Collapse of U.S. 35 Highway Bridge, Point Pleasant, West Virginia, December 15, 1967 (HAR-71/01)

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.

## APPENDIX B

NATIONAL BUREAU OF STANDARDS TEST RESULTS

Table A2. (Cont.) Hardness Test Results, Eye C9, Segment 1.

Distance from hole	Vickers hardness number
Spec.A	Spec.B	Spec.C
0.5mm	0.02in.	256	238	270
1.0	.04	254	236	268
1.5	.06	253	236	274
2.0	.08	258 270
2.5	.10	256	240	268
3.0	.12	254 274
3.5	.14	253	236	266
4.0	.16	251 268
4.5	.18	254	233	266
8.5	.33 232
15.5	.61 235

Note: All measurements on specimens A and C were made approximately 2.5 mm (0.10 in.) from the face of the bar.