MBMG-154583
Montana Bureau of Mines and Geology
Located in Granite 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 | |
|---|---|---|
| -2.0-140.0 ft | 6.0 in diameter steel casing | |
| 130.0-160.0 ft | 4.0 in diameter pvc casing | |
| 127.0-135.0 ft | 6.0 in diameter holte perforator slots screen | |
| 140.0-160.0 ft | 4.0 in diameter saw slots screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-1.0 ft | unknown | TOPSOIL |
| 1.0-24.0 ft | unknown | PINKISH-BROWN SILTY SAND. GRAVEL & COBBLES MINOR RED CLAYS MOSTLY SILT 1-6 FT |
| 24.0-36.0 ft | unknown | RED-BROWN GRAVELLY CLAY |
| 36.0-51.0 ft | unknown | SILTY GRAVEL & COBBLES WATER |
| 51.0-55.0 ft | unknown | LIGHT BROWN CLAY & GRAVELLY CLAY |
| 55.0-100.0 ft | unknown | SOFT TO STIFF TAN CLAY GRAY-GREEN VOLCANIC ASH NEAR 90 FT |
| 100.0-115.0 ft | unknown | HARD TAN CLAYSTONE |
| 115.0-140.0 ft | unknown | HARD TAN CLAYSTONE WITH SMALL GRAVEL |
| 140.0-150.0 ft | unknown | SOFT BROWN CLAY WITH SAND |
| 150.0-151.0 ft | unknown | SMALL GRAVEL WITH CLAY |
| 151.0-160.0 ft | unknown | HARD TAN CLAYSTONE WATER |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-154583 Site Number 154583 Site Type WELL Lat/Long (NAD83) 46.6211, -113.2067 Well Depth 160 Feet Elevation (NGVD29) 4245.0 ft Latitude 46.62112925 Longitude -113.2066994 Local Aquifer Name 120SNGR, SAND AND GRAVEL (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 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 51.62 39.64 25.04 1995-12-26 2026-04-08 1146 30.3 48.00 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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