MBMG-131577
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 | |
|---|---|---|
| 0.0-63.0 ft | 1.3 in diameter galv pipe casing |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-5.0 ft | unknown | TUFF |
| 5.0-10.0 ft | unknown | GRAVEL |
| 10.0-20.0 ft | unknown | GRAVEL |
| 20.0-30.0 ft | unknown | SAND TUFF |
| 30.0-40.0 ft | unknown | SAND CLAY GRAVEL |
| 40.0-50.0 ft | unknown | SAND CLAY GRAVEL |
| 50.0-60.0 ft | unknown | SAND CLAY GRAVEL |
| 60.0-70.0 ft | unknown | SAND |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-131577 Site Number 131577 Site Type WELL Lat/Long (NAD83) 45.3937, -112.4229 Well Depth 63 Feet Elevation (NAVD88) 4854.544 ft Latitude 45.39368915 Longitude -112.4228556 Local Aquifer Name 120SDMS SEDIMENTS (TERTIARY) (None) National Aquifer Name Northern Rocky Mountains Intermontane Basins aquifer systems (S100NRMTIB) Aquifer Type UNCONFINED 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 41.15 25.26 13.90 1964-12-05 2025-09-30 189 60.8 27.04 7.692 Statistics Calculated 2026-04-17 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 40.20 39.55 26.42 24.17 19.73 15.20 14.21 32 32 Apr 41.15 40.98 39.33 26.82 23.00 18.32 17.85 10 10 Jun 40.49 39.38 26.46 23.53 18.95 15.59 14.43 30 30 Aug 39.60 39.59 39.38 26.41 25.00 15.82 14.82 10 10 Sep 40.00 26.66 26.09 23.72 18.82 16.43 15.88 25 25 Dec 39.90 39.08 26.12 23.97 18.35 16.37 13.90 34 34 Statistics Calculated 2026-04-17 -
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