Adolphson, Robert M. Jr.
Recorded as the driller on 759 water wells across 12Illinoiscounties in the Illinois State Geological Survey water well records, most in Mercer County. Well-log records span 1964–1990.
Counties served
Wells drilled by Adolphson, Robert M. Jr., by county, across the full record.
| County | Wells drilled |
|---|---|
| Mercer County | 268 |
| Warren County | 178 |
| Henry County | 84 |
| Rock Island County | 74 |
| Knox County | 69 |
| Henderson County | 39 |
| Stark County | 20 |
| Fulton County | 10 |
| Peoria County | 9 |
| Bureau County | 6 |
| Mcdonough County | 1 |
| Hancock County | 1 |
Well characteristics
Across the wells Adolphson, Robert M. Jr. has drilled, the median depth is 412 ft (middle half 220 ft–494 ft), median tested yield 15 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 Adolphson, Robert M. Jr., straight from the public ISGS record:
"Records span 1964–1990" 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.
Free. Goes to licensed drillers working Mercer County, including Adolphson, Robert M. Jr..
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