MBMG-158589
Montana Bureau of Mines and Geology
Located in Yellowstone County, Montana, this groundwater monitoring location is associated with a water well in the Alluvial aquifers.
Well Construction
| Depth | Description | |
|---|---|---|
| -2.5-18.0 ft | 6.0 in diameter steel casing | |
| 10.0-18.0 ft | 4.0 in diameter plastic casing | |
| 20.0-25.0 ft | 4.0 in diameter plastic casing | |
| 18.0-20.0 ft | 4.0 in diameter 0.25 slot certainteed screen screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-1.0 ft | unknown | TOPSOIL |
| 1.0-5.0 ft | unknown | SANDY CLAY |
| 5.0-20.0 ft | unknown | SAND & COARSE GRAVEL |
| 20.0-21.0 ft | unknown | CLAY |
| 21.0-25.0 ft | unknown | SHALE |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-158589 Site Number 158589 Site Type WELL Lat/Long (WGS84) 45.7051, -108.6442 Well Depth 25 Feet Elevation (NAVD88) 3208.5 ft Latitude 45.705102 Longitude -108.644155 Local Aquifer Name 111ALVM, ALLUVIUM (HOLOCENE) (None) National Aquifer Name Alluvial aquifers (N100ALLUVL) Aquifer Type UNCONFINED 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 11.06 7.99 4.99 1997-03-03 2026-05-17 9776 29.2 8.26 24.1 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 8.13 8.06 8.02 7.91 7.74 7.62 7.55 29 29 Feb 8.12 8.04 7.98 7.90 7.74 7.65 7.63 27 27 Mar 8.13 7.97 7.92 7.84 7.65 7.36 7.21 28 28 Apr 8.39 8.08 7.94 7.80 7.33 6.95 6.66 30 30 May 9.00 8.71 8.24 7.91 7.39 7.03 6.84 28 28 Jun 9.43 9.10 8.73 8.16 7.77 6.95 6.21 28 28 Jul 10.37 10.3 9.48 8.93 8.56 8.14 7.58 29 29 Aug 10.84 10.65 10.21 9.50 9.11 8.11 7.10 29 29 Sep 10.58 10.33 9.9 9.30 8.70 8.04 7.58 26 26 Oct 9.57 9.45 8.96 8.28 8.07 7.82 7.49 29 29 Nov 8.69 8.53 8.15 7.95 7.82 7.64 7.45 28 28 Dec 8.22 8.19 8.02 7.92 7.70 7.62 7.59 27 27 Statistics Calculated 2026-05-18 -
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