MBMG-3977
Montana Bureau of Mines and Geology
Located in Blaine County, Montana, this groundwater monitoring location is associated with a water well in the Alluvial aquifers.
Well Construction
| Depth | Description | |
|---|---|---|
| -2.0-65.0 ft | 6.0 in diameter steel casing | |
| 60.0-65.0 ft | 6.0 in diameter torch cuts screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-5.0 ft | unknown | SOIL ZONE GRADING DOWNWARD INTO CLAY W/SUBROUNDED PEBBLES & COBBLES BY 5'. |
| 6.0-10.0 ft | unknown | CLAY W/OCCASIONAL ROCKS & PEBBLES. |
| 10.0-15.0 ft | unknown | CLAY W/MUCH VERY-COARSE SAND & SOME GRAVEL & PEBBLES 11-12'-COARSE SAND AT 12'- SAND & GRAVEL 13-15'. |
| 15.0-30.0 ft | unknown | YELLOW-BROWN SUBANGULAR TO SUBROUNDED GRAVEL & SAND. |
| 30.0-40.0 ft | unknown | VERY SANDY W/LITTLE GRAVEL 34 TO 36 FT. ALL COARSE TO VERY COARSE SAND W/NO GRAVEL-WATER AT ABOUT 39 FT. |
| 40.0-50.0 ft | unknown | COARSE YELOW-BROWN SAND & GRAVEL. |
| 50.0-55.0 ft | unknown | COARSE TO MEDIUM GRAVEL & SAND W/SOME CLAY. |
| 55.0-65.0 ft | unknown | SAND & GRAVEL TO 65' |
| 66.0-68.0 ft | unknown | BROWN STICKY CLAY BECOMING DARK BLUE GRAY CLAY AT 68'. |
| 68.0-79.0 ft | unknown | DARK-GRAY-BLACK SHALE. |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-3977 Site Number 3977 Site Type WELL Lat/Long (NAD83) 48.8292, -108.5641 Well Depth 79 Feet Elevation (NAVD88) 3105.78 ft Latitude 48.82924814 Longitude -108.5641232 Local Aquifer Name 121FLXV, FLAXVILLE GRAVELS (PLIOCENE-MIOCENE) (None) National Aquifer Name Alluvial aquifers (N100ALLUVL) 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 49.48 45.75 41.23 1985-08-18 2026-04-08 6660 40.7 45.44 52.63 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 49.34 48.57 47.00 45.87 44.86 43.12 42.09 35 35 Feb 49.27 48.41 46.85 45.87 45.02 42.82 41.86 33 33 Mar 49.20 48.39 47.40 45.73 44.90 43.31 41.77 36 36 Apr 49.09 48.23 47.11 45.54 44.78 43.42 41.63 37 37 May 48.94 48.43 47.48 45.50 44.61 43.01 41.53 35 35 Jun 48.88 48.23 47.04 45.36 44.42 42.88 41.46 37 37 Jul 48.92 48.19 47.59 45.63 44.54 43.13 41.54 38 38 Aug 49.12 48.36 47.50 45.66 44.64 42.75 41.31 39 39 Sep 49.30 48.59 47.64 45.83 44.96 44.14 41.65 37 37 Oct 49.39 48.70 47.47 45.87 45.08 43.74 41.74 38 38 Nov 49.47 48.78 47.71 45.88 45.03 43.25 41.85 36 36 Dec 49.44 48.82 47.01 45.86 45.21 43.78 42.20 34 34 Statistics Calculated 2026-05-16 -
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