Deteriorating Bridge Condition — Early 2015

  • While the current bridge is capable of safely supporting all legal loads, the structure is reaching the end of its lifespan and needs to be replaced
  • The overall structure is considered to be in fair condition, one step short of poor
  • The existing deck is over 50 years old, has exceeded its expected useful life, and requires ongoing lane closing for repairs of deck spall
  • The top of the deck is riddled with numerous transverse cracks
  • Numerous concrete patches have been made to areas of the deck and several of these are now deteriorated
  • The underside of the deck exhibits random spalls and transverse cracking with exposed and corroded reinforcement up to 15 percent of the total deck area
  • The deck deterioration is accelerating quickly with some recent spalls penetrating the full depth of the deck
  • The supporting steel superstructure is in fair condition, one step short of poor
  • Several stringers (steel support members) exhibit horizontal cracks in the web and there are some material losses in bottom flanges adjacent to retrofit bearings
  • Other areas of concern include a cracked tie plate, sheared anchor bolts, moderate surface rust in hangers and pin washers, and minor isolated material losses arrested with pin in hanger plates