In 2008, a limestone cave in Valmeyer, Illinois-about 40 miles southeast of St. In addition to having sufficient space and conditions to store records, Subtropolis-which is dubbed the "World's Largest Underground Business Complex"-has several miles of illuminated, paved roads and railroad tracks houses a paintball and laser tag course and holds an annual 5k and 10k Groundhog Run. The Kansas City FRC is in "Subtropolis," another excavated mine.
In addition to Lee's Summit and Lenexa, a third cave in the region, in Kansas City itself, opened in 2012. With temperatures maintained at 25☏ and 35☏, staff have nicknamed the space the "Ice Cube." In addition to serving as a records center, Lenexa has two archival cold storage rooms. In 2003 the Archives opened an underground FRC facility in Lenexa, Kansas. Today, the National Archives has four underground facilities. And underground storage is also less expensive than above-ground storage, with plenty of room for expansion and enhanced security. Since then, the underground space has been retrofitted and adapted for commercial use.īecause the temperature is naturally around 60 to 70 degrees, there is significant savings in temperature and humidity control. Then in the 1950s, businesses started using the old mines for storage. The caves were largely abandoned after the area's building boom ended. Mining was a booming industry in the late 19th and early 20th centuries, and the result was millions of square feet of underground space.
The idea wasn't new to the Archives-in the 1950s and early 1960s, the General Services Administration, which included the National Archives at that time, stored vital records in a mine in Neosho, Missouri. It's 60 feet below ground in a man-made limestone mine. The National Archives' first underground FRC-Lee's Summit, outside Kansas City, Missouri-opened in 1997. Many of these are stored in man-made limestone caves in Missouri, Kansas, and Illinois. In addition to these permanent holdings, the National Archives cares for billions of temporary, inactive records stored in our Federal Records Centers (FRCs) across the nation.
The National Archives holds hundreds of miles of film and tape, some 14 million still photographs-and billions of pieces of paper. The National Personnel Records Center Annex in Valmeyer, Illinois, before shelves were installation.
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