Tanko Bros Inc.
Recorded as the driller on 2,617 water wells across 13 California counties in the California Department of Water Resources (DWR) Well Completion Reports database, most in Tuolumne County. Well-log records span 1945–2022.
Counties served
Wells drilled by Tanko Bros Inc., by county, across the full record.
| County | Wells drilled |
|---|---|
| Tuolumne County | 1,891 |
| Mariposa County | 407 |
| Calaveras County | 219 |
| Stanislaus County | 49 |
| Placer County | 16 |
| El Dorado County | 13 |
| Amador County | 8 |
| Nevada County | 5 |
| Merced County | 3 |
| Alpine County | 2 |
| Mono County | 1 |
| San Joaquin County | 1 |
Show all 13 counties
| Yuba County | 1 |
Well characteristics
Across the wells Tanko Bros Inc. has drilled, the median depth is 300 ft (middle half 200 ft–500 ft), median tested yield 22 gpm, and median static water level 60 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.
Original drilling logs
Recent well logs filed by Tanko Bros Inc., straight from the public DWR record:
"Records span 1945–2022" refers to the earliest and latest well logs attributed to this company in the DWR 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 Tuolumne County, including Tanko Bros Inc..
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