Patroon Island Bridge

The Patroon Island Bridge is a major crossing of the Hudson River in Albany, New York. The bridge carries Interstate 90, in the east-west direction, over the Hudson River between Albany and Rensselaer Counties.

It has been in service since 1968; however, some structural repairs were made in 1992. The bridge consists of ten spans. Seven spans are considered the main spans and consist of steel trusses and concrete decks. The other three spans are considered approach spans, which are supported by plate girders. The main span over the river-shipping channel is 375 feet long and 89 feet wide, and the overall bridge length is 1,795 feet . There is an estimated 60 feet of clearance for shipping on the Hudson River below, which changes with the local tide. Today's replacement cost is estimated to be between $80 and $100 million. The bridge has an HS Inventory load rating of 35 short tons , and is inspected annually. The average daily traffic count was 70,787 in 1998 with a 4.5 percent estimated traffic growth during the life of the bridge.

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