MBMG-191525
Montana Bureau of Mines and Geology
Located in Lewis and Clark 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 | |
|---|---|---|
| 0.0-50.0 ft | 4.0 in diameter pvc casing | |
| 40.0-50.0 ft | 4.0 in diameter screen-continuous-pvc screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-20.0 ft | unknown | GRAVEL 60 PERCENT COARSE SAND 30 PERCENT FINE SAND SILT CLAY 10 PERCENT WATER AT ABOUT 8FT BELOW LAND SURFACE |
| 20.0-25.0 ft | unknown | GRAVEL WITH SAND GRAVEL UP TO 1.5IN DIAMETER |
| 25.0-30.0 ft | unknown | SILTY GRAVELY COARSE SANDY |
| 30.0-35.0 ft | unknown | SANDY SILT WITH GRAVEL |
| 35.0-40.0 ft | unknown | GRAVELY SILT AND SAND |
| 40.0-45.0 ft | unknown | PEA GRAVEL COARSE SAND |
| 45.0-50.0 ft | unknown | SILTY SANDY GRAVEL |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-191525 Site Number 191525 Site Type WELL Lat/Long (NAD83) 46.6523, -111.9948 Well Depth 50 Feet Elevation (NGVD29) 3710.0 ft Latitude 46.65233576 Longitude -111.9948292 Local Aquifer Name 110ALVM ALLUVIUM (QUATERNARY) (None) National Aquifer Name Northern Rocky Mountains Intermontane Basins aquifer systems (S100NRMTIB) Aquifer Type UNCONFINED Water-Level Well Type Trend Water-Level Well Characteristics Background Water Quality Network 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 8.93 4.48 0.89 2001-12-04 2026-01-28 203 24.1 5.73 57.1 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 Jan 7.99 7.52 6.68 5.78 4.10 3.20 3.16 13 13 Feb 8.16 7.78 6.47 5.80 4.22 3.71 3.63 13 13 Mar 8.93 8.61 6.33 4.84 4.38 3.97 3.40 18 18 Apr 7.83 5.57 4.77 4.32 4.12 3.73 2.87 18 18 May 5.51 5.07 3.92 3.11 2.46 2.18 1.98 15 15 Jun 4.33 4.19 3.88 3.15 2.39 0.95 0.89 18 18 Jul 5.07 4.83 4.53 3.95 3.48 3.01 2.65 19 19 Aug 6.49 5.89 5.35 4.68 3.86 3.12 3.07 18 18 Sep 6.62 6.42 5.67 5.03 4.02 3.66 3.64 17 17 Oct 6.47 6.43 6.08 5.07 4.21 3.98 3.94 15 15 Nov 7.23 7.14 6.04 4.54 4.12 3.70 3.38 15 15 Dec 8.54 7.96 6.38 5.57 4.78 3.79 3.71 15 15 Statistics Calculated 2026-05-16 -
Operated in cooperation with:
