MBMG-71610
Montana Bureau of Mines and Geology
Located in Powell 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 | |
|---|---|---|
| 0.0-208.0 ft | 6.0 in diameter steel casing | |
| 208.0-208.2 ft | 6.0 in diameter open bottom screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-13.5 ft | unknown | GRAVEL- COBBLES & BOULDERS |
| 13.5-16.5 ft | unknown | CLAYEY GRAVEL |
| 16.5-36.0 ft | unknown | GRAVEL & CLAY |
| 36.0-56.0 ft | unknown | SANDY CLAY |
| 56.0-99.0 ft | unknown | PINKISH CLAY WITH SOME GRAVEL |
| 99.0-120.0 ft | unknown | REDDISH GLACIAL SILT |
| 120.0-136.8 ft | unknown | SMALL WATER SEAM |
| 136.8-168.0 ft | unknown | GREY-GREEN SILT CLAY |
| 168.0-197.0 ft | unknown | GREENISH TAN BENTONITE CLAY |
| 197.0-204.0 ft | unknown | DARK GREY SANDY CLAY |
| 204.0-208.2 ft | unknown | COARSE GRANITE SAND BOTTOMED HOLE IN COURSE 6IN GRANITE SAND |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-71610 Site Number 71610 Site Type WELL Lat/Long (NAD83) 47.0135, -113.0667 Well Depth 208 Feet Elevation (NGVD29) 4268.0 ft Latitude 47.01353904 Longitude -113.0666893 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 109.14 104.71 95.79 1975-09-22 2026-04-10 8896 50.6 107.33 0.0 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 107.67 107.30 106.25 104.73 102.58 99.16 96.16 29 29 Feb 107.17 106.63 106.03 104.55 101.10 98.51 96.28 24 24 Mar 107.32 106.86 105.92 104.47 101.48 98.76 96.52 26 26 Apr 107.33 107.10 106.11 104.50 101.72 98.27 95.79 31 31 May 107.43 106.97 106.32 104.92 101.69 98.91 97.10 26 26 Jun 107.59 106.79 106.16 104.62 101.24 98.23 95.92 27 27 Jul 107.74 107.40 106.58 104.98 103.21 99.63 97.64 31 31 Aug 107.80 107.62 106.70 105.14 103.91 99.41 97.88 26 26 Sep 107.75 107.01 106.21 104.59 101.57 97.97 96.24 29 29 Oct 107.92 107.61 106.62 104.89 103.24 99.43 96.19 35 35 Nov 107.68 107.05 106.42 104.53 101.56 98.76 96.07 25 25 Dec 107.44 106.74 106.19 104.67 101.68 98.85 96.01 26 26 Statistics Calculated 2026-05-16 -
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