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This is the final highway accident report (NTSB-HAR-71-1) from the National Transportation Safety Board, adopted in December 1970. It covers the collapse of the U.S. 35 bridge between Point Pleasant, West Virginia, and Kanauga, Ohio, on December 15, 1967, which killed 46 people. The Board found that the cause was a cleavage fracture in eyebar 330 at joint C13N. That fracture grew from a flaw produced over 40 years by stress corrosion and corrosion fatigue, in a spot that could not be seen or found by inspection.
Boston, Massachusetts E. Cecil Revere Boston, 1849, 1960 Kenestle Properties (CO) Segment B51) Specimen No.2) Strain Rate to Yield Yield Strength at 0.2% Offset, ks1 Tensile Strength, ks1 Elongation in 1 Inch, $ \% $ Reduction of Area, $ \% $ Formal5) 87.5 119.8 18.0 18.0 54.4 Layer A(6) 6 83.5 86.5 118.3 121.8 18.0 18.0 52.8 Layer B(6) 14 83.5 119.6 18.0 18.5 55.5 Layer A 36 Static 68.5 120.3 118.8 119.0 18.0 19.0 52.4 Center 10 Static 83.5 71.6 119.3 19.0 19.0 47.6 17 Static 83.5 68.6 118.8 19.0 19.0 48.0 21 Static 74.1 74.1 118.7 19.0 19.0 49.6 25 Static 86.7 117.8 19.0 19.0 54.4 Layer B 29 Static 83.7 120.2 18.0 20.0 50.8 32 Static 54.5 40 Static 6) Layers A and B are adjacent to opposite surfaces, and 0.05 inch was removed to dress up surfaces.
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