Four temperature-gradient drill holes drilled by Phillips Petroleum Co. in an area about 7 km west of Valmy (SMU; Sass and others, 1999) to depths of 18-55 m encountered temperatures up to 24.4ºC and high temperature gradients (to 444ºC/km; GeothermEx, 2004). No active hot springs or fumaroles are known. Location: 40.77ºN, 117.21ºW.