MERTENS DRILLING
California contractor license #1073932 · Petaluma, Sonoma County
License
- License number
- 1073932
- Status
- Clear
- Classifications
- C-61/D-30 Pile Driving and Pressure Foundation Jacking
- Business type
- Corporation
- Issued
- Mar 11, 2021
- Expires
- Nov 30, 2028
- Workers' compensation
- Workers' Compensation Insurance — State Compensation Insurance Fund
- Contractor's bond
- $25,000 — American Contractors Indemnity Company
- DIR public works registration
- Registered through Jun 30, 2027
From the California Contractors State License Board (CSLB) public license file, last updated Oct 3, 2026. Verify license #1073932 on CSLB's License Check.
California public works
MERTENS DRILLING appears on 31 public works projects registered with the California Department of Industrial Relations, for 21 awarding bodies between 2019 and 2026.
| Date | Project | Awarding body | Role | Contract amount |
|---|---|---|---|---|
| Jul 28, 2026 | 550 Wall Rd Landslide Repairs, RDS 26-38Bridges & structures | Napa County Public Works | Subcontractor | $567,058 |
| Mar 11, 2026 | EFA - 01A6648Storm drain & flood control | California Department of Transportation | Subcontractor | $2,750,000 |
| Mar 3, 2026 | 04-Mrn-131-2.0Other | California Department of Transportation (Caltrans) | Subcontractor | $1,273,445 |
| Nov 18, 2025 | East Cotati Soundwall ReplacementDemolition & site work | City of Rohnert Park | Subcontractor | $342,500 |
| Oct 17, 2025 | Highland TankStorm drain & flood control | San Lorenzo Valley Water District | Subcontractor | $1,033,099 |
| Aug 21, 2025 | Reclamation Pump Station E Bldg ReplaceWater | City of Santa Rosa | Subcontractor | $1,033,261 |
| Jun 24, 2025 | Wildcat Canyon Road-Slope RepairPaving & streets | Contra Costa County Public Works Department | Subcontractor | $2,090,191 |
| May 30, 2025 | Eureka Canyon Road PM 0.35Storm drain & flood control | County of Santa Cruz DPW | Subcontractor | $638,825 |
| May 15, 2025 | Rio Lindo Ave PM 12.28 Storm Damge RepaiStorm drain & flood control | County of Sonoma – SPI _ Sonoma Public Infrastructure | Subcontractor | $699,647 |
| May 6, 2025 | Upper East Zayante Rd PM 1.68 & 2.51Traffic & signals | County of Santa Cruz DPW | Subcontractor | $638,965 |
| May 6, 2025 | Winter Storms 2024-25 Damaged Site - CavStorm drain & flood control | County of Sonoma – SPI _ Sonoma Public Infrastructure | Subcontractor | $2,308,365 |
| Apr 3, 2025 | Tudor Flood Risk Reduction ProjectStorm drain & flood control | Sutter Butte Flood Control Agency | Subcontractor | $8,894,230 |
| Mar 17, 2025 | JMC Sterile Processing Dept.Water | UC San Diego | Subcontractor | $2,495,660 |
| Mar 11, 2025 | Miller Cutoff Road PM 0.47 & 0.49Traffic & signals | County of Santa Cruz DPW | Subcontractor | $668,495 |
| Dec 10, 2024 | Porter Creek BridgeBridges & structures | County of Sonoma - Regional Parks | Subcontractor | $677,000 |
| Nov 26, 2024 | HIRSCHDALE ROAD BRIDGESBridges & structures | Nevada County Department of Public Works | Subcontractor | $13,522,228 |
| Aug 3, 2024 | 03-Pla,Nev-20,80-VARBridges & structures | California Department of Transportation (Caltrans) | Subcontractor | — |
| Jul 12, 2024 | Beach Force Main Rehabilitation ProjectSewer & wastewater | Sausalito-Marin City Sanitary District | Subcontractor | $4,181,000 |
| Jul 8, 2024 | Oakville Grade Rd MPM 1.35 Storm Repair,Storm drain & flood control | Napa County Public Works | Subcontractor | — |
| Jun 24, 2024 | Meas Y - Group 1A PlainfieldPainting & flooring | Woodland Joint Unified School District | Subcontractor | $2,620,258 |
| Jun 24, 2024 | Socrates Mine Road Landslide Repair ProjBridges & structures | Lake County Public Works | Subcontractor | — |
| Jun 17, 2024 | San Rafael High School Aquatic Center PrBuildings & facilities | San Rafael City Schools | Subcontractor | — |
| May 28, 2024 | GEYSERS RD BRIDGE OVER BIG SULPHUR CREEKBridges & structures | County of Sonoma – SPI _ Sonoma Public Infrastructure | Subcontractor | — |
| Feb 9, 2024 | Donaldson Way Campus UpgradesBuildings & facilities | Napa Valley Unified School District | Subcontractor | $14,428,073 |
| Oct 10, 2023 | Thornton Wastewater Improvements ProjectSewer & wastewater | Housing Authority of the County of San Joaquin | Subcontractor | — |
Most recent 25 of 31. Contract amounts are the whole project's, as the awarding body reported them to DIR (reported since July 2024); a role is "Prime" when the awarding body registered the contractor on the project.
Awarding bodies it works for most
- County of Santa Cruz DPW · 4 projects
- California Department of Transportation (Caltrans) · 4 projects
- County of Sonoma – SPI _ Sonoma Public Infrastructure · 3 projects
- County of Marin Department of Public Works · 2 projects
- Napa County Public Works · 2 projects
- Napa Valley Unified School District · 1 project
- San Rafael City Schools · 1 project
- Lake County Public Works · 1 project
- City of Santa Rosa · 1 project
- Nevada County Department of Public Works · 1 project
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