MBMG-107340
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 | |
|---|---|---|
| 64.0-89.0 ft | 4.0 in diameter pvc casing | |
| -1.5-70.0 ft | 6.0 in diameter steel casing | |
| 62.0-68.0 ft | 4.0 in diameter torch cuts screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-4.0 ft | unknown | TOPSOIL |
| 4.0-10.0 ft | unknown | BOULDERS |
| 10.0-89.0 ft | unknown | CLAY & VOLCANIC ASH |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-107340 Site Number 107340 Site Type WELL Lat/Long (NAD83) 45.674, -112.2616 Well Depth 89 Feet Elevation (NAVD88) 4546.94 ft Latitude 45.67402621 Longitude -112.2616318 Local Aquifer Name 120SDMS SEDIMENTS (TERTIARY) (None) National Aquifer Name Northern Rocky Mountains Intermontane Basins aquifer systems (S100NRMTIB) Aquifer Type CONFINED Water-Level Well Type Trend Water-Level Well Characteristics Known Changes 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 36.22 33.72 31.07 1992-09-25 2026-03-30 156 33.5 36.00 0.0 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 Mar 36.00 35.99 34.97 34.41 33.98 33.86 33.62 28 28 Jun 34.44 34.33 33.15 32.86 32.57 32.34 32.22 25 25 Sep 35.69 34.72 33.80 32.96 32.41 32.17 31.07 26 26 Dec 36.04 35.87 34.75 34.23 33.89 33.74 33.54 29 29 Statistics Calculated 2026-05-16 -
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