Bertram Drilling Inc
License 703688 Active
- Geothermal
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Holds an active California C-57 Well Drilling contractor license (CSLB license 439746, corporation, first issued 1983, current through 2027-07-31). The C-57 classification covers drilling, casing, cleaning, repairing and destroying water wells and installing and repairing well pumps. Filed 594 well completion reports with the Department of Water Resources since 2016 (428 new wells, 264 of them domestic supply; 165 well destructions), most recently in September 2026, mostly in Napa, Sonoma and Solano counties.
License 703688 Active
License 487027 Active
License 780357 Active