Tolley, David F.
Recorded as the driller on 125 water wells across 13 Illinois counties in the Illinois State Geological Survey water well records, most in Lasalle County. Well-log records span 1980–2007.
Counties served
Wells drilled by Tolley, David F., by county, across the full record.
| County | Wells drilled |
|---|---|
| Lasalle County | 83 |
| Lee County | 13 |
| Bureau County | 8 |
| Dekalb County | 5 |
| Ogle County | 3 |
| Peoria County | 3 |
| Marshall County | 2 |
| Rock Island County | 2 |
| Will County | 2 |
| Mchenry County | 1 |
| Tazewell County | 1 |
| Whiteside County | 1 |
…and 1 more Illinois counties.
Well characteristics
Across the wells Tolley, David F. has drilled, the median depth is 140 ft (middle half 100 ft–200 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 Tolley, David F., straight from the public ISGS record:
"Records span 1980–2007" 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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