In the Field
Routine surveillance identifies needed valve stem repair
Trans Alaska Pipeline System workers repaired a minor check
valve stem leak after a routine maintenance inspection
revealed a problem near Pump Station 12.
The leak was stopped almost immediately and no oil reached the
environment.
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President's Message
David Wight, President and CEO
Concentrating on safety through change
Alyeska Pipeline
Service Company is entering a pivotal period as we begin our
pipeline reconfiguration project. This $250 million project
will be the single biggest investment in the Trans Alaska
Pipeline System (TAPS) since construction. It will also
fundamentally change the way we do business.
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Face to Face
Pam Chelgren-Koterba
Incident Management
Team Readiness Coordinator
Pam Chelgren-Koterba joined Alyeska and moved to Valdez in
1996 to coordinate oil spill training exercises and work as a
Ship Escort Response Vessel System (SERVS) crisis readiness
manager. She is a retired National Oceanic and Atmospheric
Administration (NOAA) commander with
23 years of service, including seven years of sea duty.
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Pipeline 101
Heat Pipes
More than half of the 800-mile-long Trans Alaska Pipeline
System is built on permafrost – ground that remains frozen
year-round. This permafrost must be kept frozen to maintain
pipeline stability. One technique is to use vertical "heat
pipes" inside pipeline supports. These pipes contain anhydrous
ammonia, which vaporizes at temperatures just below freezing,
rises and condenses at radiators above ground when the air
temperature is well below freezing.
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