A nondestructive inspection of the Commodore Barry Bridge deck, including the Route 130 bridge deck, the elevated sections of the access ramps extending to PA Route 13, and the access ramps from PA Route 291, in Logan Township, NJ was performed using Ground Penetrating Radar (GPR) combined with High Resolution Imaging (HRI) of the bridge deck surface, both of which were performed at the posted highway speed. The objectives of the GPR inspection were to provide an up‐to‐date assessment of the physical condition of the concrete deck, including the overall quantity of corrosion induced delaminated concrete within the bridge as well as the depth to the top reinforcement.

A sample of some of the deliverables that we provided from the inspection are shown below.

GPR Delamination Probability Plan-View Mapping

GPR Reinforcement Depth Plan-View Mapping

Surface High Resolution Imaging Plan-View

The use of these multiple mappings provide a comprehensive package of information on the condition of the inspected bridge deck.  Quantities of delaminated concrete and depth to the reinforcing steel along with a detailed image of the deck surface at the time of the survey add invaluable information to the bridge owners without the need to close down any lanes on the bridge. This saves time and money and removes the inconvenience of traffic delays.