⟁ Illinois Well Data field records · 2026 survey

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Senffner, Alan James

Recorded as the driller on 1,253 water wells across 12Illinoiscounties in the Illinois State Geological Survey water well records, most in Kane County. Well-log records span 1954–2020.

1,253wells on record
—since 2022
12counties served
220 ftmedian depth

Counties served

Wells drilled by Senffner, Alan James, by county, across the full record.

CountyWells drilled
Kane County564
Dupage County303
Cook County184
Will County80
Dekalb County44
Mchenry County42
Kendall County17
Lake County9
Lasalle County7
Grundy County1
Lee County1
Ogle County1

Well characteristics

Across the wells Senffner, Alan James has drilled, the median depth is 220 ft (middle half 175 ft–295 ft), median tested yield 10 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 Senffner, Alan James, straight from the public ISGS record:

"Records span 1954–2020" 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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