MBMG-136927
Montana Bureau of Mines and Geology
Located in Cascade County, Montana, this groundwater monitoring location is associated with a water well in the Sand and gravel aquifers (glaciated regions).
Well Construction
| Depth | Description | |
|---|---|---|
| -1.5-281.0 ft | 6.0 in diameter steel casing | |
| 281.0-281.0 ft | 8.0 in diameter open bottom screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-22.0 ft | unknown | BROWN CLAY |
| 22.0-35.0 ft | unknown | CLAY AND GRAVEL |
| 35.0-276.0 ft | unknown | GRAY SILT WITH SCATTERED GRAVEL |
| 276.0-281.0 ft | unknown | SAND GRAVEL BROKEN SANDSTONE WATER |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-136927 Site Number 136927 Site Type WELL Lat/Long (NAD83) 47.5043, -111.0896 Well Depth 281 Feet Elevation (NAVD88) 3343.61 ft Latitude 47.50427027 Longitude -111.0896081 Local Aquifer Name 112GFLK GLACIAL GREAT FALLS LAKE SEDIMENTS (None) National Aquifer Name Sand and gravel aquifers (glaciated regions) (N100GLCIAL) 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 57.03 39.24 21.44 1996-08-20 2026-05-06 119 29.8 36.96 50.00 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 Feb 56.46 55.89 50.35 37.65 33.26 24.40 23.81 12 12 May 56.66 56.36 50.67 36.96 33.79 23.35 21.91 11 11 Jul 55.18 54.81 52.91 45.94 29.92 26.83 26.29 12 12 Aug 54.70 53.81 44.70 34.69 32.13 26.00 24.70 13 13 Oct 54.85 54.44 48.45 39.08 30.56 23.58 21.44 14 14 Nov 53.94 53.11 43.92 34.91 26.10 23.58 23.54 12 12 Statistics Calculated 2026-05-16 -
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