Cal. Pub. Cont. Code § 21020.8

Any work or improvements provided for in the act may be located, constructed, and maintained in, along, or across any public road or highway in the County of Orange, in the manner as to afford security for life and property, but the board of supervisors of the district shall restore or cause to be restored any public road or highway to its former state as near as may be, so as not to impair its usefulness.