This picture was shown the CRS-10 launch webcast:

LC-39A during SpaceX CRS-10 countdown (red frame added by me)

What is the marked tunnel-like opening with the white vertical bars? And what is/was its purpose?

The same structure can also seen in Google StreetView: LC-39A in 2012 This is dated Jan 2012, so this is apparently something from the Apollo or Shuttle era.


2 Answers 2


That is the "high pressure gas storage facility". Mostly used for N2. And yes, it dates from the Apollo era.

Reference (search the linked page for the word "exploded diagram")

Another Reference

  • 1
    $\begingroup$ Cool, thanks! I never realized that there would be such large facilities in there... $\endgroup$
    – oefe
    Commented Feb 19, 2017 at 19:01
  • $\begingroup$ The first linked reference talks about a lot of the inner facilities including the "rubber room". $\endgroup$ Commented Feb 19, 2017 at 19:07

Those are pressurized gas storage tanks.


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