
Hydraulic engineering and irrigation infrastructure define this South Texas landscape, where the Monte Alto Reservoir Unit No 1 and Monte Alto Reservoir Unit No 2 dominate the center of the sheet. The area is marked by a complex system of elevated ditches and levees, including the Main Branch and the Main Supply Canal, reflecting the region's intensive agricultural development during the mid-20th century.
20 named features on this map. Tap any name to fly to it.
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1922 · La Sal Vieja
USGS Topo · 1:62,500
1929 · Santa Rosa
USGS Topo · 1:24,000
1933 · Santa Rosa
USGS Topo · 1:31,680
1939 · Linn
USGS Topo · 1:62,500
1949 · Mc Allen
USGS Topo · 1:250,000
1953 · Brownsville
USGS Topo · 1:250,000
1954 · McAllen
USGS Topo · 1:250,000
1956 · La Sal Vieja
USGS Topo · 1:24,000
1956 · Santa Rosa
USGS Topo · 1:24,000
1956 · Yturria
USGS Topo · 1:24,000