WILLIAMS EXCAVATION INC
California contractor license #435145 · Mariposa, Mariposa County
License
- License number
- 435145
- Status
- Clear
- Classifications
- A General Engineering Contractor
- HAZ Hazardous Substance Removal Certification
- Business type
- Corporation
- Issued
- Feb 15, 1983
- Expires
- Mar 31, 2028
- Workers' compensation
- Workers' Compensation Insurance — Benchmark Insurance Company
- Contractor's bond
- $25,000 — American Contractors Indemnity Company
- DIR public works registration
- Registered through Jun 30, 2029
From the California Contractors State License Board (CSLB) public license file, last updated Jun 16, 2026. Verify license #435145 on CSLB's License Check.
California public works
WILLIAMS EXCAVATION INC appears on 10 public works projects registered with the California Department of Industrial Relations, 2 of them as the prime contractor, for 4 awarding bodies between 2023 and 2025. Projects it led total $327,264 in reported contract value.
| Date | Project | Awarding body | Role | Contract amount |
|---|---|---|---|---|
| May 29, 2025 | River Grove IIOther | Self-Help Enterprises_ | Subcontractor | $18,255,545 |
| Apr 10, 2025 | LDP Asphalt RepairPaving & streets | Mariposa County Unified | Prime | $196,900 |
| Feb 11, 2025 | PWFA-Midpines Fire Station/Park Well RepWater | Mariposa County Public Works | Subcontractor | $100,000 |
| Dec 3, 2024 | Indian Peak Temporary BridgeBridges & structures | Mariposa County Public Works | Prime | $130,364 |
| Sep 20, 2024 | French Fire Debris RemovalBuildings & facilities | Mariposa County Unified | Subcontractor | $75,440 |
| May 28, 2024 | Valve Replacement Fire Hydrant AirportWater | County of Mariposa, Department of Public Works | Subcontractor | — |
| May 20, 2024 | Coulterville Test Wells, PadsWater | County of Mariposa, Department of Public Works | Subcontractor | — |
| May 14, 2024 | Coulterville Drought Project Phase IIOther | Mariposa County Public Works | Subcontractor | $1,551,596 |
| Jan 8, 2024 | Natural Disaster Water Storage MitigatioWater | County of Mariposa, Department of Public Works | Subcontractor | — |
| Jun 15, 2023 | River GroveOther | Self-Help Enterprises_ | Subcontractor | — |
Most recent 10 of 10. 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 Mariposa, Department of Public Works · 3 projects
- Mariposa County Public Works · 3 projects
- Mariposa County Unified · 2 projects
- Self-Help Enterprises_ · 2 projects
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