MBMG-108471
Montana Bureau of Mines and Geology
Located in Madison 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 | |
|---|---|---|
| -1.0-41.0 ft | 7.0 in diameter steel casing | |
| 36.0-40.0 ft | 7.0 in diameter perf screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-1.0 ft | unknown | TOPSOIL |
| 1.0-3.0 ft | unknown | TOPSOIL AND GRAVEL |
| 3.0-9.0 ft | unknown | GRAVEL |
| 9.0-24.0 ft | unknown | GRAVEL AND CLAY (TRACE OF WATER) |
| 24.0-37.0 ft | unknown | SAND |
| 37.0-41.0 ft | unknown | GRAVEL |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-108471 Site Number 108471 Site Type WELL Lat/Long (NAD83) 45.3787, -112.1643 Well Depth 41 Feet Elevation (NAVD88) 4999.022 ft Latitude 45.378701 Longitude -112.164274 Local Aquifer Name 110SNGR (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 30.92 28.36 13.81 2000-04-26 2026-01-22 2337 25.8 30.23 36.36 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 30.45 30.44 30.27 29.88 29.45 29.36 29.35 10 10 Mar 30.88 30.81 30.78 30.58 30.27 29.95 29.92 23 23 Apr 30.81 30.77 30.52 30.14 29.74 29.55 29.53 12 12 May 30.59 30.58 30.20 28.34 25.19 19.87 18.72 11 11 Jun 26.35 26.23 25.34 22.25 19.91 17.38 14.69 24 24 Jul 26.57 26.52 25.78 24.29 19.07 16.62 16.51 10 10 Aug 25.32 25.22 24.69 23.65 20.09 15.28 14.75 13 13 Sep 26.52 25.63 23.86 21.97 19.41 16.54 15.27 21 21 Oct 28.17 28.15 27.90 27.48 23.37 21.92 21.85 10 10 Nov 29.32 29.32 29.18 28.78 27.18 26.17 26.06 10 10 Dec 30.08 29.95 29.70 29.39 28.74 28.40 27.75 25 25 Statistics Calculated 2026-05-18 -
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