Underdahl, N
Recorded as the driller on 249 water wells across 10 Minnesota counties in the Minnesota County Well Index (CWI), maintained by the Minnesota Geological Survey and the Minnesota Department of Health, most in Olmsted County. Well-log records span 2010–2025.
Counties served
Wells drilled by Underdahl, N, by county, across the full record.
| County | Wells drilled |
|---|---|
| Olmsted County | 116 |
| Fillmore County | 33 |
| Winona County | 24 |
| Dodge County | 21 |
| Wabasha County | 20 |
| Goodhue County | 14 |
| Mower County | 13 |
| Houston County | 6 |
| Freeborn County | 1 |
| Rice County | 1 |
Well characteristics
Across the wells Underdahl, N has drilled, the median depth is 400 ft (middle half 357 ft–470 ft), median tested yield 25 gpm, and median static water level 157 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.
Original drilling logs
Recent well logs filed by Underdahl, N, straight from the public MGS/MDH record:
"Records span 2010–2025" refers to the earliest and latest well logs attributed to this company in the MGS/MDH 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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