · Rio Hondo
USGS Topo · 1:24,000
1929 · Harlingen
USGS Topo · 1:24,000
1929 · Santa Maria
USGS Topo · 1:24,000
1929 · La Feria
USGS Topo · 1:24,000
1929 · La Paloma
USGS Topo · 1:24,000
1930 · West Brownsville
USGS Topo · 1:24,000
1930 · Barreda
USGS Topo · 1:24,000
1932 · Rio Hondo
USGS Topo · 1:31,680
1932 · Harlingen
USGS Topo · 1:31,680
1936 · La Feria
USGS Topo · 1:31,680