nanog mailing list archives
Re: If you were in a government Cyber-warning center
From: David Lesher <wb8foz () nrk com>
Date: Sat, 27 Apr 2002 00:16:45 -0400 (EDT)
Unnamed Administration sources reported that Randy Neals said:
Most recent railway builds have been multi conduit projects with up to 12 x 1.5 inch HDPE conduits plowed in by rail mounted cable plow. Your correct that steel conduit is used at bridge crossing or other exposed locations.
I call the HDPE stuff "duct" and reserve "conduit" for material that passes the magnet test; YMMV. BTW, a 18" piece of HDPA is a useful tool in some neighborhoods.. even BEFORE it's filled with ballast.
Apparently by placing the conduit 3-4' down and relatively close to the rail (ie: 2-3' from the rail) the steel rail will act somewhat as a shield to minimize exposure of the cable in a derailment. (ie: the car has to rip up the trackage and move the dirt to get to the cable)
That's quite rational. But I'm still glad I don't have to dig that. There are pictures of ATT with a honking big digger wheel going across Kansas et. al. I keep saying to myself "This is a BIG country and there are LOTS of rocks down there..." The pole crew in front of my house "Seaned" on the 5" water main. To get to it, they pulled out most of a glacial boulder the size of a Ford Van and carted it away. -- A host is a host from coast to coast.................wb8foz () nrk com & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433
Current thread:
- RE: If you were in a government Cyber-warning center Randy Neals (Apr 26)
- Re: If you were in a government Cyber-warning center David Lesher (Apr 26)
- <Possible follow-ups>
- Re: If you were in a government Cyber-warning center Ukyo Kuonji (Apr 27)