...
Arizona operates an OSHA-approved State Plan covering most private sector workers and all state and local government workers. The Arizona Division of Occupational Safety and Health (ADOSH) is part of the Industrial Commission of Arizona (ICA).
Underground facilities
Arizona has a “one-call notification center” which is an organization of owners or operators of underground facilities (i.e., utilities such as water, sewage, electronics, telephonic, telegraph, electric, oil, gas, etc.) that provides a telephone number notification service for the purpose of receiving and distributing to its members advance notifications from persons regarding planned excavations. After receiving notification of a planned excavation, members mut locate and mark their facilities to prevent damage, interruption of service, and worker injury. The rules are found in A.R.S. §§ 40-360.21 -- 40-360.32.