Which agency enforces the underground utilities marking law in Arizona?

• A. Arizona Department of Transportation
• B. Arizona Corporation Commission
• C. Environmental Protection Agency
• D. City Planning Department

Answer: (B)

Underground utility marking is about protecting digging projects from hitting buried pipes and cables. The state enforces the rules that require facilities to be marked before any excavation, and it can impose penalties for noncompliance. In Arizona, that enforcement rests with the Arizona Corporation Commission, which regulates public utilities and oversees damage-prevention requirements tied to digging and marking buried facilities. The other agencies don’t handle this authority: the Department of Transportation deals with roads and transportation infrastructure, the Environmental Protection Agency handles environmental regulations, and a City Planning Department focuses on zoning and land-use planning.