Larson & Swanson
Recorded as the driller on 60 water wells across 4 Illinois counties in the Illinois State Geological Survey water well records, most in Henry County. Well-log records span 1940–1946.
Counties served
Wells drilled by Larson & Swanson, by county, across the full record.
| County | Wells drilled |
|---|---|
| Henry County | 38 |
| Rock Island County | 17 |
| Ford County | 3 |
| Mercer County | 2 |
Well characteristics
Across the wells Larson & Swanson has drilled, the median depth is 299 ft (middle half 180 ft–451 ft), median tested yield 8 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 Larson & Swanson, straight from the public ISGS record:
"Records span 1940–1946" 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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