MBMG-126044
Montana Bureau of Mines and Geology
Located in Stillwater County, Montana, this groundwater monitoring location is associated with a water well in the Upper Cretaceous aquifers.
Well Construction
| Depth | Description | |
|---|---|---|
| -1.5-68.0 ft | 4.0 in diameter pvc casing | |
| 58.0-68.0 ft | 4.0 in diameter #20 slot screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-2.0 ft | unknown | CLAY LOAM DARK BROWN TOPSOIL |
| 2.0-11.0 ft | unknown | CLAY YELLOWISH BROWN SILTY |
| 11.0-16.0 ft | unknown | GRAVEL |
| 16.0-47.0 ft | unknown | SANDSTONE FINE YELLOWISH BROWN CHANGES TO MEDIUM GRAY WITH DEPTH |
| 47.0-59.0 ft | unknown | SHALE FINE DARK BROWN TO DARK GRAY |
| 59.0-67.0 ft | unknown | SANDSTONE FINE MEDIUM GRAY |
| 67.0-70.0 ft | unknown | SHALE DARK GRAY |
-
Agency Montana Bureau of Mines and Geology Site Name MBMG-126044 Site Number 126044 Site Type WELL Lat/Long (NAD83) 45.6793, -109.1566 Well Depth 70 Feet Elevation (NAVD88) 3999.3 ft Latitude 45.679281 Longitude -109.156615 Local Aquifer Name 211JDRV JUDITH RIVER FORMATION (OF MONTANA GROUP) (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 -
-
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 19.22 12.83 3.03 1995-06-22 2026-03-10 6426 30.8 11.45 73.91 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 19.06 18.66 17.14 14.13 12.28 10.45 9.66 26 26 Feb 19.21 18.17 16.31 12.91 11.79 10.33 9.93 21 21 Mar 19.22 18.09 16.33 12.75 11.34 10.28 10.14 22 22 Apr 18.57 18.28 17.28 14.23 11.77 10.1 9.14 27 27 May 17.68 17.25 16.18 13.20 10.55 10.1 8.87 19 19 Jun 17.63 17.19 14.88 12.41 10.39 8.84 5.58 21 21 Jul 18.64 17.94 15.76 12.39 10.39 9.48 6.78 29 29 Aug 17.42 16.79 14.54 12.20 10.59 9.41 7.55 23 23 Sep 17.36 16.09 14.24 12.35 10.89 9.59 8.09 21 21 Oct 18.30 17.67 15.83 14.07 11.58 10.2 8.58 27 27 Nov 17.85 16.61 14.76 12.60 10.93 10.12 8.98 22 22 Dec 18.87 17.79 15.44 12.51 11.28 10.13 9.36 20 20 Statistics Calculated 2026-05-16 -
Operated in cooperation with:
