Simpson Drilling Co.
Recorded as the driller on 354 water wells across 11 Montana counties in Montana Bureau of Mines and Geology Ground Water Information Center (GWIC), most in Phillips County. Well-log records span 1936–1984.
Counties served
Wells drilled by Simpson Drilling Co., by county, across the full record.
| County | Wells drilled |
|---|---|
| Phillips County | 195 |
| Blaine County | 73 |
| Hill County | 53 |
| Valley County | 18 |
| Chouteau County | 6 |
| Mccone County | 4 |
| Daniels County | 1 |
| Prairie County | 1 |
| Richland County | 1 |
| Roosevelt County | 1 |
| Toole County | 1 |
Well characteristics
Across the wells Simpson Drilling Co. has drilled, the median depth is 98 ft (middle half 56 ft–234 ft), median tested yield 10 gpm, and median static water level 28 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.
Original drilling logs
Recent well logs filed by Simpson Drilling Co., straight from the public MBMG record:
"Records span 1936–1984" 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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