Background: GPR Data was contacted by Graham Construction to help assess the condition of two bridges along Interstate 90. Graham (and WDOT) wanted to determine if the bridge needed a full removal, deck replacement, or concrete overlay rehabilitation.
GPR Data’s Solution: Graham and WDOT faced a difficult decision and it was decided early on that the more information GPR Data could provide the easier that decisions would become. After scanning the deck of both bridges we provided overlays which displayed the areas of delamination, and deterioration was well as the depth of cover from the top and bottom bars. After reviewing our data with WDOT and Graham engineers they determined that a concrete overlay rehabilitation was the best course of action for both bridges.