Detailed plans, estimates, and specifications shall be submitted to the Board for approval before construction is commenced on a toll bridge or approaches under a permit granted under § 33.2-606. No such toll bridge shall be constructed until such plans, estimates, and specifications are approved by the Board. Access to such work shall be granted to the Board, the Commissioner of Highways, and authorized representatives of either at all times during construction. The permittee shall keep accurate records of the cost of such toll bridge and approaches and real and personal property used in the operation thereof and of all replacements and repairs and shall submit a copy to the Board.