Va. Code § 21-253
In order to carry out and effectuate the purposes of the commission, every commission is authorized to construct and operate its trunk, intercepting and outlet sewers, conduits and pipelines, along, over, under and in any streets, alleys, highways and other public places within the district. In so constructing its facilities, it shall see that the public use of such streets, alleys, highways and other public places is not unnecessarily interrupted or interfered with and that such streets, alleys, highways and other public places are restored to their former usefulness and condition within a reasonable time; to this end the commission shall cooperate with the Commonwealth Transportation Board and the appropriate officers of the respective counties, cities and towns having an interest in such matters.
Va. Code § 21-253