|
Montana Geothermal Sites: Ennis
SUMMARY INFORMATION:
|
|
| AKA: Thexton’s Hot Springs Location: N 45.3702 W 111.7252 Nearest town: 2 miles N of Ennis County: MADISON Depth: Spring Temperature: 193° F Flow: 30-300 gpm TDS: 966 (mg/L) Site ID: MGEOT293 LOCATE AND VIEW VIA NRIS DIGITAL MAP LOCATOR: Allows topos to be resized and access to aerial photographs. |
CHEMISTRY (ppm, mg/L) Site name: ENNIS Temp: 87.0º C TDS: 966 pH: 7.84 Sodium: 314 Potassium: 14.9 Calcium: 5.0 Magnesium: 0.2 Iron: 0.01 Lithium: 220 Boron: 620.00 SiO2: 108.00 Sulfate: 203 Chloride: 111 Fluoride: 10.9 |
Ennis Hot Springs has the hottest surface spring water in the state. The springs rise from the foot of an alluvial gravel bench. Water is now provided by a 1981 MBMG well completed to 1,220 ft, the bottom temperature was 202 F. Free flow from the wellhead is about 25 gpm. The USGS completed a vigorous geologic evaluation in the area with numerous test wells from 1975 to 1980.
