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Re: State bill to defund CHSRA
Author: TomL
Date: 03-17-2010 - 15:59

Tunnels thru the Tehachapis?
That is location for some of the largest earthquakes in California.

The Tehachapi earthquake of July 1952 on the White Wolf fault.
USGS 1952 Tehachapi EQ

Magnitude 7.6.
Ground movement of 30 cm at Arvin.
SP tunnels at Bealville (46 cm thick) were cracked.
Rails shifted approx. 5' in new S-turns.
Highway 466 (now Highway 58) suffered 30 cm of settling, while NE of the highway, the ground was displaced 60 cm vertically and 45 cm horizontally.
The maximum ground elevation change was 1.6 m (4 ft.)

Ft Tejon was the location for another earthquake, est magnitude 8.0, in 1857.
Kern County EQs
In that EQ, the San Andreas fault ruptured betw 220 and 250 miles, with an average vertical rupture of 4.5 m (15 ft) and a maximum vertical rupture of 9 m (30 ft) in the Carrizo Plain.

I doubt the state or feds could afford to build railroad tunnels strong enough to withstand an 8.0 earthquake in the Tehachapi area.

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Subject Written By Date/Time (PST)
  State bill to defund CHSRA synonymouse 03-17-2010 - 14:08
  Re: State bill to defund CHSRA file not found 03-17-2010 - 15:47
  Re: State bill to defund CHSRA Newrad 03-17-2010 - 16:00
  Re: State bill to defund CHSRA TomL 03-17-2010 - 15:59
  Re: State bill to defund CHSRA mook 03-17-2010 - 18:32
  Re: State bill to defund CHSRA Joe Thyle 03-18-2010 - 08:05
  Re: State bill to defund CHSRA Eugene 03-17-2010 - 16:02
  Re: State bill to defund CHSRA synonymouse 03-17-2010 - 18:57
  Re: State bill to defund CHSRA Carol L. Voss 03-17-2010 - 19:27
  Re: State bill to defund CHSRA Drew Jacksich 03-17-2010 - 20:02
  Re: State bill to defund CHSRA--cement boat Carol L. Voss 03-17-2010 - 20:44
  Re: State bill to defund CHSRA--cement boat RCZ115 03-17-2010 - 22:19
  Re: State bill to defund CHSRA--cement boat Joe Thyle 03-18-2010 - 08:12
  Re: State bill to defund CHSRA--cement boat Bill C 03-18-2010 - 12:03
  More about the "Palo Alto" and others OPRRMS 03-18-2010 - 12:20
  Re: State bill to defund CHSRA Morris Blood 03-18-2010 - 08:20
  Re: State bill to defund CHSRA synonymouse 03-18-2010 - 11:19
  Re: State bill to defund CHSRA T Judah 03-18-2010 - 19:32
  Re: State bill to defund CHSRA Michael Mahoney 03-18-2010 - 12:48
  Re: State bill to defund CHSRA synonymouse 03-18-2010 - 13:07


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