The vault is safeguarded by a comprehensive multilayered security system, highlighted by a 90-ton steel cylinder protecting the only entry into the vault. The nine-foot-tall cylinder is set within a 140-ton steel-and-concrete frame that, when closed, creates an airtight and watertight seal. Also, once closed, four steel rods are inserted into holes in the cylinder and time clocks are engaged, locking the vault until the next business day.

Security is further enhanced by the massive steel-reinforced concrete walls surrounding the vault and 24-hour monitoring of activity inside and outside the vault by security cameras, as well as the use of motion sensors when the vault is closed. Continuous supervision by the vault control group also ensures that proper security procedures are followed at all times. Additionally, the gold is protected by the New York Fed’s robust building security system and the armed Federal Reserve police force.