Senffner, Alan James
Recorded as the driller on 1,250 water wells across 12 Illinois counties in the Illinois State Geological Survey water well records, most in Kane County. Well-log records span 1954–2020.
Counties served
Wells drilled by Senffner, Alan James, by county, across the full record.
| County | Wells drilled |
|---|---|
| Kane County | 564 |
| Dupage County | 303 |
| Cook County | 184 |
| Will County | 77 |
| Dekalb County | 44 |
| Mchenry County | 42 |
| Kendall County | 17 |
| Lake County | 9 |
| Lasalle County | 7 |
| Grundy County | 1 |
| Lee County | 1 |
| Ogle County | 1 |
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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