The initial flow of the major streams within the seven-county area comes from seeps and springs, primarily from the Edwards-Trinity aquifer. Groundwater in the area is generally available from the strata of Hickory Sandstone, Ellenburger Limestone, Hensell Sand and Edwards Limestone.
Did You Know?
Lyndon Johnson's first career was as a teacher and principal of a Mexican-American school in Cotulla, Texas. He later taught debate in Houston. Lyndon B. Johnson National Historical Park