MBMG-1862
Montana Bureau of Mines and Geology
Located in Judith Basin County, Montana, this groundwater monitoring location is associated with a water well in the Lower Cretaceous aquifers.
Well Construction
| Depth | Description | |
|---|---|---|
| -1.0-40.0 ft | 6.0 in diameter steel casing | |
| 16.0-238.0 ft | 4.0 in diameter steel casing | |
| 198.0-238.0 ft | 4.0 in diameter perforated casing screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-1.0 ft | unknown | TOPSOIL |
| 1.0-4.0 ft | unknown | SHALE (BROWN) |
| 4.0-25.0 ft | unknown | GRAVEL |
| 25.0-67.0 ft | unknown | RED SHALE |
| 67.0-77.0 ft | unknown | SAND |
| 77.0-112.0 ft | unknown | RED SHALE |
| 112.0-120.0 ft | unknown | SAND |
| 120.0-193.0 ft | unknown | RED SHALE WITH ROCK LINKS |
| 193.0-228.0 ft | unknown | SAND 2ND CAT (WATER) |
| 228.0-238.0 ft | unknown | RED SHALE |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-1862 Site Number 1862 Site Type WELL Lat/Long (NAD83) 46.9685, -110.0919 Well Depth 238 Feet Elevation (NGVD29) 4460.0 ft Latitude 46.96846361 Longitude -110.0918558 Local Aquifer Name 217KOTN KOOTENAI FORMATION (None) National Aquifer Name Lower Cretaceous aquifers (N300LCRTCS) Aquifer Type UNCONFINED Water-Level Well Type Trend Water-Level Well Characteristics Background 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 16.05 7.40 3.49 1993-11-11 2026-03-03 112 32.3 7.63 36.8 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 11.24 8.78 8.13 7.26 5.35 4.86 3.54 18 18 Jun 16.05 11.01 8.32 7.42 6.70 4.71 3.61 21 21 Sep 13.13 11.1 9.56 8.14 7.35 6.38 4.57 19 19 Dec 9.19 9.03 8.18 7.66 5.96 5.34 4.80 19 19 Statistics Calculated 2026-05-16 -
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