Callison Well Drilling
Recorded as the driller on 693 water wells across 10 Montana counties in Montana Bureau of Mines and Geology Ground Water Information Center (GWIC), most in Mineral County. Well-log records span 1993–2026.
Counties served
Wells drilled by Callison Well Drilling, by county, across the full record.
| County | Wells drilled |
|---|---|
| Mineral County | 303 |
| Sanders County | 219 |
| Missoula County | 142 |
| Ravalli County | 11 |
| Flathead County | 5 |
| Lake County | 5 |
| Granite County | 4 |
| Powell County | 2 |
| Daniels County | 1 |
| Deer Lodge County | 1 |
Well characteristics
Across the wells Callison Well Drilling has drilled, the median depth is 160 ft (middle half 100 ft–280 ft), median tested yield 25 gpm, and median static water level 70 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.
Original drilling logs
Recent well logs filed by Callison Well Drilling, straight from the public MBMG record:
"Records span 1993–2026" refers to the earliest and latest well logs attributed to this company in the MBMG database — the state digitized older paper logs, so the first date is the oldest record on file, not necessarily the company's founding year.
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