VIDEO: Workers clean top of St. Louis arch

ST. LOUIS, Mo. (WKRN) – Have you ever wondered who cleans the Gateway Arch in St. Louis?

Brave workers from the U.S. National Park Service released this insane video of crews scaling and cleaning the arch.

The team also collected sampled of some discoloration for a corrosion study while they were working.

The Arch is the nation’s tallest monument, standing at nearly 630 feet above the city of St. Louis.

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