Va. Code § 56-258
The Commissioner of Highways or the board of supervisors or other governing body in any county that has withdrawn its county roads from the secondary system of state highways is authorized to enter into contract with water companies or other corporations or persons to lay water pipelines along the rights-of-way of public roadways and turnpikes. Such water pipelines shall be laid in such manner as not to obstruct passage thereon when completed, and in any such contract the Commissioner of Highways or any such board of supervisors or other governing body, as the case may be, shall provide that the parties so laying such pipelines shall, at all times, exercise reasonable care not to obstruct such roadways while laying, repairing or replacing such pipe.
Va. Code § 56-258