Documentation & Resources

Standard Guideline for Investigating and Documenting Existing Utilities. Learn about Quality Levels (QL-A through QL-D) and professional SUE standards.

Standard Guideline for Recording and Exchanging Utility Infrastructure Data. Learn about 3D-ready data, standardized attributes, and digital as-built deliverables.

Canada's national standard for mapping underground utility infrastructure. Learn about positional accuracy classes, attributes, and record-keeping requirements.

Surface geophysics techniques for "designating" underground utilities. Learn about EM locating, GPR, sonde techniques, and professional workflow requirements.

Physical exposure techniques for "daylighting" underground utilities. Learn about hydrovac, air-vac, test holes, and precise 3D positioning requirements.

Feature survey and correlation techniques for inferring utility alignments. Learn about surveying visible features, records correlation, and professional documentation requirements.

Records research and documentation techniques for planning-grade utility information. Learn about systematic records collection, source documentation, and proper escalation criteria.

The U.S. industry's consensus playbook for preventing damage to underground utilities—covering the full lifecycle from an 811 locate request, to facility marking, to safe excavation and jobsite close-out.

The uniform color code standard for marking underground utilities. Learn about the eight standardized colors that ensure consistent utility identification across all construction sites.

Canada's consensus, nationally harmonized manual for preventing damage to underground infrastructure. Version 5.0 (March 2024) covers the complete damage prevention lifecycle.

Canada's national consensus standard for damage prevention and protection of underground infrastructure. Defines end-to-end damage-prevention processes, roles, and communications.