A few weeks ago I did a routine inspection of a concrete encased steel beam bridge. The bridge is located in Tiverton RI. The five concrete encased beams span 35.1'. To access the underside of the bridge we used a small boat which halfway through the inspection sprung a leak. The remaining time was spent in waders, which happened to also have leaks.
The beams exhibit spalling to the encasement along the undersides exposing the steel bottom flanges. The exposed steel bottom flanges have areas of section loss up to 44% of the original thickness. We were able to find the remaining thickness with a D-meter after spending some time cleaning the surface and making it smooth enough the get a reading.
The concrete deck has several spalls in each bay with exposed and severed rebar.
Just upstream from the bridge there is a spillway with a fish ladder. The damned off pond has large schools of fish and it was a crazy site since they were probably farmed fish and were not afraid of people.
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