MBMG-153975
Montana Bureau of Mines and Geology
Located in Phillips County, Montana, this groundwater monitoring location is associated with a water well in the Upper Cretaceous aquifers.
Well Construction
| Depth | Description | |
|---|---|---|
| -2.0-75.0 ft | 8.0 in diameter steel casing | |
| 8.0-165.0 ft | 5.0 in diameter pvc casing | |
| 120.0-150.0 ft | 5.0 in diameter johnson screen screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-38.0 ft | unknown | GRAY SHALE |
| 38.0-39.0 ft | unknown | ROCK |
| 39.0-48.0 ft | unknown | GRAY SHALE |
| 48.0-67.0 ft | unknown | GRAVEL BIG |
| 67.0-74.0 ft | unknown | SHALE |
| 74.0-75.0 ft | unknown | ROCK |
| 75.0-79.0 ft | unknown | GREENISH GRAY SHALE |
| 79.0-94.0 ft | unknown | SHALE - DARK |
| 94.0-106.0 ft | unknown | SANDSTONE GRAY |
| 106.0-120.0 ft | unknown | SHALE - GRAY |
| 120.0-153.0 ft | unknown | SAND/SANDSTONE GRAY WATER |
| 153.0-155.0 ft | unknown | SANDSTONE GRAY WATER |
| 155.0-165.0 ft | unknown | GRAY SHALE |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-153975 Site Number 153975 Site Type WELL Lat/Long (NAD83) 48.4947, -108.0123 Well Depth 165 Feet Elevation (NGVD29) 2545.0 ft Latitude 48.49470864 Longitude -108.0123059 Local Aquifer Name 211JDRV JUDITH RIVER FORMATION (OF MONTANA GROUP) (None) National Aquifer Name Upper Cretaceous aquifers (N300UPCTCS) 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 62.39 54.08 44.97 1996-08-21 2026-04-08 81 29.7 54.79 20.00 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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