MBMG-219909
Montana Bureau of Mines and Geology
Located in Powell County, Montana, this groundwater monitoring location is associated with a water well in the Northern Rocky Mountains Intermontane Basins aquifer systems.
Well Construction
| Depth | Description | |
|---|---|---|
| -3.0-96.0 ft | 6.0 in diameter a53a steel casing | |
| 75.0-80.0 ft | 6.0 in diameter holte perforator slots screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-3.0 ft | unknown | SOIL |
| 3.0-12.0 ft | unknown | COARSE- AND MEDIUM SAND, PEBBLES, AND COBBLES; ROUNDED QUARTZITE; RIG BOUNCES AND GRINDS THROUGH 2-3 FOOT BEDS OF GRAVEL |
| 12.0-17.0 ft | unknown | COARSE AND MEDIUM GRAINED SANDS , PEBBLES, AND COBBLES; ROUNDED QUARTZITE; MOIST |
| 17.0-20.0 ft | unknown | BROWN CLAY; UNLITHIFIED |
| 20.0-37.0 ft | unknown | BROWN CLAY AND SILTSTONE; WEAKLY CONSOLIDATED |
| 37.0-38.0 ft | unknown | BROWN SILTY VERY FINE GRAINED SANDSTONE, SOME GRANULE GRAVEL |
| 38.0-40.0 ft | unknown | BROWN COARSE GRAINED SAND AND PEBBLES |
| 40.0-50.0 ft | unknown | BROWN VERY FINE GRAINED SANDY CLAY, FEW PEBBLES |
| 50.0-60.0 ft | unknown | BROWN VERY FINE GRAINED SAND CLAY, SILTY CLAY, AND SANDY SILT. MAKES A FEW GPM OF WATER BETWEEN 57 AND 60 FEET |
| 60.0-70.0 ft | unknown | BROWN CLAY AND SILTY CLAY |
| 70.0-75.0 ft | unknown | BROWN HARD SILTY CLAY AND SANDY CLAY |
| 75.0-80.0 ft | unknown | DARK BROWN GRANULE GRAVEL, SUBANGULAR COARSE GRAINED SAND, AND PEBBLES AND COBBLE PIECES; ROUNDED QUARTZ GRAINS; COMMON QUARTZITE AND ARGILLITE GRAINS; MAKING 20 GPM |
| 80.0-96.0 ft | unknown | DARK BROWN SANDY CLAY AND SILT; FEW COARSE GRAINED SAND BEDS WITH BROKEN PEBBLES; VERY LITTLE THEN NO WATER PRODUCED FROM INTERVAL; BLEW FOR 10 MINUTES, NO WATER PRODUCED |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-219909 Site Number 219909 Site Type WELL Lat/Long (NAD83) 46.4441, -112.7263 Well Depth 96 Feet Elevation (NAVD88) 4464.8 ft Latitude 46.44413139 Longitude -112.72632665 Local Aquifer Name 120SNGR, SAND AND GRAVEL (TERTIARY) (None) National Aquifer Name Northern Rocky Mountains Intermontane Basins aquifer systems (S100NRMTIB) Aquifer Type CONFINED Water-Level Well Type Trend Water-Level Well Characteristics Background Water Quality Network MONTANA GWIC Additional info Link 1 -
Activity Start Date Activity Start Time Characteristic Name Measure Value Units Detection Limit Value Type Sample Fraction Method Name Analytical Method System Sample Method ID Sample Method ID Context Sample Method Name Activity Type Code Data Provided By -
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How do we calculate statistics?
Overall Water Level Statistics (Depth to water, feet below land surface) Lowest Water Level Median Water Level Highest Water Level First Measurement Date Last Measurement Date Number of Measurements Years of Record Latest Value Latest Percentile 12.75 11.26 8.44 2005-06-02 2026-04-21 6915 20.8 11.80 9.091 Statistics Calculated 2026-05-16 Monthly Water Level Statistics (Depth to water, feet below land surface) Month Lowest Median 10th Percentile 25th Percentile 50th Percentile 75th Percentile 90th Percentile Highest Median Number of Measurements Years of Record Jan 11.73 11.68 11.62 11.43 11.22 11.04 10.87 20 20 Feb 11.77 11.65 11.58 11.49 11.25 10.97 10.89 19 19 Mar 11.97 11.70 11.52 11.38 11.21 10.78 10.68 18 18 Apr 11.92 11.79 11.51 11.23 11.05 10.53 9.82 21 21 May 11.88 11.74 11.38 11.08 10.94 9.9 9.36 20 20 Jun 12.51 10.75 10.52 10.14 9.69 9.15 9.12 21 21 Jul 12.50 11.61 11.16 10.86 10.45 10.0 9.84 21 21 Aug 12.32 12.15 11.63 11.41 11.16 10.96 10.81 21 21 Sep 12.15 11.91 11.67 11.38 11.16 10.80 10.75 21 21 Oct 11.83 11.51 11.33 11.26 10.94 10.60 10.49 21 21 Nov 11.53 11.40 11.35 11.26 10.99 10.69 10.60 20 20 Dec 11.58 11.56 11.48 11.33 11.02 10.93 10.93 19 19 Statistics Calculated 2026-05-16 -
Operated in cooperation with:
