Cables Fail on Bridge in Dallas After City Officials Ignored Santiago Calatrava’s Requests for Proper Testing

The office of Santiago Calatrava, known for their incredible feats of architecture and engineering, has come under scrutiny for the cable failures of their Margaret McDermott Bridge in Dallas, Texas, which has been delayed in opening due to a series of cable failures that have occurred since 2016. However, while the office has taken heat for the malfunction, as the Dallas Observer reported, a newly released set of documents show that Calatrava’s team tried to insist on testing the strength of the cables, even going so far as offering to loan money for these tests, but these offers were declined by the city.

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The first cable failed after a rod used to adjust one of the cables cracked on March 22, 2016. In the weeks following, two more rods cracked. A temporary fix of installing dampers onto the cables was attempted, but the pedestrian and cycle lane part of the bridge—the part actually held by the cables—has remained closed until a more long-term solution is found.

© <a href=''>Flickr user daxis</a> licensed under <a href=''>CC BY-ND 2.0</a>

© <a href=''>Flickr user daxis</a> licensed under <a href=''>CC BY-ND 2.0</a>

The $115 million dollar bridge is designed with two suspension arches that Calatrava designed, which are attached to the sides of a concrete pier-and-beam expressway bridge, to give the appearance of a suspension bridge. 

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Investigations by Dallas City Council member Scott Griggs revealed a series of documents that show Calatrava’s office repeatedly urged the city to properly test the cables, even offering to lend the city money for the tests if the issue was the cost. The documents further revealed that in September of 2016, Huitt-Zollars, the supervising engineering firm for the bridge, informed the Texas Department of Transportation that the City of Dallas and the contractor agreed to skip a cable stress test as a part of their value engineering options. Had these tests been done, these failures could have been predicted.

News via Dallas Observer.