Class Code 0251
Irrigation, Drainage Or Reclamation Works
Class Code 0251 applies to contractors and crews that build, repair or maintain irrigation, drainage or reclamation systems in California. This includes trenching for tile or pipe, canal and levee work, pump installation and groundwater recharge projects. The California pure premium rate for 0251 is $3.386 per $100 of payroll, which employers use as the starting point to estimate workers' comp costs.
What Class Code 0251 Covers
This classification covers hands-on construction and maintenance of irrigation systems, drainage tile and pipe installation, canal and ditch excavation, levee and reclamation earthworks, installation and servicing of pumps and pumping stations, and site dewatering operations. Work typically includes trenching and backfilling, pipe laying and jointing, grading and compaction, concrete headwall or inlet construction, and tying into agricultural or municipal water systems. It also includes reclamation projects that alter land for irrigation or flood control, such as rebuilding channels, installing sluices or constructing retention basins. Routine maintenance (clearing debris from canals, repairing broken laterals, replacing sand or gravel filters) is included when performed by the same contracting crew.
Who It Applies To
- Irrigation contractors installing residential, commercial or agricultural sprinkler and drip systems
- Drainage and tile-installation crews (agricultural and municipal drainage)
- Canal, levee and reclamation contractors rebuilding water conveyance or flood-control structures
- Pump station technicians and contractors who install or service submersible and surface pumps
- Municipal or county flood control and stormwater crews performing excavation and channel work
- Contractors performing dewatering, groundwater recharge or retention basin construction
Common Job Duties
- Excavating trenches for pipe, tile and storm drains using backhoes, trenchers and hand tools
- Laying, joining and bedding PVC, clay, concrete or corrugated metal drain pipe and tile
- Installing and wiring pumps, intake screens and control panels for pumping stations
- Shoring, sloping or benching trenches and installing trench boxes and other protective systems
- Grading banks, compacting soils, building headwalls and forming/placing concrete
- Dewatering pits and channels, operating pumps and coordinating bypass flows
- Inspecting and clearing canals, removing sediment and repairing erosion damage
Common Injury Risks
Understanding the $3.386 Rate
The pure premium rate of $3.386 per $100 of payroll represents the portion of workers' comp premium that covers expected claim costs for this class. To estimate the pure premium, multiply payroll by 0.03386; insurers then apply experience modification, policy credits or debits, underwriting adjustments, and administrative charges to produce the final premium you pay. Factors that affect the actual rate include your loss history, payroll accuracy, safety controls, use of subcontractors, and whether you participate in a PEO or group-rating program.
Cal/OSHA Compliance Requirements
Cal/OSHA standards most relevant to this work include excavation and trenching protective system requirements, competent person inspections, and confined space entry procedures for pump pits and culverts. Employers must also comply with electrical safety and utility‑location practices (locating and protecting underground lines), PPE rules, and lockout/tagout when servicing pumps. Maintaining written procedures, training workers on hazard recognition, and documenting competent person inspections are essential to satisfy California requirements.
How Key HR Helps Employers Under Class Code 0251
A PEO like Key HR can lower total workers' comp spend for 0251 employers by providing California-specific loss-control programs, on-site or virtual safety training, and proactive claims management to shorten indemnity durations. Key HR also handles payroll reporting and classification accuracy, monitors experience modification, connects employers to preferred medical and return-to-work networks, and ensures Cal/OSHA‑oriented safety plans and documentation are in place.
Get a QuoteFrequently Asked Questions
Does Class Code 0251 apply to both installation and routine maintenance of irrigation systems?
Yes. 0251 covers hands-on installation, repair and routine maintenance performed by the contracting crew on irrigation, drainage and reclamation systems; separately contracted office or design staff would be classified under different codes.
How can I reduce my workers' comp costs for crews that do trenching and pump work?
Reduce costs by implementing a trenching-and-excavation safety program with a designated competent person, using trench boxes/shoring, enforcing confined-space entry procedures, training on utility location and PPE use, and participating in return-to-work and preferred-provider networks to control claim duration.
Are subcontractors installing drainage tile my responsibility for classification and premiums?
If you hire subcontractors and report their payroll correctly, their work may be excluded from your payroll for premium calculation; however you must verify certificates of workers' comp insurance and ensure subcontractor classifications align with the actual work to avoid misclassification audits or liability.
Quick Facts
- Class Code
- 0251
- Classification
- Irrigation, Drainage Or Reclamation Works
- Pure Premium Rate
- $3.386 / $100 payroll
- Effective Date
- September 1, 2026
- Source
- WCIRB Approved Filing
Manage Workers' Comp Through a PEO
Key HR provides pay-as-you-go workers' comp for California employers — no large deposits, no audits, better rates.
Get a Quoteor call (800) 922-4133Ready to Simplify Workers' Comp for Class Code 0251?
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