MBMG-151189
Montana Bureau of Mines and Geology
Located in Missoula 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 | |
|---|---|---|
| 0.0-50.0 ft | 6.0 in diameter steel casing | |
| 38.0-48.0 ft | 6.0 in diameter unavailable screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-5.0 ft | unknown | SAND: FINE TO MEDIUM SAND WITH CHIPS - GRANULES AND A FEW SMALL PEBBLES. |
| 5.0-10.0 ft | unknown | CHIPS: PREDOMINANTLY CHIPS OF RED AND GREEN QUARTZITE AND PULVERIZED ROCK: ALSO SOME SAND - SOME 5CM COBBLES. HAND DRILLING FROM 7' TO 15'. |
| 10.0-15.0 ft | unknown | SAND: CHIPS OF RED AND GREEN QUARTZITE AND SILTITE - FINE SAND - COME PEBBLES. |
| 15.0-20.0 ft | unknown | SAND: BIG QUARTZITE CHIPS - FINE SAND AND PEBBLES. |
| 20.0-25.0 ft | unknown | SAND: MOIST COARSE SAND WITH 5CM PEBBLES (23-26'). |
| 25.0-30.0 ft | unknown | CLAY AND PEBBLES AND SAND: WATER AND FIRST CLAY AT 26'. |
| 30.0-35.0 ft | unknown | CLAY: LOTS OF CLAY WITH SILT AND SAND. CLAY GETS CLEANER DOWNWARD. |
| 35.0-37.0 ft | unknown | CLAY: FAIRLY CLEAN CLAY - LITTLE SAND - FEW PEBBLE (HAD TO ADD WATER AT 38-39'). COULDN'T TAKE WATER LEVEL WHEN ADD 40-60' PIPE DUE TO CLOGGED DRILL STEM. |
| 37.0-40.0 ft | unknown | GRAVEL AND MUD: GRAVEL AND MUD WITH CHIPS AND 2-3 CM PEBBLES. |
| 40.0-50.0 ft | unknown | GRANULES: GRANULES - PEBBLES - SOME COBBLES. LOTS OF WATER AND MEDIUM SAND. |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-151189 Site Number 151189 Site Type WELL Lat/Long (NAD83) 46.8564, -114.0605 Well Depth 50 Feet Elevation (NAVD88) 3154.44 ft Latitude 46.856421005556 Longitude -114.060540911111 Local Aquifer Name 112ALVM (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 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 31.58 27.95 20.32 1985-12-30 2026-05-17 7709 40.4 24.01 81.25 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 31.06 29.88 29.65 29.02 28.60 28.26 27.81 32 32 Feb 31.34 30.16 29.82 29.32 28.97 28.34 27.43 31 31 Mar 31.40 30.12 29.90 29.51 28.75 27.93 27.14 33 33 Apr 31.15 30.12 29.39 28.71 27.85 26.43 25.96 32 32 May 29.18 28.02 26.42 25.55 24.44 23.45 21.47 31 31 Jun 25.66 25.33 24.65 23.97 22.82 21.43 20.86 32 32 Jul 26.93 26.43 25.90 24.95 23.92 23.38 22.13 30 30 Aug 28.00 27.68 27.07 26.73 25.81 25.09 24.72 30 30 Sep 28.84 28.16 27.83 27.16 26.66 26.07 25.81 31 31 Oct 29.58 28.81 28.31 28.03 27.47 27.19 26.81 29 29 Nov 30.13 29.11 28.82 28.31 27.92 27.36 27.20 31 31 Dec 30.48 29.52 29.32 28.75 28.13 27.79 27.17 32 32 Statistics Calculated 2026-05-18 -
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