How many pipeline contractors are licensed in California?

California has 555 contractors with a C34 (Pipeline) license from the Contractors State License Board. 536 (97%) hold active licenses. SiteVetter checks each against SAM.gov, OSHA, DOL, and EPA databases.

What does a C34 license cover in California?

A California C34 license covers pipeline contractors for water, gas, and sewer lines. Any contractor performing pipeline work valued at $500 or more must hold this license. The CSLB issues and regulates all contractor licenses in the state.

What percentage of pipeline contractors have federal violations?

12.6% of California pipeline contractors (70 out of 555) have at least one record in federal databases. These include SAM.gov debarments, DOL wage violations, OSHA safety citations, and EPA environmental violations.

Verify Pipeline Contractors (C34) | CSLB + Federal Check

How to Verify a Pipeline Contractor (C34) in California

California requires all contractors performing pipeline work valued at $500+ to hold a valid CSLB C34 license. Of the 555 licensed pipeline contractors in the state, 97% currently hold active licenses and 12.6% have at least one federal compliance record.

Manual vetting takes 45+ minutes per contractor and routinely misses violations in databases most people don't know to check. SiteVetter runs CSLB status, SAM.gov debarment, DOL wage violations, OSHA safety citations, and EPA environmental records in seconds—creating a timestamped compliance artifact.

Verification Checklist for Pipeline Contractors

Verify the contractor license is active and in good standing
Request proof of insurance and bonding
Get at least 3 written quotes before selecting a contractor
Check federal databases: SAM.gov, OSHA, DOL, and EPA records
Confirm bond: California requires $25,000+ contractor bond (SB 607)

Why Verification Matters for Pipeline Work

Under California's "Controlling Employer" doctrine, general contractors face liability for subcontractor safety violations. For pipeline work specifically, 12.6% of licensed contractors have federal records that a standard CSLB license check wouldn't reveal. SiteVetter's 5-database check catches what a single-source verification misses.

Pipeline Contractor Verification

About C34 License

Pipeline Contractors

How to Verify a Pipeline Contractor (C34) in California

Verification Checklist for Pipeline Contractors

Why Verification Matters for Pipeline Work