From: otterpower@xhotmail.com

On 5/15/2014 3:43 PM, Adam H. Kerman wrote:
> Sancho Panza   wrote:
>> On 5/15/2014 9:05 AM, Adam H. Kerman wrote:
>>> For those of you on Usenet so enamored of the safety record of pipelines
>>> for transportation of oil, you may not want to read about last night's
>>> disaster:
>>>
>>> A ruptured oil pipe near the suburb of Glendale has spilled about
>>> 10,000 gallons of crude oil onto streets; initial reports had the spill
>>> at 50,000 gallons. The leak from a 20 inch pipe was reported as 12:15
>>> am. Thursay, May 15, 2014. It was shut off remotely within 10 minutes of
>>> firemen arriving. Despite the shut off, the spill continued for at least
>>> 45 minutes.
>>>
>>> A strip club had to be evacuated.
>>>
>>> The pipe was under pressure; oil was seen shooting 20 feet into the sky.
>>>
>>> The oil came from Bakersfield. It's a pumping transfer station sending
>>> oil to a storage facility near Bakersfield.
>>>
>> Seeing as how no cause has yet been offered and the proximity of the
>> rupture to the San Andreas Fault, seismic activity is not out of the
>> question.
>
> Pipelines aren't planned to be compatible with know, significant seismic
> activity? That gives me every confidence about pipelines.
>

Earthquake Protection

With Alaska being one of the most seismologically active regions in the
world, TAPS engineers incorporated earthquake protection in the pipeline
design.

The seismic design of TAPS addresses two earthquake hazards: design
contingency earthquakes (DCE) and the design operating earthquakes
(DOE). DCE may interrupt operations but will not compromise the
integrity of pipe. DOE anticipates lower-intensity earthquake that have
ground motion amplitudes half those of a DCE. Operations should be able
to continue following a DCE.

Pipeline engineers designed TAPS to have greater flexibility and
movement at Alaska’s major fault lines. These allowances include:

     Denali Fault: 20 feet lateral, 5 feet vertical.
     McGinnis Glacier Fault: 8 feet lateral, 6 feet vertical.
     Donnelly Dome Fault: 3 feet lateral, 10 feet vertical.
     Minor Potential Faults: 2 feet lateral, 2 feet vertical.

On Nov. 3, 2002, the pipeline withstood a magnitude 7.9 earthquake that
was centered along the Denali Fault. The ground along the fault moved an
estimated 18 feet horizontally and nearly 2.5 feet vertically. The quake
was the largest on the Denali Fault since at least 1912 and among the
strongest earthquakes recorded in North America in the last 100 years.

Due to Alyeska’s earthquake protection, the Denali Fault earthquake did
not compromise the integrity of the pipeline. No oil spilled, and
pipeline operations resumed after minor repairs.
--http://www.alyeska-pipeline.com/TAPS/HistoryDesignConstruction
EarthquakeProtection



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