Jump to main content.
Minnesota Department of Transportation Go to 511
MnDOT A to Z | General Contacts | Simple Search | Advanced Search
Workzone at night
 

News Release

Nov. 14, 2008
 

Contacts

Location

Minnesota Department of Transportation
Office of Communications
395 John Ireland Blvd.
Mail Stop 150
St. Paul, MN 55155-1899

Additional Information

 

Search Statewide News

 

 

National Transportation Safety Board concludes investigation into I-35W bridge collapse

Cites design error in original plans as probable cause

 

ST. PAUL, Minn. – The National Transportation Safety Board today released the results of its investigation into the cause of the Interstate 35W Bridge collapse on Aug. 1, 2007 and made recommendations for changes in industry practice to prevent a similar tragedy from occurring on the nation’s other bridges.

 

During a two-day public hearing that began Thursday, Nov. 13, the NTSB cited an error in the original design of the gusset plates as the probable cause of the collapse. Construction on the bridge began in 1965 and it opened to traffic in 1967.

 

“The Minnesota Department of Transportation appreciates the thorough investigation that the NTSB undertook during the past 16 months, and we respect the professional manner in which the NTSB investigative staff performed this very difficult assignment,” said Tom Sorel, Mn/DOT commissioner.

 

“It was critical to have a definitive and complete review of the accident and history of the bridge. Only through such a process can we learn and make improvements,” he said.

 

As the NTSB released information during the last year, Mn/DOT took actions in response to their findings, including: