Several springs and shallow wells at San Jacinto Ranch 13 km north of Contact are hot. Spring temperatures are reported to range from 26-64°C (Miller and others, 1953; Mariner and others 1983, p. 98). A 26ºC spring had estimated reservoir temperatures of 26ºC and 44ºC on silica and Na-K-Ca geothermometers, respectively (Mariner and others 1983, p. 105). A major fault is present south of the springs (Stewart and Carlson, 1978) and may be present at the springs below the alluvium.