
The Rio Grande carves a complex, serpentine path along the border between Texas and Tamaulipas, defining the landscape of this 1930 survey. The intricate hydrology of the region is marked by numerous bancas—cut-off river loops—including Guerro Banco and Trevino Canales Banco, alongside the ancient distributary channels known as resacas. The Resaca del Rancho Viejo and Resaca de la Palma dominate the interior drainage, reflecting the unique alluvial delta environment before modern water control extensively altered the flow.
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This is the sole edition of this map. No revisions or reprints were ever made.
1929 · La Paloma
USGS Topo · 1:24,000
1930 · Los Fresnos
USGS Topo · 1:24,000
1930 · Barreda
USGS Topo · 1:24,000
1930 · East Brownsville
USGS Topo · 1:24,000
1936 · Los Fresnos
USGS Topo · 1:31,680
1936 · West Brownsville
USGS Topo · 1:31,680
1936 · Barreda
USGS Topo · 1:31,680
1936 · East Brownsville
USGS Topo · 1:31,680
1936 · La Paloma
USGS Topo · 1:31,680
1936 · Southmost
USGS Topo · 1:31,680