MBMG-280978
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 | |
|---|---|---|
| -2.0-100.0 ft | 8.0 in diameter a53b steel casing | |
| -2.0-158.0 ft | 4.0 in diameter pvc-sched 160 casing | |
| 148.0-158.0 ft | 4.0 in diameter screen-continuous-pvc screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-2.0 ft | unknown | TOPSOIL |
| 2.0-20.0 ft | unknown | SILT WITH SOME MEDIUM GRAVEL |
| 20.0-35.0 ft | unknown | TAN FINE SAND AND SILT WITH SOME MEDIUM GRAVEL |
| 35.0-45.0 ft | unknown | FINE SAND WITH SOME SILT AND CLAY |
| 45.0-70.0 ft | unknown | SILT AND CLAY WITH SOME SAND AND GRAVEL |
| 70.0-90.0 ft | unknown | SILT AND SAND WITH SOME MEDIUM GRAVEL |
| 90.0-95.0 ft | unknown | SAND AND GRAVEL |
| 95.0-105.0 ft | unknown | GRAVEL WITH SOME SAND |
| 105.0-120.0 ft | unknown | SEMI-LITHOFIED MUDSTONE WITH SOME MEDIUM SAND |
| 120.0-125.0 ft | unknown | SEMI-LITHOFIED MUDSTONE WITH SOME SAND AND GRAVEL |
| 125.0-140.0 ft | unknown | SEMI-LITHOFIED MUDSTONE |
| 140.0-145.0 ft | unknown | MEDIUM TO COARSE SAND WITH LITTLE MUDSTONE |
| 145.0-160.0 ft | unknown | FINE TO MEDIUM SAND |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-280978 Site Number 280978 Site Type WELL Lat/Long (NAD83) 45.8344, -112.0478 Well Depth 158 Feet Elevation (NAVD88) 4441.0 ft Latitude 45.834370505 Longitude -112.047768578 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 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 99.25 95.39 89.05 2015-02-13 2026-04-20 51 11.2 95.69 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 -
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