Talk:Cascade Tunnel
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[edit] Gradients
What is the gradient of the second Cascade tunnel, and which end (E or W) is higher in elevation?
Tabletop 07:54, 7 October 2005 (UTC)
The gradient in the tunnel is 1.7% and the higher elevation is at the eastern end.
[edit] Switchbacks
It looks like the old tunnel didn't avoid all switchbacks, and that there was one at Scenic and one north of Deception Falls. Is this correct? --SPUI (talk) 20:13, 24 November 2005 (UTC)
- Never mind - I found a map that shows a sharp hairpin curve at each end. The one north of Deception Falls was in a tunnel. --SPUI (talk) 23:26, 24 November 2005 (UTC)
[edit] "longest tunnel" claim
the article states "It is the longest tunnel in the United States." i think it was the longest tunnel when originally constructed, but is it still? there are longer tunnels that are not rail tunnels - there's a 100+ mile tunnel providing water to NYC, for instance, but i'm not sure if there are longer rail tunnels or road tunnels in the US. —The preceding unsigned comment was added by 66.92.68.224 (talk • contribs) .
I believe the intention was that it is the longest railroad tunnel in the United States. I fixed the article to state longest railroad tunnel.
[edit] Ventilation system (under History)
Can someone familiar with the subject clarify the ventilation system? At present, it refers to trains entering the EASTERN portal, which means trains going downhill. Why would they need any ventilation at all? And why does closing doors and turning on fans at the same time help? - I would have thought closing doors would defeat the purpose of the fans. --Ian Page 23:06, 19 July 2006 (UTC)
