Okla. Stat. tit. 63, § 63-142.7: Use of powered or mechanized equipment - Exemptions

A. Except as provided in subsection B of this section, powered

or mechanized equipment shall not be used directly over marked

routes of underground facilities until the precise location of the

underground facilities has been determined by the excavator, and

then only after the facilities have been exposed and properly

protected to avoid damage to them. If the precise location of the

underground facilities cannot be determined by the excavator, the

operator thereof shall be notified by the excavator so that the

operator can determine the precise location of the underground

facilities prior to continuing excavation or demolition.

B. The only exception to the prohibition of the use of powered

or mechanized equipment directly over marked routes of underground

facilities shall be for the removal of pavement or masonry, and then

only to the depth of such pavement or masonry.