American Drilling & Supply
Recorded as the driller on 3,867 water wells across 20 Montana counties in Montana Bureau of Mines and Geology Ground Water Information Center (GWIC), most in Yellowstone County. Well-log records span 1939–2026.
Counties served
Wells drilled by American Drilling & Supply, by county, across the full record.
| County | Wells drilled |
|---|---|
| Yellowstone County | 3,018 |
| Big Horn County | 243 |
| Carbon County | 197 |
| Stillwater County | 170 |
| Musselshell County | 84 |
| Treasure County | 71 |
| Sweet Grass County | 22 |
| Rosebud County | 17 |
| Wheatland County | 14 |
| Golden Valley County | 13 |
| Custer County | 4 |
| Garfield County | 3 |
…and 8 more Montana counties.
Well characteristics
Across the wells American Drilling & Supply has drilled, the median depth is 43 ft (middle half 29 ft–120 ft), median tested yield 25 gpm, and median static water level 17 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.
Original drilling logs
Recent well logs filed by American Drilling & Supply, straight from the public MBMG record:
"Records span 1939–2026" 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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