A-1 Drilling/Billings Drilling
Recorded as the driller on 804 water wells across 16 Montana counties in Montana Bureau of Mines and Geology Ground Water Information Center (GWIC), most in Yellowstone County. Well-log records span 1980–2025.
Counties served
Wells drilled by A-1 Drilling/Billings Drilling, by county, across the full record.
| County | Wells drilled |
|---|---|
| Yellowstone County | 498 |
| Stillwater County | 198 |
| Carbon County | 45 |
| Sweet Grass County | 25 |
| Big Horn County | 9 |
| Golden Valley County | 6 |
| Musselshell County | 6 |
| Park County | 4 |
| Jefferson County | 3 |
| Fergus County | 2 |
| Gallatin County | 2 |
| Meagher County | 2 |
…and 4 more Montana counties.
Well characteristics
Across the wells A-1 Drilling/Billings Drilling has drilled, the median depth is 39 ft (middle half 29 ft–82 ft), median tested yield 48 gpm, and median static water level 14 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.
Original drilling logs
Recent well logs filed by A-1 Drilling/Billings Drilling, straight from the public MBMG record:
"Records span 1980–2025" 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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