What was the cause of the Minneapolis bridge collapse?

What was the cause of the Minneapolis bridge collapse?

The National Transportation Safety Board ultimately determined that the probable cause of the collapse of the I-35W bridge “was the inadequate load capacity, due to a design error . . . of the gusset plates at the U10 nodes, which failed under a combination of (1) substantial increases in the weight of the bridge.

How many people died on the Minneapolis bridge collapse?

Thirteen people died
Ten years ago today, the unthinkable happened in Minneapolis when an interstate bridge collapsed just at the end of rush hour. Thirteen people died, and many more were injured. Minnesota Public Radio’s Solvejg Wastvedt talked with survivors and witnesses who still hold on to vivid memories of that disaster.

How did the government respond to Minnesota bridge collapse?

Three days after the bridge collapse, Congress authorized about $250 million to rebuild the bridge, and the Minnesota Department of Transportation issued a request for qualifications for the contract.

Who died in i35 bridge collapse?

Patrick Holmes, 36, of Mounds View, was found dead at the scene of the bridge collapse that same night. His wife, Jennifer, heard the news a little after midnight. The autopsy shows Holmes died instantly from his injuries after falling onto the collapsed portion of 35W.

Who was responsible for the Minneapolis bridge collapse?

And the National Transportation Safety Board determined that it was a design flaw, and not deferred maintenance, neglect, or other problems, that caused the 35W bridge to collapse. Gusset plates that hold the bridge’s huge steel beams together were only half as thick as they should have been.

How many bridges collapse a year?

Based on the data extrapolation and 95% confidence interval, the estimated average annual bridge collapse rate in the United States is between 87 and 222 with an expected value of 128. The database showed hazards that have caused bridges to collapse historically, throughout the United States.

How likely is it for a bridge to collapse?

The geometric distribution was determined to be a valid model for the number of bridge failures per annum through multiple methods. Based on the data extrapolation and 95% confidence interval, the estimated average annual bridge collapse rate in the United States is between 87 and 222 with an expected value of 128.

What was the cause of the bridge collapse in MN?

Within twenty-four hours of the bridge collapse, investigators from the National Transportation Safety Board (NTSB) arrived on the scene to figure out the root cause of the tragedy. Investigators looked at the weather, traffic patterns, and even the type of solvent used to melt ice that built up in wintertime.

When did the I 35W bridge collapse in MN?

MNopedia, Minnesota Historical Society. http://www.mnopedia.org/event/i-35w-bridge-collapse (accessed September 8, 2021). View of the collapsed I-35W bridge (Bridge 9340) on August 1, 2007. Photograph by Heather Munro. The I-35W (Interstate 35 West) bridge over the Mississippi River in Minneapolis opened to traffic in 1967.

Is there a bridge over the Mississippi River in Minnesota?

For the replacement bridge, see I-35W Saint Anthony Falls Bridge. The I-35W Mississippi River bridge (officially known as Bridge 9340) was an eight-lane, steel truss arch bridge that carried Interstate 35W across the Saint Anthony Falls of the Mississippi River in Minneapolis, Minnesota, United States.

Where is the memorial for the 35W bridge collapse?

The 35W Bridge Remembrance Garden is a memorial commemorating the victims and survivors of the I-35W bridge collapse. The memorial is located off West River Parkway, in Minneapolis. The memorial was revealed to the public on August 1, 2011, the four-year anniversary of the collapse.