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Engineering Marvel: The Gateway Arch

Jeremiah Thomas, PE - ECP Engineering & Training

Jeremiah Thomas, PE  (a.k.a. Bullfrog)  is part of the Engineering & Training Team at ECP.  He will be sharing engineering topics on our blog so check back frequently for updates from Jeremiah.

The Gateway Arch: St. Louis, Missouri

At more than twice the height of the Statue of Liberty, the 630-foot tall Gateway Arch in St. Louis is the tallest monument in America. The Arch was built to commemorate Thomas Jefferson’s commitment to westward expansion.

To support the large structure, the base is supported by 60-foot deep foundations which includes at least 20-feet embedded into bedrock. After the foundations were poured, construction on the Gateway Arch started at the base of each leg. To make sure the legs met in the middle, surveying was done throughout construction. Tolerance at the top was extremely precise and could not be off by more than 1/64th of an inch.


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