MBMG-892116

Montana Bureau of Mines and Geology

Located in Silver Bow 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
-2.0-136.0 ft 6.0 in diameter steel casing
8.0-208.0 ft 4.5 in diameter pvc casing
138.0-193.0 ft 4.5 in diameter saw slots screen
Depth Lithology Description
0.0-4.0 ft unknown BROWN- COARSE SAND
4.0-6.0 ft unknown SANDY BROWN CLAYS
6.0-7.0 ft unknown WHITE- COARSE SAND
7.0-12.0 ft unknown SANDY- WHITE CLAYS
12.0-30.0 ft unknown BROWN- SANDY CLAY
30.0-60.0 ft unknown COARSE SEMI-CONSOLIDATED SANDS
60.0-65.0 ft unknown WHITE CLAYS
65.0-101.0 ft unknown BLACK & WHITE SANDSTONE
101.0-118.0 ft unknown GRANITE- DIRTIER THAN ABOVE AND HAS SOME CLAY
118.0-120.0 ft unknown BLACK & WHITE GRANITE
120.0-136.0 ft unknown RED AND BLACK HARD SANDSTONE- GRANITE
136.0-143.0 ft unknown ALTERED BATHOLITH
143.0-208.0 ft unknown GRAY- WHITE AND GREEN ROCK
208.0-220.0 ft unknown SAME BUT SOFTER
220.0-297.0 ft unknown SAME- BECAME PROGRESSIVELY HARDER
297.0-312.0 ft unknown SLIGHT TRANSMISSION ZONE A BIT MORE BROWN & SOFTER
312.0-322.0 ft unknown GRAY- WHITE- GREEN ROCK (CHLORIDE- VERY HARD) WELL CAVED TO 206.5 BEFORE CASING - T.D = 206.5

Operated in cooperation with: