MBMG-3769
Montana Bureau of Mines and Geology
Located in Sheridan County, Montana, this groundwater monitoring location is associated with a water well in the Sand and gravel aquifers (glaciated regions).
Well Construction
| Depth | Description | |
|---|---|---|
| 0.0-270.0 ft | 4.0 in diameter plastic casing | |
| 230.0-250.0 ft | 4.0 in diameter 1/8in slots saw screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-65.0 ft | unknown | SAND- OTHER MATERIALS |
| 65.0-145.0 ft | unknown | GRAVEL- SAND- COAL SLACK |
| 145.0-155.0 ft | unknown | SAND |
| 155.0-164.0 ft | unknown | COAL SLACK AND SAND |
| 164.0-165.0 ft | unknown | GRAVEL |
| 165.0-170.0 ft | unknown | COAL SLACK AND SAND |
| 170.0-210.0 ft | unknown | FINE SANDY TILL (POSSIBLY LACUSTRINE W.V.V.) |
| 210.0-222.0 ft | unknown | FINE SAND |
| 222.0-251.0 ft | unknown | GRAVEL (CEMENTED?) |
| 251.0-270.0 ft | unknown | FINE SANDY CLAY (FORT UNION FORMATION) |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-3769 Site Number 3769 Site Type WELL Lat/Long (NAD83) 48.4978, -104.2815 Well Depth 270 Feet Elevation (NAVD88) 1950.49 ft Latitude 48.49782486 Longitude -104.281501 Local Aquifer Name 112ALVM, ALLUVIUM (PLEISTOCENE) (None) National Aquifer Name Sand and gravel aquifers (glaciated regions) (N100GLCIAL) Aquifer Type CONFINED Water-Level Well Type Trend Water-Level Well Characteristics Known Changes 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 14.47 2.88 -0.76 1984-07-18 2025-10-28 6764 41.2 3.48 44.7 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 Jan 4.05 3.61 3.06 2.31 1.67 1.25 1.01 25 25 Feb 4.10 3.51 3.34 2.21 1.59 1.23 1.05 23 23 Mar 4.17 3.41 2.68 1.81 1.35 0.78 0.57 23 23 Apr 6.57 4.31 2.21 1.32 0.88 0.47 -0.19 32 32 May 10.27 6.89 4.30 2.37 0.94 0.43 -0.19 31 31 Jun 10.5 9.8 6.53 3.58 2.69 0.66 -0.16 31 31 Jul 13.45 10.88 8.77 6.35 4.06 0.7 0.33 34 34 Aug 9.53 8.73 6.30 5.13 3.38 2.55 0.60 34 34 Sep 9.31 6.73 5.25 3.93 2.67 1.81 0.86 33 33 Oct 9.95 4.55 4.27 3.35 2.03 1.1 0.48 37 37 Nov 4.78 4.01 3.52 2.56 1.84 0.95 0.32 30 30 Dec 4.74 3.80 3.29 2.46 1.76 1.44 0.96 27 27 Statistics Calculated 2026-05-18 -
Operated in cooperation with:
