
Dull Flats sits at the heart of this South Texas landscape, where the drainage patterns of La Salle County are meticulously documented. The Frio River and its accompanying Cayman Slough define the eastern portion of the quadrangle, while a network of seasonal watercourses like Cibolo Cr, Nogate Cr, and Yeager Cr carve through the brush country. The map illustrates a ranching-driven geography marked by numerous man-made water features, including TCU Tank, Rock Hill Tank, and Salt Well Tank. These landmarks, along with local routes such as El Jardin Rd and Koon Hill Rd, provide essential reference points for understanding the modern distribution of resources and land use in this arid region of the Rio Grande Plain.
16 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.
1929 · Cotulla
USGS Topo · 1:125,000
1940 · Cotulla
USGS Topo · 1:62,500
1942 · Fowlerton
USGS Topo · 1:62,500
1942 · Dilley
USGS Topo · 1:62,500
1953 · Crystal City
USGS Topo · 1:250,000
1955 · Crystal City
USGS Topo · 1:250,000
1956 · Hindes
USGS Topo · 1:62,500
1956 · Fowlerton
USGS Topo · 1:62,500
1961 · Crystal City
USGS Topo · 1:250,000
1968 · Crystal City
USGS Topo · 1:250,000