MBMG-154584
Montana Bureau of Mines and Geology
Located in Granite 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 | |
|---|---|---|
| -2.0-60.0 ft | 6.0 in diameter steel casing | |
| 40.0-48.0 ft | 6.0 in diameter holte perforator slots screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-1.0 ft | unknown | TOPSOIL |
| 1.0-6.0 ft | unknown | PINKISH-BROWN SILT TRACE GRAVEL |
| 6.0-30.0 ft | unknown | DRY PINKISH-BROWN SILTY SAND GRAVEL & COBBLES |
| 30.0-39.0 ft | unknown | WET RED-BROWN CLAY & GRAVELLY CLAY |
| 39.0-48.0 ft | unknown | SILTY GRAVEL SOME WATER |
| 48.0-60.0 ft | unknown | BROWN STIFF SILT & SOFT CLAY |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-154584 Site Number 154584 Site Type WELL Lat/Long (NAD83) 46.6211, -113.2067 Well Depth 60 Feet Elevation (NGVD29) 4245.0 ft Latitude 46.62112925 Longitude -113.2066994 Local Aquifer Name 120SNGR, SAND AND GRAVEL (TERTIARY) (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 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 39.33 26.81 13.05 1995-12-26 2026-04-08 4416 30.3 35.73 11.76 Statistics Calculated 2026-05-18 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 36.32 34.47 27.91 25.05 24.09 23.05 21.59 17 17 Feb 37.69 36.25 30.92 27.50 26.73 25.14 23.76 15 15 Mar 38.39 35.57 32.07 29.47 28.65 28.01 25.73 25 25 Apr 38.41 36.53 33.77 31.18 30.50 29.26 28.88 16 16 May 39.12 38.62 35.91 33.60 32.46 30.54 30.18 14 14 Jun 36.90 35.73 33.99 31.63 28.53 24.34 23.66 25 25 Jul 35.20 33.08 27.91 26.97 23.47 20.86 20.78 15 15 Aug 33.47 29.07 24.50 22.66 19.67 17.86 15.84 15 15 Sep 32.40 26.25 22.57 19.38 15.53 14.24 13.58 22 22 Oct 32.62 27.80 22.97 20.15 17.70 14.25 13.63 18 18 Nov 33.16 31.30 24.50 20.70 18.09 16.52 16.48 13 13 Dec 34.55 31.41 26.27 23.46 21.81 19.32 18.92 23 23 Statistics Calculated 2026-05-18 -
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