Mack Drilling Co.
Recorded as the driller on 2,791 water wells across 15 Oregon counties in the Oregon Water Resources Department (OWRD) well-log database, most in Marion County. Well-log records span 1990–2026.
Counties served
Wells drilled by Mack Drilling Co., by county, across the full record.
| County | Wells drilled |
|---|---|
| Marion County | 2,046 |
| Linn County | 310 |
| Polk County | 246 |
| Clackamas County | 57 |
| Yamhill County | 57 |
| Lincoln County | 22 |
| Harney County | 15 |
| Washington County | 11 |
| Benton County | 10 |
| Tillamook County | 9 |
| Multnomah County | 3 |
| Jefferson County | 2 |
…and 3 more Oregon counties.
Well characteristics
Across the wells Mack Drilling Co. has drilled, the median depth is 190 ft (middle half 101 ft–283 ft), median tested yield 30 gpm, and median static water level 44 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.
Original drilling logs
Recent well logs filed by Mack Drilling Co., straight from the public OWRD record:
"Records span 1990–2026" refers to the earliest and latest well logs attributed to this company in the OWRD 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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