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Whitworth source library

Manuals, training, and required references

These materials are organized from the supplied company manuals. Read the source document for complete requirements and use the authenticated sign-off workflow once each item is published to Supabase.

Safety program

Accident Prevention Program

Effective date: June 2026

Company- and site-specific safety program for excavation, trenching, utilities, equipment, traffic, PPE, reporting, and daily safety communication.

  • • Competent-person excavation and trench inspections
  • • 811 utility locating and tolerance-zone work
  • • Confined space, pipe, septic, and storm-water work
  • • Spotter, signal person, traffic control, and public protection
  • • Incident, near-miss, and accident investigation procedures
  • • PPE, training, site security, and daily pre-shift briefings
Download source document
Training manual

Whitworth Master Manual + Section 8

Twelve-section recurring training schedule covering driving, dump trucks, equipment, jobsites, culture, weather, and annual review.

  • • Vehicle and driving safety
  • • Dump truck, trailer, and heavy equipment safety
  • • Jobsite, pedestrian, backing, and spotter safety
  • • Company culture and safety awareness
  • • Weather and seasonal hazards
  • • Mixed review, reinforcement, and annual refresher
Download source document

Supplied references

Regulations, handbook, and utility policy

regulatory

OSHA Excavation, Sloping & Shoring Regulations

Supplied OSHA excavation regulation reference for sloping, shoring, protective systems, and competent-person requirements.

  • • Excavation and trenching requirements
  • • Sloping and benching
  • • Shoring and shielding
  • • Competent-person inspections
Open supplied PDF
regulatory

OSHA Excavation Quick Card

Field quick-reference card supplied for excavation and trench safety reminders.

  • • Protective systems
  • • Access and egress
  • • Spoil placement
  • • Daily inspection reminders
Open supplied PDF
handbook

Whitworth Employee Handbook 2025

Supplied employee handbook for handbook review and acknowledgement workflows.

  • • Employee policies
  • • Workplace expectations
  • • Safety and conduct
  • • Acknowledgement source
Open supplied PDF
site_specific

Utility Locate Policy

Supplied Whitworth utility locating policy for planning and documenting excavation near existing utilities.

  • • Locate request process
  • • Marking and verification
  • • Tolerance-zone work
  • • Documentation and escalation
Open supplied PDF

Training plan

12-section recurring schedule

Section 1

Vehicle & Driving Safety

Pre-trip inspections, space management, and safe vehicle operation.

Section 2

Vehicle & Driving Safety (Continued)

Driving-space management and defensive driving reinforcement.

Section 3

Dump Truck & Equipment Safety

Backing, spotters, hand signals, and equipment-specific hazards.

Section 4

Dump Truck & Equipment Safety (Continued)

Load securement, tarping, tires, hydraulics, and inspections.

Section 5

Jobsite Safety

Pedestrian visibility, internal traffic control, and ground-worker protection.

Section 6

Jobsite Safety (Continued)

Active-site communication and practical hazard controls.

Section 7

Company Culture & Safety Awareness

Shared accountability, stop-work authority, and reporting.

Section 8

Weather & Seasonal Hazards

Weather-driven changes to equipment, ground, and work conditions.

Section 9

Mixed Review & Reinforcement

Backing safety and pedestrian/ground-worker visibility.

Section 10

Dump Truck & Equipment Safety Review

Rollover prevention, spotters, tires, hydraulics, and stability.

Section 11

Jobsite & Pedestrian Safety Focus

Internal traffic control plans and spotter communication.

Section 12

Full Year Review & Annual Refresher

Annual reinforcement of the complete safety program.

External references

OSHA

OSHA Required Poster

Official workplace safety and health poster requirements.

Washington L&I

Washington workplace posters

State and federal poster guidance for Washington employers.

Utility locate

Call Before You Dig

Request utility locates before excavation or ground disturbance.

Washington law

Washington excavation safety rules

Reference RCW and WAC requirements; confirm the current rule before work.