MBMG-136486

Montana Bureau of Mines and Geology

Located in Ravalli 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
0.0-50.5 ft 6.0 in diameter steel casing
52.0-52.0 ft 6.0 in diameter open bottom screen
Depth Lithology Description
0.0-3.0 ft unknown ARKOSIC GRAVEL- SILT AND SAND TO 1 INCH.
3.0-17.0 ft unknown BUFF COLORED SANDY SILT- CLAY W/SOME GRAVEL
17.0-22.0 ft unknown ROUNDED GRAVEL GNEISSIC TO 3/4 IN AND BUFF SILT 50 PERCENT - 50 PERCENT
22.0-24.0 ft unknown FINE TO MED FINE HEAVING SAND-GRAY SLIGHTLY DIRTY
24.0-25.0 ft unknown FINE GNEISSIC GRAVAL- SAND- HEAVING
25.0-27.0 ft unknown FINE SAND- SOME GRANITIC GRAVEL- HEAVING
27.0-30.0 ft unknown FINE SAND
30.0-32.0 ft unknown FINE SAND- HEAVING
32.0-36.0 ft unknown GRANITIC GRAVEL TO 1 IN - PERHAPS 5 PERCENT ARGILLITE. WATER
36.0-39.0 ft unknown GRIT- HEAVING
39.0-44.0 ft unknown GRIT AND SAND- GRAY TO WHITE - HEAVING
44.0-47.0 ft unknown GRIT- GRAVEL TO 3/4-CLEAN-ANGULAR-MOSTLY GRANITIC
47.0-50.0 ft unknown GRANITIC TO GNEISSIC GRAVEL
50.0-52.0 ft unknown FINE GRAY SAND- SMALL PERCENTAGE OF GRIT

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