MBMG-234909
Montana Bureau of Mines and Geology
Located in Gallatin 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 | |
|---|---|---|
| -3.0-6.0 ft | 8.0 in diameter a53b steel casing | |
| -2.8-66.5 ft | 4.0 in diameter pvc-sched 40 casing | |
| 66.5-86.0 ft | 4.0 in diameter screen-continuous-pvc screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-3.0 ft | unknown | TOPSOIL, GRAVELLY CLAY LOAM |
| 3.0-5.0 ft | unknown | GRAVELLY SAND |
| 5.0-19.0 ft | unknown | GRAVELLY SAND WITH THIN PEBBLE GRAVEL |
| 19.0-21.0 ft | unknown | SANDY CLAY |
| 21.0-26.0 ft | unknown | FINE TO MEDIUM SAND WITH THIN PEBBLE GRAVEL LAYER |
| 26.0-36.0 ft | unknown | SILTY SAND WITH THIN PEBBLE GRAVEL LAYER |
| 36.0-41.0 ft | unknown | SANDY PEBBLE GRAVEL |
| 41.0-42.0 ft | unknown | CLEAN PEBBLE GRAVEL |
| 42.0-47.0 ft | unknown | MEDIUM COARSE SAND, SOME GRAVEL |
| 47.0-51.0 ft | unknown | CLAYEY SAND & GRAVEL |
| 51.0-58.0 ft | unknown | SANDY PEBBLE GRAVEL |
| 58.0-64.0 ft | unknown | CLAYEY SAND |
| 64.0-69.0 ft | unknown | CLAYEY SANDY PEBBLE GRAVEL |
| 69.0-83.0 ft | unknown | FINE PEBBLE GRAVEL WITH COARSE SAND |
| 83.0-85.0 ft | unknown | SANDY CLAY |
| 85.0-86.0 ft | unknown | CLEAN PEBBLE GRAVEL |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-234909 Site Number 234909 Site Type WELL Lat/Long (NAD83) 45.8025, -111.0454 Well Depth 86.5 Feet Elevation (NGVD29) 4620.0 ft Latitude 45.80254 Longitude -111.0454 Local Aquifer Name 120SNGR, SAND AND GRAVEL (TERTIARY) (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 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 59.89 52.00 38.43 2007-04-25 2026-05-14 5077 19.1 54.67 35.00 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 Jan 58.48 56.89 54.34 50.79 45.91 42.92 39.73 19 19 Feb 58.93 57.56 55.13 51.37 46.22 43.53 40.85 18 18 Mar 59.37 58.24 55.69 52.10 46.24 44.30 41.88 17 17 Apr 59.78 58.38 55.35 52.51 50.73 43.49 43.11 19 19 May 59.60 58.88 55.54 52.87 48.59 44.47 44.05 19 19 Jun 59.26 58.90 55.55 52.89 47.79 44.89 44.36 17 17 Jul 59.04 56.96 54.22 52.36 47.43 44.09 44.07 19 19 Aug 58.48 55.74 54.15 51.72 45.61 42.76 40.89 17 17 Sep 57.92 55.42 53.50 50.95 45.52 43.25 41.79 17 17 Oct 57.66 55.22 53.05 49.91 44.99 41.36 38.43 19 19 Nov 57.79 56.32 53.43 50.82 46.31 43.44 41.56 16 16 Dec 58.08 56.62 53.81 50.57 45.90 43.22 42.11 17 17 Statistics Calculated 2026-05-16 -
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