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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.
“Cooper”1 page
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The Committee 3 Report states that it is particularly noteworthy that 343,000 of the total of 373,000 bridges on county secondary roads, rural roads, and city streets were built prior to 1935. The burden of any corrective actions required will fall almost entirely on the state or local governments. The Federal Highway Administration has disseminated or made available copies of the Guide to the owners of all highway bridges in the United States. With respect to the bridge safety requirements of the Federal-Aid Highway Act of 1968, the Department of Transportation has taken the following action: 1. Issued the Guide, which contains bridge inspection information, to the owners of most highway bridges. 2. Issued the Committee 3 Report in January 1969 containing a bridge inventory, status of state and local inspection programs, and the status of railroad, toll, and Federally owned bridge safety programs. 3. Issued a Bridge Inspector's Training Manual in July 1970. 4. Issued the "National Bridge Inspection Standards" as proposed rulemaking on September 24, 1970. 5. Conducted training symposiums in all of the nine Federal Highway Administration Regions for state bridge maintenance personnel and Federal employees assigned to bridge inspection responsibilities. In addition, the American Association of State Highway Officials issued in July 1970 its "Manual for Maintenance Inspection of Bridges." The Safety Board has been advised by the Department of Transportation that the widest possible distribution will be made of the manuals, standards, and regulations developed in compliance with the Federal-Aid-Highway Act of 1968.
Document, cited by the archive. The PDF is mirrored here; the original link is above. The text was read from the page images by GLM-OCR; expect the odd misread word. 202 pages are in the text index: search them above, or from the library's search.