MBMG-128327
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 | 6.0 in diameter steel casing | |
| 10.0-170.0 ft | 4.0 in diameter pvc casing | |
| 140.0-160.0 ft | 4.0 in diameter perforated casing screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-4.0 ft | unknown | TOPSOIL |
| 5.0-24.0 ft | unknown | CLAY |
| 24.0-44.0 ft | unknown | SOFT SANDY CLAY |
| 44.0-170.0 ft | unknown | SOFT CLAY AND VERY HARD GRANITE |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-128327 Site Number 128327 Site Type WELL Lat/Long (NAD83) 45.3144, -111.7857 Well Depth 170 Feet Elevation (NAVD88) 5332.422 ft Latitude 45.314366252778 Longitude -111.785712844444 Local Aquifer Name 500GNSC (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 168.76 94.31 34.36 2001-01-02 2025-12-31 2944 24.9 118.36 31.579 Statistics Calculated 2026-05-19 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 113.11 111.37 105.41 89.86 61.16 51.05 44.43 14 14 Feb 102.47 102.26 99.34 88.60 80.77 61.15 59.49 10 10 Mar 93.75 93.53 89.82 76.47 69.38 51.48 47.86 19 19 Apr 87.11 86.24 76.41 55.62 43.43 38.05 34.36 15 15 May 85.44 84.50 77.25 67.38 50.66 42.99 40.92 12 12 Jun 101.47 98.14 91.61 81.35 66.26 48.39 47.36 21 21 Jul 125.36 124.38 115.52 97.11 75.74 50.77 48.27 14 14 Aug 159.24 156.22 145.40 130.13 113.67 107.00 106.70 13 13 Sep 168.76 160.75 150.03 140.70 127.55 104.46 80.25 21 21 Oct 154.42 153.22 145.11 136.35 114.21 79.72 72.35 13 13 Nov 142.84 142.23 134.51 121.11 110.9 78.23 72.52 15 15 Dec 131.09 129.27 121.87 108.06 101.3 75.94 51.39 18 18 Statistics Calculated 2026-05-19 -
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