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Thread: OPERATION ORPHEUS test tunnel, callington

  1. #1
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    Default OPERATION ORPHEUS test tunnel, callington


    Visited by myself last year (no access) then by MrB and lycos (see theyre report - "Excelsior tunnel")

    I visited in April and once again more recently....



    Kit Hill/Excelsior tunnel was built to drain kit hill mine in the 1880's but never finished. A huge amount of water still drains through it however...

    In the mid 50's with the cold war at its height, talks to stop nuclear testing started in 58' Dr Latter from the US concluded that is was possible to hide underground explosions with a theory of decoupling between two blasts close together,

    the 6x6 test chambers were quickly constructed in the tunnel and testing began.. they may well be the first of its kind worldwide....Enjoy!




















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    Last edited by kernowexpeditionary; 7th Sep 08 at 12:20. Reason: finger trouble
    Kernow Expeditionary Force

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  2. #2
    BigLoada Guest

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    This is brilliant, kit hil was quite an important area in its day for tin and arsenic and other stuff. Underground explosions sounds a bit dodgy though, wouldn't have fancied being involved in that!
    Very nice work on lighting the pictures too.

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  3. #3
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    thanks m8 i think this is a great site! maybe others dont get it!
    Kernow Expeditionary Force

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  4. #4
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    Default Excellsior Tunel


    Nice pics, the "Latter de-coupling theory" write up is well worth a read.

    I seem to remember there were two fatalities during construction due to bad air or explosive gas residue.

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  5. #5
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    Arsenic?!? I hope you washed yor hands afterwards!?!

    Can't beleive how colourful it is down there, you've got some nice shots there

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    Quote Originally Posted by Engineer View Post
    Nice pics, the "Latter de-coupling theory" write up is well worth a read.

    I seem to remember there were two fatalities during construction due to bad air or explosive gas residue.

    No radiation hazards there?

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  7. #7
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    Default Kit Hill Tunel


    Quote Originally Posted by Pegasus2 View Post
    No radiation hazards there?
    Only conventional explosives used for the tests, have a look at this.


    http://www.subbrit.org.uk/rsg/featur...eus/index.html

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