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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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Downstream 10th Avenue Bridge. Heard on All Things Considered. The collapse of the bridge affected river, rail, road, bicycle and pedestrian, and air transit. Educate on the Importance of Gusset Plates Gusset plates were not considered as part of collaps load rating. Retrieved August 23, Ray LaHood, who served as transportation secretary under President Obama.

IW Mississippi River bridge – Wikipedia

The three main spans were of deck truss construction while all but two of the eleven approach spans were steel multi-girder construction, the two exceptions being concrete slab construction. Archived nridge the original PDF on March 25, Make Preliminary Designs Clearly The designs for the bridge were meant to be preliminary.

Menu House Minnesota House of Representatives. Archived from the original on January 6, This chronology outlines some of the significant events regarding the IW Bridge collapse and the efforts to build a new bridge:.

Root Cause Analysis of the I-35 Bridge Collapse

Emergency Declarations Executive Order declaring a peacetime emergency Gov. Archived from the original on March 10, ; Mador, Jessica August 2, 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. Archived from the original on March 20, It was constructed on vollapse accelerated schedule, because of the highway’s function as a vital link for carrying commuters and bridte freight.


Even at this point, we can Cause Map useful, solution-focused steps to determine how the error went unnoticed in the load rating calculations.

Archived from the original on October 22, Retrieved August 29, Rybak were present, and both spoke at the reveal. 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. Add Specific Training on Gusset Plate Inspections The process of designing, building and inspecting the bridge had plenty of assumptions.

The solution was to increase the concrete overlay to protect the rebar. Consultants report prepared by Wiss, Janney, Elstner Associates. Had this concentration not occurred, the collapse may have been prevented.

H37 Highway Spending: Here are just a few of those solutions. The End of the Road: The first is that the bowing displacement of the gusset plates went unmentioned. When a Bridge FallsRetro Report [21].

The detail in a given map should be worked collapsw a point where risk can be reduced to an acceptable level. Cameras and motion detectors were added to the site around the bridge to ward off intruders who, officials said, were hindering the investigation. About 35 of them were determined to need only routine, preventative maintenance. Archived from the original on July 9, The bridge also had brodge past assessments from US regulatory agencies, raising questions surrounding state upkeep and maintenance procedures.


But while Minnesota has acted aggressively to reduce it’s number of structurally deficient bridges, what about the rest of the country? Inthey rated the bridge at 50, indicating that replacement may have been in order. This guide is compiled by staff at the Minnesota Legislative Reference Library on a topic of interest to state legislators.

Archived from the original on October 17, Investigation into Collapse of I Bridge” Press release. The first bridge upstream is the historic Stone Arch Bridgebuilt for the Great Northern Railway and now used for bicycle and pedestrian traffic. Department of Transportation’s National Bridge Inventory database.

Approximately 75, other U. The installation was paired with a cycle of 35 poems: Rybak’s declaration was approved and extended indefinitely by the Minneapolis City Council the next day. 3940 media made more inquiries for National Bridge Inventory data in the first 24 hours after collapsee Minneapolis bridge collapse than for any previous data in the past 20 years.

This image shows a fracture in a gusset plate that played a key role in the collapse of the Interstate 35W bridge. Archived from the original on September 27, Sequential images of the collapse were taken by an outdoor security camera located at the parking lot entrance of the bgidge facility for the Lower Saint Anthony Falls Lock and Dam.

This article is about Bridgethe btidge that collapsed in