⟁ Illinois Well Data field records · 2026 survey

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Holdorf Donald

Recorded as the driller on 26 water wells across 3Illinoiscounties in the Illinois State Geological Survey water well records, most in Rock Island County. Well-log records span 1967–1969.

26wells on record
—since 2022
3counties served
310 ftmedian depth

Counties served

Wells drilled by Holdorf Donald, by county, across the full record.

CountyWells drilled
Rock Island County20
Henry County5
Knox County1

Well characteristics

Across the wells Holdorf Donald has drilled, the median depth is 310 ft (middle half 172 ft–354 ft), median tested yield 15 gpm, and median static water level — below ground surface. These summarize the company's own filed logs, not a marketing claim.

Original drilling logs

Recent well logs filed by Holdorf Donald, straight from the public ISGS record:

"Records span 1967–1969" refers to the earliest and latest well logs attributed to this company in the ISGS 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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