240
When the time comes, they will unseal it.
(startrek.website)
For the curious ones,
It’s called the Artesian Well.
Located next to the bottling machines is the well that provided water in the early years of Dr Pepper bottling. An underground aquifer of artesian water was the source. The water from the well was pumped to the third floor to be filtered and distilled, then it came back down to the first floor through hoses. In the 1920s the well was filled with broken bottles and forgotten until the restoration of the building in the 1980s. They excavated to the depth of 27 and a half feet, which is what you can see today.
