⟁ Illinois Well Data field records · 2026 survey

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Kohnen, Clarence

Recorded as the driller on 13,419 water wells across 45Illinoiscounties in the Illinois State Geological Survey water well records, most in St. Clair County. Well-log records span 1900–2017.

13,419wells on record
—since 2022
45counties served
40 ftmedian depth

Counties served

Wells drilled by Kohnen, Clarence, by county, across the full record.

CountyWells drilled
St. Clair County2,051
Clinton County1,626
Effingham County1,306
Fayette County1,224
Randolph County1,091
Madison County974
Marion County627
Bond County603
Washington County485
Jasper County438
Cumberland County431
Perry County321
Show all 45counties
Clay County319
Shelby County290
Richland County250
Jefferson County231
Coles County229
Monroe County196
Jackson County154
Montgomery County137
Clark County121
Edwards County65
Crawford County44
Franklin County35
Wayne County27
Douglas County24
White County19
Saline County15
Wabash County14
Macoupin County14
Vermilion County9
Hamilton County7
Pulaski County6
Lawrence County6
Greene County5
Williamson County4
Champaign County4
Jersey County3
Christian County3
Moultrie County3
Edgar County3
Union County2
Gallatin County1
Pike County1
Sangamon County1

Well characteristics

Across the wells Kohnen, Clarence has drilled, the median depth is 40 ft (middle half 31 ft–54 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 Kohnen, Clarence, straight from the public ISGS record:

"Records span 1900–2017" 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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