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RE: Update: CSX train derailment
- From: Dave Stewart
- Date: Sat Jul 21 13:09:57 2001
At 12:50 PM 7/21/2001, up@3.am wrote:
Yes, I can see that; but I imagine you could handle this much the way
fiber is handled near the shoreline. Bury it a few feet under the mud or
sand.
Keep in mind, too, that every crossing isn't going to be a nice, deep
river... I can think of hundreds of cases (and so can you) where the
crossing is over a shallow creek or fairly deep ravine (no water at all!) -
yet difficult at best to trench it in... so cables, pipelines, etc, ride
the bridge...
Then your friendly local tropical storm comes along, drops plenty of water,
and the bridge washes out. Now what? Reroute everything, of course. Or a
tank truck catches fire and destroys the bridge (as happened in Atlanta not
long ago - sure, it was I-285, and I don't think any cables rode that bridge),
Obviously when routing cables, you have to deal with the cost/benefit
ratio. What are the chances of any single point suffering catastrophic
failure? How much will it cost to trench it in instead of riding a
bridge/tunnel? You make a decision, then you deal with the consequences if
you're wrong.
More than worry about exactly what method is used for routing cables, I
agree with building redundancy. Because no matter how you armor/protect
your cables, something CAN occur that'll break through that protection...
but if you have a backup in place, routed another way, with automatic
failover, you barely notice. More importantly, your customers DON'T notice.
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