Cofferdam Unwatering Corporation
Recorded as the driller on 32 water wells across 13 California counties in the California Department of Water Resources (DWR) Well Completion Reports database, most in Sacramento County. Well-log records span 1977–1985.
Counties served
Wells drilled by Cofferdam Unwatering Corporation, by county, across the full record.
| County | Wells drilled |
|---|---|
| Sacramento County | 12 |
| San Bernardino County | 4 |
| Los Angeles County | 3 |
| El Dorado County | 3 |
| Santa Clara County | 2 |
| Yuba County | 1 |
| San Joaquin County | 1 |
| Orange County | 1 |
| Monterey County | 1 |
| San Mateo County | 1 |
| Sonoma County | 1 |
| Yolo County | 1 |
Show all 13 counties
| Napa County | 1 |
Well characteristics
Across the wells Cofferdam Unwatering Corporation has drilled, the median depth is 503 ft (middle half 310 ft–582 ft), median tested yield 25 gpm, and median static water level 40 ft below ground surface. These summarize the company's own filed logs, not a marketing claim.
Original drilling logs
Recent well logs filed by Cofferdam Unwatering Corporation, straight from the public DWR record:
"Records span 1977–1985" 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 Sacramento County, including Cofferdam Unwatering Corporation.
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