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 A3. (Cont.) Hardness Test Results, Eye C3, Segment O

Specimen V, Plane 0.6 in. from hole surface
Distance
from south
face	Vickers hardness numbers
0.5mm	0.02in.	221
1	.04	233
2	.08	247
3	.12	254
4	.16	256
5	.20	258
6	.24	256
7	.28	256
8	.31	253
9	.35	249
10	.43	247
11	.43	247
12	.47	243
13	.51	240
14	.55	242
15	.59	242
16	.63	235
17	.67	238
18	.71	235