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Dal Porto-Shell 1
Plugged Dry hole well
| API number | 04-013-00170 |
|---|---|
| Operator | Helm Co. & Robert Sumpf |
| County | Contra Costa, California |
| Field | River Break Gas |
| Spudded | 1965-03-18 |
| Surface location | 38.004242, -121.720032 · wells within 1 mile |
| State record | California Geologic Energy Management Division (CalGEM) ↗ |
| Data as of | 2026-10-19 |
From California Geologic Energy Management Division (CalGEM) public records. Verify with the state before relying on this information.