• Looking up at the Gateway Arch

    Jefferson

    National Expansion Memorial Missouri

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  • I-44 Ramp at Walnut St. to Close This Weekend

    The Missouri Department of Transportation will close the ramp from eastbound I-44 to Walnut this weekend. Crews will close the ramp (Exit 291B) into downtown at 9 a.m. Friday, July 25 so crews can remove the remainder of the old ramp from the Poplar St. More »

Arch Architecture

View of the rising Arch facing east, 1963
The architecture of the Arch is one of its most interesting aspects. Learn more about the materials and techniques used in the construction of the Arch in a detailed account by J.E.N. Jensen, Associate Director of the National Park Service. Equally fascinating is the story of the Arch's architect, Eero Saarinen as well as the mathematical equation used to create the catenary curve shape of the Arch.
 
 
Time lapse slide show of the construction of the Arch.
The image on this page is an animated image of the construction of the Gateway Arch between February 29, 1964 - October 28, 1965. There are nine images in this animation that show the Arch at different points during its construction.

Did You Know?

The Gateway Arch

The Gateway Arch at Jefferson National Expansion Memorial is 630 feet high and the span of the legs at ground level is 630 feet across. Click here to learn more about the Gateway Arch. More...