August 1, Shortly after 6 pm, the IW Bridge collapses with motor that resulted in undersized gusset plates on some of Bridge ‘s main trusses. tural members could result in the collapse of the whole bridge. In the Bridge , IW Over Mississippi River, Fatigue Evaluation and. After the bridge’s collapse, the subsequent investigation that was conducted by the National . (IW over the Mississippi River).

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Minneapolis Bridge Collapse: 10 Years Later, Infrastructure Still In Decline : NPR

Sequential images of the collapse were taken by an outdoor security camera located at the col,apse lot entrance of the control facility for the Lower Saint Anthony Falls Lock and Bridhe.

Daubenberger says Minnesota bridges were identified as structurally deficient or fracture critical. Require Load Calculations before Use Naturally, without load rating calculations required, the State of Minnesota was left more in the dark regarding the viability of the bridge. Statutes, Laws, and Rules.

American Society of Civil Engineers. Educate on bridgs Importance of Gusset Plates Gusset plates were not considered as part of the load rating. Archived from the original on October 8, Approximately 75, other U.

Each column has a name engraved of someone lost, along with their story, some even written in their native language. Why did the error go unnoticed? Archived from the original PDF on December 22, Depending on what level of detail you need to be able to solve your problem, you have the option of demonstrating as few or as many causes as necessary by using a Cause Map to perform root cause analysis rather than listing causes or attempting to pinpoint a root cause and stopping at that.


Add Gusset Plates to Design Review This is another place where the gusset plates can be double-checked. Teams of officers were sent to hospitals to follow up with the injured, who had been transported to eight different medical facilities. The IW bridge ranked near the bottom of federal inspection ratings nationwide.

I-35W St. Anthony Falls Bridge

From Wikipedia, the free encyclopedia. In Minnesota, citizens and government officials alike sought access to MnDOT bridge inspection reports, Federal Highway Administration documents, and other records related to the history, maintenance, and safety of the 35W bridge — and all other bridges in the state.

N38 Nunnally, Patrick. Require Written Permission for Staging Materials on Bridges There is no policy requiring permission to stage materials on the bridge. This audio file was created from a revision of the article ” IW Mississippi River bridge ” dated July 7,and does not reflect subsequent edits to the article. University of Bfidge Press, Archived from the original on September 26, The fatalities and injuries are our major overall concern.

Retrieved August 1, Archived from the original on April 13, Only a few of the vehicles were submerged, but many people were stranded on the collapsed sections of the bridge. Archived from the original on August 10, The New York Times. A school bus carrying 63 children ended up resting precariously ocllapse the guardrail of the collapsed structure, near the burning semi-trailer truck.


Shortly after 6 pm, the IW Bridge collapses with motor vehicles on it at the time. At least 22 children were injured.

Minneapolis Interstate 35W Bridge Collapse – Minnesota Issues Resources Guides

If we name particular causes, but later dispute them and rule them out, we can cross them off the list so we remember what we considered early in the investigation. Archived from the original on March 24, In other projects Wikimedia Commons.

Pool 1created by Ford Dam, was closed to river navigation between mile markers and That load was estimated atpounds tonnesconsisting of sand, water and vehicles.

Archived from the original on August 19, By using this site, you co,lapse to the Terms of Use and Privacy Policy. On a separate measure, the IW bridge was rated “structurally deficient”, but was deemed to have met “minimum tolerable limits to be left in place as it is”.

A real Cause Map is starting to form.

Seventy collapsw of the traffic served by the bridge was downtown-bound. On March 17,a NTSB update states that excess construction weight was placed above the earlier-reported too-thin gusset plates.