Understanding Underground Utility Safety: Your Guide to Safe Digging

Why Underground Utilities Matter

Underground utilities form the invisible infrastructure that powers our daily lives. These hidden networks of pipes and cables carry essential services like electricity, water, gas, and telecommunications to homes and businesses. When these systems are damaged, entire neighborhoods can lose vital services, creating safety hazards and disrupting daily life.

Utilities Underground Location Center

Call Before You Dig serves as a crucial intermediary between property owners and utility companies. By calling 811 or 1-800-424-5555, you connect with professionals who coordinate with all local utility providers to ensure safe excavation. This service operates 24 hours a day, seven days a week, making it convenient for both homeowners and contractors to comply with safety requirements.

The Two-Day Notice Requirement

The two-business-day waiting period serves an essential purpose. During this time, each utility company sends qualified technicians to your property to precisely mark the location of their underground infrastructure. These technicians use sophisticated equipment and detailed utility maps to ensure accurate marking, helping you avoid costly and dangerous accidents.

Projects Requiring Utility Location

Any project that disturbs the ground requires utility marking, regardless of depth. This includes:

• Landscaping projects such as planting trees or installing irrigation systems.
• Fence installation, including both shallow post holes and deeper foundation work.
• Construction projects ranging from home additions to new driveways.
• Sewer work, which often requires deep excavation.
• Even seemingly minor projects like installing mailbox posts or garden features.

The Marking Process

When utility companies respond to your request, they use the American Public Works Association Uniform Color Code. This standardized system uses specific colors to identify different types of utilities:

• Red: Electric power lines, cables or conduits, and lighting cables.
• Yellow: Gas, oil, steam, petroleum, or other hazardous liquid or gaseous materials.
• Orange: Communications, cable TV, alarm or signal lines, cables, or conduits.
• Blue: Water, irrigation, and slurry lines.
• Green: Sewers, storm sewer facilities, or other drain lines.
• White: Proposed excavation
• Pink: Temporary survey markings.
• Purple: Reclaimed water, irrigation, and slurry lines.

Legal and Financial Implications

State law (RCW 19.122) requires utility location before digging for several important reasons. Beyond the obvious safety concerns, damaging underground utilities can:

• Create hazardous conditions for workers and nearby residents.
• Result in significant repair costs that become your responsibility.
• Lead to service interruptions affecting hundreds or thousands of people.
• Result in fines or legal penalties for non-compliance with marking requirements.

When to Take Action

You should contact Call Before You Dig if any of these conditions apply:

1. You live in an area where utilities are underground (most modern developments have underground services).
   
   
2. You've noticed utility markers, warning signs, or equipment boxes in your area.
   
   
3. You're planning any project that requires breaking ground.
   
   
4. You're unsure about the presence of underground utilities (it's always better to verify).

Prevention and Best Practices

Even after utilities are marked, follow these safety guidelines:

• Respect the marks: Consider them approximate locations and dig carefully within 24 inches of any marked line.
  
  
• Maintain visibility: Keep utility marks visible and request re-marking if they fade before work is complete.
  
  
• Document the marks: Consider photographing the markings for reference.
  
  
• Hand dig near utilities: Use manual tools rather than power equipment when working close to marked lines

Remember: Taking the time to have utilities marked is a small investment that prevents costly accidents and protects vital community infrastructure. The service is free, readily available, and could save lives. 

Dial 811 or 1-800-424-5555

For more information, please visit the Utilities Underground Location Center website.