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Damage Prevention
Unimark System
The final solution to underground utility identification
Welcome to the underground!
The APWA, through its Utility Location and Coordination Council (ULCC) has developed a uniform color code for marking underground utility lines to enhance worker safety and minimize damage during construction. Excavators and operators now generally recognize the uniform colors and their value in identifying the nature of subsurface utilities present on job sites. Worker injury or fatality and damage to utilities and similar lines can be further minimized if permanent above ground markings that identify and warn of important underground lines were color coded.The APWA further urges that the United States and Canadian governmental agencies adopt this ULCC permanent color marking in their laws, codes of practice and regulations.