Gateway Arch - Maintenance

Maintenance

The first act of vandalism was committed in June 1968; the vandals etched their names on various parts of the arch. The 1968 expenditure for repairing damage from vandalism was $10,000. The arch was first targeted by graffiti artists on March 5, 1969, but the vandalism was easily removed. In 2010, signs of corrosion were reported at the upper regions of the stainless steel surface. Carbon steel in the north leg has been rusting, possibly a result of water accumulation, a side effect of leaky welds in an environment that often causes rain inside. Maintenance workers currently use mops and a temporary setup of water containers to mitigate the problem. According to NPS documents, the corrosion and rust pose no safety concerns.

In 2006, architectural specialists studied the corrosion on the arch and suggested additional examination. A 2010 Historic Structure Report was conducted and found that the corrosion required a more comprehensive study. In September 2010, the NPS granted Wiss, Janney, Elstner Associates, Inc. a contract for a structural study that would "gather data about the condition of the Arch to enable experts to develop and implement the right long-term solutions."

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