Notwithstanding anything which may be contained in this act to the contrary, public agencies and their contractors engaged in work within the public right-of-way which work is a pre-engineered project, certified project or routine maintenance shall be exempt from the provisions of this act. Provided, a public agency contractor, prior to engaging in routine maintenance, shall take reasonable steps to determine the location of underground facilities in or near the proposed area of work. Reasonable steps may include utilization of the statewide one-call notification center procedures as provided for in Section 142.6 of this title.
Okla. Stat. tit. 63, § 142.11