Silvius Bros.
Recorded as the driller on 394 water wells across 6 Illinois counties in the Illinois State Geological Survey water well records, most in Boone County. Well-log records span 1926–1979.
Counties served
Wells drilled by Silvius Bros., by county, across the full record.
| County | Wells drilled |
|---|---|
| Boone County | 252 |
| Mchenry County | 59 |
| Dekalb County | 43 |
| Winnebago County | 32 |
| Ogle County | 7 |
| Kane County | 1 |
Well characteristics
Across the wells Silvius Bros. has drilled, the median depth is 169 ft (middle half 125 ft–230 ft), median tested yield 20 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 Silvius Bros., straight from the public ISGS record:
"Records span 1926–1979" 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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