SOUTH CONCHO RIVER
SOUTH CONCHO RIVER. The South Concho River rises just east of Eldorado in central Schleicher County (at 30°51' N, 100°35' W) and flows northeast for fifty-one miles to its mouth on the North Concho River, in San Angelo in Tom Green County (at 31°27' N, 100°25' W). It was dammed in the early 1960s to form part of the Twin Buttes Reservoir. The surrounding flat to rolling terrain has local shallow depressions and is surfaced by shallow clay and sandy loams that support water-tolerant hardwoods and conifers along the river bank and scrub brush, cacti, and grasses beyond.