The Panaca Warm Spring is in the center N½ Sec. 4, T2S, R68E just north of the town of Panaca. It has reported temperatures of 29-31°C, and flow rates ranging from 8,000 to 28,000 L/min. Panaca is along the northeast extension of the Menard Lake Fault (Tschanz and Pampeyan, 1970, plate 3), which follows Meadow Valley Wash. The water issues from a fault contact between alluvium and Paleozoic limestone. The town of Panaca uses the spring as its water supply (Carpenter, 1915; Phoenix, 1948a; Rush, 1964). In addition, the town of Panaca maintain a pond, which has a temperature of approximately 28ºC, for public bathing (Williams, 1996, p. 56). Hot water (21-23°C) occurs in a least six wells north and south of the spring, in Secs. 32 and 33, T1S, R68E, and Secs. 5, 7, and 8, T2S, R68E.