MBMG-31165
Montana Bureau of Mines and Geology
Located in Garfield County, Montana, this groundwater monitoring location is associated with a water well in the Upper Cretaceous aquifers.
Well Construction
| Depth | Description | |
|---|---|---|
| 0.0-478.0 ft | 4.0 in diameter plastic casing | |
| 448.0-468.0 ft | 4.0 in diameter .020 slots screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-10.0 ft | unknown | GUMBO AND SHALE |
| 10.0-20.0 ft | unknown | SHALE-SILTSTONE-STRINGERS OF COAL |
| 20.0-35.0 ft | unknown | CLAY |
| 35.0-45.0 ft | unknown | GRAY SILTSTONE |
| 45.0-65.0 ft | unknown | CLAY WITH STRINGERS OF COAL |
| 65.0-80.0 ft | unknown | GRAY SHALE |
| 80.0-87.0 ft | unknown | GRAY SANDSTONE AND SILTSTONE |
| 87.0-91.0 ft | unknown | HARD ROCK |
| 91.0-100.0 ft | unknown | SANDSTONE |
| 100.0-137.0 ft | unknown | GRAY CLAY |
| 137.0-139.0 ft | unknown | GRAY SILTROCK |
| 139.0-165.0 ft | unknown | CLAY |
| 165.0-170.0 ft | unknown | GRAY SANDSTONE |
| 170.0-195.0 ft | unknown | CLAY |
| 195.0-210.0 ft | unknown | SANDSTONE AND SILTSTONE |
| 210.0-215.0 ft | unknown | HARD SAND ROCK |
| 215.0-280.0 ft | unknown | GRAY SANDSTONE AND SILTSTONE |
| 280.0-290.0 ft | unknown | SILTSTONE WITH CLAY STRINGERS |
| 290.0-338.0 ft | unknown | BLUE GRAY CLAY |
| 338.0-340.0 ft | unknown | HARD ROCK |
| 340.0-365.0 ft | unknown | GRAY SILTSTONE AND CLAY |
| 365.0-385.0 ft | unknown | SANDSTONE AND SILTSTONE |
| 385.0-450.0 ft | unknown | CLAY |
| 450.0-470.0 ft | unknown | BLUE SANDSTONE (FOX HILLS) |
| 470.0-475.0 ft | unknown | CLAY AND SANDSTONE |
| 475.0-477.0 ft | unknown | HARD SAND ROCK |
| 477.0-520.0 ft | unknown | GRAY CLAY |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-31165 Site Number 31165 Site Type WELL Lat/Long (NAD83) 47.3103, -106.911 Well Depth 520 Feet Elevation (NGVD29) 2660.0 ft Latitude 47.31030057 Longitude -106.9110218 Local Aquifer Name 211FHHC FOX HILLS-HELL CREEK AQUIFER (None) National Aquifer Name Upper Cretaceous aquifers (N300UPCTCS) Aquifer Type CONFINED 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 45.78 38.84 32.93 1983-08-12 2026-03-12 121 42.6 36.75 Statistics Calculated 2026-05-18 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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