So what does everyone know about these Kansas subterranean vaults where films were/are stored? http://savestarwars.com/filmpreservation.html & http://www.shavenwookie.com/orhp/se/#RESTORE mention them, but the descriptions are vague and brief.
Guessing but this Stanley H. Durwood Film Vault in the Central Library must be close to the storage facilities. Why convert a bank vault into a movie theater!
http://www.flickr.com/photos/kclibrary/2649496689/in/set-72157606830379141/
Seems there is an episode of the History Channel's Modern Marvels which goes into the film vaults.
http://www.undergroundvaults.com/index.php/news/history-channel-to-film-underground/
Here seems to be the transcript of the 'Modern Marvels' 'Library of Congress' episode:
Modern Marvels - The Real National Treasure
HISTP
Aired on Saturday, Jun 19, 2010 (6/19/2010) at 10:00 AM
http://www.livedash.com/transcript/modern_marvels-%28the_real_national_treasure%29/5916/HISTP/Saturday_June_19_2010/236940/
00:35:31 75 miles from Capitol Hill in Culpeper, Virginia, the Library of Congress' newly completed Packard Campus for Audio-Visual Conservation sits half above ground and half below.
00:35:46 Built partially within a former bomb shelter, the building was designed to protect its contents from any catastrophic event.
00:35:55 And those contents happen to include the most valuable motion picture artifacts in the world, including 140,000 reels of original nitrate camera negatives and prints from America's first 60 years of moviemaking.,, >> LUKOW: We're standing in the Library of Congress' nitrate film vaults.
00:36:18 50 of those vaults right behind me here, another 74 on the other side of those doors at the end of the hallway.
00:36:25 124 vaults altogether.
00:36:28 Up until about 1951, all theatrical motion pictures that were shown in this country, week in and week out that your parents or your grandparents went to, were actually shot on nitrate film stock.
00:36:40 We have the original camera negative of Jimmy Stewart in Mr. Smith Goes to Washington and all the Frank Capra films.
00:36:46 And when I say "original camera negative," that means the film that was in the carara when Frank Capra had Jimmy Stewart standing right in front of it.
00:36:56 So that's, that's typical of what we have here.
00:36:59 >> NARRATOR: Nitrate film stock is highly flammable.
00:37:02 If a reel starts burning, not even immersing it in water will extinguish the flames because when nitrate burns, it creates its own oxygen.
00:37:12 No expense was spared in making the nitrate vaults fireproof.,, Should a nitrate fire ever start in a film canister, it would be contained to one fireproof shelf.
00:37:27 Sprinklers angled from above would cascade water in front of the shelves to prevent the fire,, from spreading outward.
00:37:36 The Packard Campus is the new home of the most precious film negatives and elements donated to the library by most of Hollywood's major studios.
00:37:48 Because the vault areas are kept at a constant temperature of 39 degrees Fahrenheit and humidity of 30%, even in the warmest months film specialists are dressed for winter.
00:38:00 There are no complaints, considering their everyday access to moviemaking's,, greatest treasures-- some famous and some relatively unknown.
And here's a passage about the preservation and return to the public domain of some works:
00:43:34 4 41hs) - The Real ,,,, >> NARRATOR: We now return to,, "The Library of Congress" onModern Marvels.
00:44:55 In every department of the,, Library of Congress, specialists are scanning the library's greatest treasures to make them available online.
00:45:04 Many of the newer items are older analog videotapes which need to be duplicated into digital formats.
00:45:13 >> JAMES SNYDER: We're doing one particular period in the history of CBS News, their archive, which is 1974 to 1985.
00:45:20 And just in that 11 years, we're talking 800,000 cassettes of one type: the three-quarter- inch cassette type.,, >> NARRATOR: The biggest challenge of being able to make digital copies of videotapes is to have working machines to play them all back.
00:45:38 For that reason, Culpeper has become one of the largest collectors of working video and audio machines in the world.,,,, When the appreciation of art forms is machine-dependent, it's critical to make sure at least one appropriate machine is able to make a transfer to new digital formats.
00:45:59 Packard engineers scour used equipment houses and even garage sales for spare parts to keep outdated machines working.