MBMG-70688
Montana Bureau of Mines and Geology
Located in Lewis and Clark 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 | |
|---|---|---|
| 0.0-47.5 ft | 6.0 in diameter steel casing | |
| 47.5-47.5 ft | 6.0 in diameter open bottom screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-18.0 ft | unknown | SAND & GRAVEL |
| 18.0-39.0 ft | unknown | SAND & CLAY |
| 39.0-45.0 ft | unknown | SAND |
| 45.0-46.0 ft | unknown | CLAY |
| 46.0-47.5 ft | unknown | COARSE SAND & GRAVEL |
-
Agency Montana Bureau of Mines and Geology Site Name MBMG-70688 Site Number 70688 Site Type WELL Lat/Long (NAD83) 46.9445, -112.6693 Well Depth 47.5 Feet Elevation (NAVD88) 4553.76 ft Latitude 46.94450975 Longitude -112.6692763 Local Aquifer Name 110ALVM ALLUVIUM (QUATERNARY (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 -
-
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 11.69 6.30 2.75 1993-09-29 2026-04-10 102 32.6 5.31 75.0 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 10.16 9.95 8.81 7.59 7.10 6.85 6.82 11 11 Apr 11.69 11.2 8.28 5.66 5.31 4.83 4.81 11 11 Jul 6.07 6.07 6.01 5.83 5.59 5.32 5.27 11 11 Oct 7.98 7.97 6.95 6.54 6.28 6.10 6.05 11 11 Statistics Calculated 2026-05-18 -
Operated in cooperation with:
