On precast concrete beam structures, contractors and engineers have been concerned about the impact of jack hammers on the integrity of these beams during restoration projects. Penn DOT specified a maximum jackhammer size of 30 pounds for removal of the deck. The general contractor thought of hydrodemolition as way of both satisfying the desired production rates and DOT requirements. Not only was the use of hydrodemolition faster, the high pressure water virtually eliminated the chance of punching through the precast beams. As an added benefit hydrodemolition, unlike jackhammers, doesn't transmit vibrations through a structure that could potentially cause micro-fractures in the precast beams. Hydrodemolition was used successfully, and to the contractor's satisfaction, to completely remove the deck down to the hoops on the main spans of the bridge while aiding in a saw and lift operation on the approaches.