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Contractors State License Board9821 Business Park Drive
Sacramento, CA 95827
Phone (800) 321-CSLB
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General Info- Library
- C61 - Limited Specialty
- D56 - Trenching Only Contractor
D56 - Trenching Only Contractor
California Code of Regulations
Division 8, Title 16, Article 3. Classification
A trenching contractor is a limited specialty contractor whose contracting business is trenching only for foundations, pipelines, conduit and related trenching work.