The photo above is the i35w bridge taken in november of 2006, about 8 months before the collapse. I35w bridge collapse journal of bridge engineering. Lessons learned from this case will contribute to engineering knowledge and should prevent such disasters in the future. Study of the i35w highway bridge collapse mechanism miguel a. If you were facilitating a cause mapping session all of those who might have knowledge of the i35 bridge collapse an asked for the reason it fell, you would hear. There was no known failure in the actual materials of the i35w bridge many other factors played into the failure, but. I35w bridge collapse and response minneapolis, minnesota august 1, 2007.
Two years after one of the nations biggest bridge disasters, transportation officials say the nations bridges are safe. Failure in structural steels and overview of i35w bridge. Even for those who were nowhere near the bridge when it. Friends and families of those who died in the 2007 bridge collapse gathered monday to dedicate the memorial. Professionalismurs and the i35 bridge wikibooks, open.
Kimberly brown was among the survivors when the i35w bridge collapsed in minneapolis 11 years ago. Cnbc s michelle carusocabrera meets with one family that. While the explanation for this bridges collapse may seem obvious up to this point, it would not be complete without understanding sir isaac newtons third law of motion. Kapil khandelwal, university of notre dame introduction research into the study of the collapse of steel bridges has become popular with the recent i. Analysis of the 2007 interstate35 bridge collapse in. Here is my take on their presentations these arent bullet points from their slides. An aerial view shows the collapsed i35w bridge aug.
This work was conducted under the supervision of the ntsb national transportation and safety board, mndot bridge department and. I35 bridge collapses in minneapolis on august 1, 2007, an eightlane bridge across the mississippi river in minneapolis collapsed during the evening rush hour, killing people. After the collapse, the bridge was lodged in the river where, under minnesota statute, the hennepin county. Remembering the i35w bridge collapse 10 years later the i35w bridge was one of minnesotas busiest, carrying 140,000 cars a day over the mississippi river. Even for those who were nowhere near the bridge when it collapsed. Unlike other past disasters, the i35 bridge collapse spread awareness rapidly and informatively. The bridge was owned by the federal government, and was operated and maintained by the state of minnesota.
Suffering from a brain and spinal cord injury, paula has been on the road to. The past 10 years have garnered some positive changes in our nations bridges. When excess weight was placed on the bridge over one of those u10 nodes, that node failed within 3. L47 2010 this book addresses the i35 bridge collapse in detail. At that point, five people were confirmed dead and 8 others missing. Lessons learned from the 35w bridge collapse the current. On august 1, 2007 paula and her family were driving across the i35 bridge. The i35w mississippi river bridge officially known as bridge 9340 was an eightlane, steel truss arch bridge that carried interstate 35w across the saint anthony falls of the mississippi river in minneapolis, minnesota, united states. The fact that a bridge is deficient does not imply that it is likely to collapse or that it is unsafe. I35 bridge collapse thinkreliability, case studies. The i35w saint anthony falls bridge subject of the may 2008 pm cover story was open to traffic months after its predecessors collapse, three months ahead of. Despite the fact it was a design flaw and not deferred maintenance that led to the failure of i35, the collapse led to a concerted effort at all levels of government to improve bridge conditions in the u.
Cause mapping any incident requires first asking four questions. Mndot accelerated the delivery of the i35w mississippi river replacement bridge project using the designbuild procurement process. It means they must be monitored, inspected and maintained. The news of the collapse was not only spread through news reports, but through the world wide web. I35w bridge collapse applied science international, llc. Federal regulators said support plates that were about half as thick as they should have been were the likely cause of the august 1, 2007, bridge collapse in minnesota that killed people and. To mark the 10year anniversary of the i35w bridge collapse, city pages is reposting this story, originally published two weeks after the collapse. After 16 months of waiting, we have the final verdict. I35w bridge collapse bridge collapse investigation focus area october, 2007. New mn historical society exhibit a bridge piece commemorating the 10th anniversary will go. I attended an ncite breakfast meeting yesterday where jim kranig from mndot and don sobania from the city of minneapolis gave presentations on the traffic management response to the i35w bridge collapse.
Ntsb releases report on i35w bridge collapse roads. Aerial photography company took these pictures days after the mississippi bridge collapse in augist 2007 in downtown minneapolis. Remembering the i35w bridge collapse 10 years later. The entire truss was recovered from the river to study the causes of failure. Cdt on wednesday, august 1, 2007, during rush hour traffic, the central span of the i35 mississippi river bridge pictured to the. I35w bridge collapse bridge collapse investigation. The i35w bridge over the mississippi river in minneapolis, minnesota, collapsed suddenly on august 1, 2007. The replacement i35w bridge, ready nearly three months early, will open thursday morning, a massive array of state, local and federal officials announced today at a morning news conference at the. I35w bridge collapse survivor writes riveting memoir. Haos discussion of the design shortcomings and causes of the i35 bridge collapse should be commended for its thoroughness and candor.
The uniqueness of this bridge collapse, and the challenges faced by firefighters. The i35w bridge in minneapolis collapsed and bolander was contracted to remove the bridge components and piers to two feet below grade. Rybaks office said monday that no public event is planned for this aug. The minneapolis bridge collapse in 2007 was a real awakening when it comes to the state of our infrastructure. Minneapolis interstate 35w bridge collapse minnesota. My book e ottimizzato per il nuovo sistema operativo di microsoft windows 8, anchesso interamente riprogettato in chiave mobile. At the time, there were approximately 120 vehicles, carrying 160 people, on the bridge. Robles lora abstract the deck truss portion of the i35w highway bridge in minneapolis, minnesota collapsed on august 1, 2007 while roadwork was underway on the bridge. The minnesota bridge collapse, 5 years later st anthony. Problem the i35w bridge in minneapolis, minnesota was built in 1967. A disaster brought awareness but little action on infrastructure video the collapse of the i35w bridge in minneapolis in 2007 killed people and. What is the legacy of the 35w bridge collapse on minnesota.
A survivors account of americas crumbling infrastructure, details her experience healing from injuries sustained in the collapse, and her own. Findings cite design errors and excessive construction loads as factors. This article details a forensic engineering analysis that we conducted to determine the reason for the structural failure of the i35w bridge collapse. Structurally deficient means there are elements of the bridge that need to be monitored andor repaired. The i35w mississippi river bridge was built with a design flaw where a particular set of gusset plates in the u10 nodes were too thin. Analysis of the 2007 interstate35 bridge collapse in minneapolis, mn civil engineering and architecture isabel kosic 12414 at 6. I35w bridge khani sahebjam, pe vice president hdr engineering, inc. I35w bridge collapse traffic management lessons learned.
The collapse of the i35w bridge in minneapolis in 2007 killed people and focused attention on the state of bridges across the nation. People across the united states were quickly informed through websites such as. So what, if anything, is the legacy of the bridge collapse on minnesota politics and policy. This note briefly summarizes an analysis based on original design drawings, an investigation of material evidence provided by the national transportation safety board ntsb, and a fullscale load rating of the bridge superstructure. The photo below was taken about 3 weeks after the disaster. Failure in structural steels and overview of i35w bridge collapse jack przywara, university of notre dame advisor. The failure of any one of these gusset plates would start a chain reaction of failures that would. Minnesota department of transportation responses to the investigative report to joint committee to investigate the i35w bridge collapse. By definition, the law states that for every force exerted on an object, there is an equal and opposite reaction force. A new book examines the i35w bridge collapse, 11 years. The report cited that the probable cause was the inadequate load capacity.
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