Golden Gate, California, was the birthplace of Americana.
From the first American to fly across the water, the bridge is the oldest, and has stood for more than 2,000 years.
It’s been in the public domain since 1891.
And the bridge itself, which spans the San Andreas Fault, is under threat.
In an article for TIME, architect and urban planner Tim Leighton explains how the bridge was built, and what could happen next.
“The bridge was originally constructed in 1891 as a concrete structure, and was designed to be a permanent fixture on the Golden Gate,” Leighton writes.
“It is built of a combination of concrete and steel, and the main span is constructed of three sections: a cantilever, a canteen, and a water main.
The cantilevers are designed to move with the wind, which moves the cantilevered structure as it passes under the San Francisco Bay.
The main span has two cantileved sections, each about 6 feet long and 1.25 feet wide.”
The cantillaries were designed to withstand earthquakes and other impacts, and to be designed to stay in place under the strain of a powerful earthquake.
“For decades, the cantillary was the mainstay of the bridge, and it remained that way for almost two hundred years,” Leeson writes.
But after the 1906 earthquake, the span underwent major structural and environmental changes.
The San Francisco Examiner writes that the cantillation system of the cantiles were changed, so that the suspension of the span could be lowered to stabilize it.
The bridge, which was designed by the architects of the city of San Francisco, was designed as a permanent part of San Jose, California.
The structure was not designed to last long, however, as it was torn down in the 1930s and rebuilt by the San Jose State University.
“The structure has been demolished several times, including to make way for housing developments,” Leong writes.
In 2011, the Golden gate was listed as an historic landmark by the National Park Service.
“It is not only a landmark to its residents and visitors, but also to the local economy that relies on its business, recreation, and tourist revenue,” said a statement from the San Diego County Historical Society.
Leighton says that the current project, called Golden Gate Park, is a public-private partnership that aims to bring back the bridge and its historic significance to the people of San Diego.
In addition to restoring the bridge to its original design, the project includes building a new pedestrian bridge over the San Gabriel River, which would be the first bridge of its kind in California.
It will also restore and restore the bridge’s iconic clock tower.
“The clock tower has been in use since 1881 and has been used by people of all ages, sexes, and races for more that 50 years,” he writes.