MBMG-131122
Montana Bureau of Mines and Geology
Located in Beaverhead 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 | |
|---|---|---|
| -1.9-158.5 ft | 6.0 in diameter steel casing | |
| 130.0-135.0 ft | 6.0 in diameter perforated casing screen | |
| 145.0-150.0 ft | 6.0 in diameter perforated casing screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-35.0 ft | unknown | GRAVELLY SAND |
| 35.0-40.0 ft | unknown | MIXED LARGE GRAVEL/GROUND-UP COBBLES & LT-M-C SAND WITH TRACE OF SILT |
| 40.0-60.0 ft | unknown | GRAVELLY SAND W/SOME SILT/CLAY |
| 60.0-79.0 ft | unknown | MIXED SILT AND F-M-C SAND W/MINOR GRAVEL |
| 79.0-91.0 ft | unknown | GRAVELLY SAND W/INTERMITTENT SILTY INTERVALS |
| 91.0-100.0 ft | unknown | SILTY SAND W/MINOR GRAVEL; SOME INTERVALS ENTIRELY SILT;- HIT WATER AT 95 FEET. |
| 100.0-110.0 ft | unknown | MIXED FINE GRAVEL AND SAND W/MINOR SILT 100 GPM |
| 110.0-120.0 ft | unknown | PREDOMINANTLY GRAVEL/GROUND-UP COBBLES W/MINOR SAND- 125 GPM CLEAN WATER- NO SILT |
| 120.0-153.0 ft | unknown | CLEAN GRAVELLY COARSE SAND |
| 153.0-154.0 ft | unknown | CLAYEY SAND/GRAVEL |
| 154.0-158.5 ft | unknown | GRAVELLY SAND W/MINOR CLAY |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-131122 Site Number 131122 Site Type WELL Lat/Long (NAD83) 45.0927, -112.6034 Well Depth 158.5 Feet Elevation (NAVD88) 5486.152 ft Latitude 45.092699105556 Longitude -112.603408 Local Aquifer Name 120SNGR (None) National Aquifer Name Northern Rocky Mountains Intermontane Basins aquifer systems (S100NRMTIB) Aquifer Type UNCONFINED Water-Level Well Type Trend Water-Level Well Characteristics Background Water Quality Network 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 95.82 62.60 16.50 1992-11-18 2026-03-31 2700 33.3 70.17 17.24 Statistics Calculated 2026-05-20 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 74.74 74.20 69.31 62.88 53.16 49.69 49.44 10 10 Feb 73.79 72.54 69.37 63.14 53.34 40.35 35.94 12 12 Mar 73.49 70.45 69.39 64.29 58.53 52.18 48.56 28 28 Apr 72.27 71.58 68.79 61.40 53.42 47.95 39.97 16 16 May 72.80 72.52 71.06 65.37 54.84 46.25 39.57 14 14 Jun 74.43 73.13 69.61 61.71 54.08 47.86 16.50 29 29 Jul 74.59 72.85 67.58 57.08 40.50 24.86 17.13 14 14 Aug 86.13 81.44 68.89 65.98 45.68 26.94 21.93 12 12 Sep 93.36 73.28 69.47 63.95 53.63 40.90 25.31 29 29 Oct 75.76 75.68 74.13 66.96 54.29 31.50 28.25 11 11 Nov 73.18 70.46 67.63 55.04 46.75 38.72 30.13 16 16 Dec 74.71 69.80 68.07 63.14 56.96 48.35 33.14 28 28 Statistics Calculated 2026-05-20 -
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