MBMG-138002
Montana Bureau of Mines and Geology
Located in McCone County, Montana, this groundwater monitoring location is associated with a water well in the Upper Cretaceous aquifers.
Well Construction
| Depth | Description | |
|---|---|---|
| -1.8-300.0 ft | 4.0 in diameter pvc casing | |
| 260.0-300.0 ft | 4.0 in diameter screen-continuous-pvc screen |
| Depth | Lithology | Description |
|---|---|---|
| 0.0-5.0 ft | unknown | SILT- BROWN |
| 5.0-10.0 ft | unknown | SILT- BROWN- SANDY |
| 10.0-15.0 ft | unknown | SANDSTONE- V.FINE- SILTY |
| 15.0-20.0 ft | unknown | CLAY- GRAY- BRN- REDDISH BRN- SOME SAND |
| 20.0-25.0 ft | unknown | CLAY- GREENISH BROWN- SOME YELLOW STREAKS |
| 25.0-30.0 ft | unknown | AA |
| 30.0-35.0 ft | unknown | AA |
| 35.0-40.0 ft | unknown | AA TO BRN CLAY |
| 40.0-45.0 ft | unknown | SS- FINE- YELLOWISH BRN & YELLOWISH BRN CLAY |
| 45.0-50.0 ft | unknown | SS- FINE- YELLOWISH BRN- SOME CLAY |
| 50.0-55.0 ft | unknown | AA- SOME HARD STREAKS OF DK GRAY SS |
| 55.0-60.0 ft | unknown | SS- FINE AND CLAY (STRINGERS?)- BROWN |
| 60.0-65.0 ft | unknown | AA |
| 65.0-70.0 ft | unknown | AA |
| 70.0-75.0 ft | unknown | SS- FINE BRN- SOME CLAY |
| 75.0-80.0 ft | unknown | SS- FINE- BRN |
| 80.0-85.0 ft | unknown | AA |
| 85.0-90.0 ft | unknown | SS- FINE AND CLAY- GRAY |
| 90.0-95.0 ft | unknown | SS- FINE- BROWN & GRAY |
| 95.0-100.0 ft | unknown | CLAY- DARK GREENISH GRAY |
| 100.0-105.0 ft | unknown | SHALE- V. DK. BRN. |
| 105.0-110.0 ft | unknown | AA TO GRAY SILTY CLAY @ 106' |
| 110.0-115.0 ft | unknown | SHALE- GREENISH GRAY- SOFT |
| 115.0-120.0 ft | unknown | AA |
| 120.0-125.0 ft | unknown | SHALE- V. DK. BRN. |
| 125.0-130.0 ft | unknown | SHALE- V. DK. BRN- GREEN STREAKS |
| 130.0-135.0 ft | unknown | SHALE- GREENISH GRAY |
| 135.0-140.0 ft | unknown | AA |
| 140.0-145.0 ft | unknown | SHALE- V.DK. BRN.- SOME HARD |
| 145.0-150.0 ft | unknown | SHALE- GRAY |
| 150.0-155.0 ft | unknown | SS & CLAY- GRAY |
| 155.0-160.0 ft | unknown | SS- FINE- GRAY (BLK & GRAY GRAINS)- CLAYEY |
| 165.0-170.0 ft | unknown | AA |
| 170.0-175.0 ft | unknown | SS- FINE- GRAY- CLAYEY |
| 175.0-180.0 ft | unknown | AA |
| 180.0-185.0 ft | unknown | SS- FINE DK. GRAY- A LITTLE CLAY |
| 185.0-190.0 ft | unknown | AA |
| 190.0-195.0 ft | unknown | AA |
| 195.0-200.0 ft | unknown | AA |
| 200.0-205.0 ft | unknown | AA |
| 205.0-210.0 ft | unknown | AA- HARD GRAY FINE SS @ 209(1/2)' |
| 210.0-215.0 ft | unknown | SS- FINE DARK GRAY- CLAYEY |
| 215.0-220.0 ft | unknown | SS- FINE- DARK GRAY |
| 220.0-225.0 ft | unknown | AA |
| 225.0-230.0 ft | unknown | AA |
| 230.0-235.0 ft | unknown | AA |
| 235.0-240.0 ft | unknown | AA |
| 240.0-245.0 ft | unknown | AA- A LITTLE HARD TAN SILTSTONE |
| 245.0-250.0 ft | unknown | AA |
| 250.0-255.0 ft | unknown | AA |
| 255.0-260.0 ft | unknown | SAND- FINE DARK GRAY |
| 260.0-265.0 ft | unknown | SS- FINE- DK. GRAY- NUMEROUS HARD HARD STREAKS OF GRAY SS |
| 265.0-270.0 ft | unknown | AA |
| 270.0-275.0 ft | unknown | AA |
| 275.0-280.0 ft | unknown | AA |
| 280.0-285.0 ft | unknown | SS FINE DK GRAY STRINGERS OF V. HARD TAN CLAYSTONE |
| 285.0-290.0 ft | unknown | AA |
| 290.0-295.0 ft | unknown | AA |
| 295.0-300.0 ft | unknown | CLAY- GRAY- SANDY |
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Agency Montana Bureau of Mines and Geology Site Name MBMG-138002 Site Number 138002 Site Type WELL Lat/Long (WGS84) 47.825, -106.1061 Well Depth 300 Feet Elevation (NAVD88) 2449.9 ft Latitude 47.8250004 Longitude -106.1061038 Local Aquifer Name 211FHHC FOX HILLS-HELL CREEK AQUIFER (None) National Aquifer Name Upper Cretaceous aquifers (N300UPCTCS) 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 179.61 178.07 177.33 1983-10-13 2025-09-27 2340 41.9 177.90 81.250 Statistics Calculated 2026-01-14 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 178.61 178.42 178.25 178.10 177.97 177.76 177.69 22 22 May 178.23 178.15 178.09 178.05 177.87 177.65 177.59 25 25 Aug 178.34 178.21 178.11 178.08 177.97 177.74 177.72 25 25 Sep 178.82 178.76 178.60 178.10 178.03 177.83 177.76 15 15 Oct 179.61 179.33 178.73 178.14 178.04 177.80 177.66 13 13 Nov 178.60 178.35 178.13 178.01 177.94 177.61 177.47 26 26 Statistics Calculated 2026-01-14 -
Operated in cooperation with:
