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Originally Posted by Relish XXX
Did people use to work in those tunnels every day years ago?
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I'd assume so, yeah.
Not the greatest working conditions, of course. One night during a visit we actually got fogged in. The air outside was cooler than the tunnel air, and we ended up with a heavy fog in the tunnels...the flashlights barely penetrated it...and we had to switch to using blue LED light to navigate around.