News Bulletin 1357
Pipeline Anchors Trip Near Check Valve 50
ANCHORAGE, AK January 7, 2002 On January 4th, ground surveillance being performed by Alyeska
personnel revealed that 7 anchors on the Vertical Support Members that
support the weight of the trans-Alaska Pipeline had moved, or
"tripped". These anchors, located on 7 VSM's in the Prospect
Creek area near Pump Station # 5, are being inspected and repair crews
are on scene. There is an anchor assembly on many of the VSM's on the
pipeline.
Repairs are beginning today and are expected to take 7 to 10 days
to complete. The cause of the movement is under investigation by the
Alyeska System Engineering Team. The system put in place to protect
the integrity of the pipeline performed as designed and remains in
good condition. That system consists of the anchors, the
"shoes" and sacrificial components, such as energy
absorbers. Pipeline surveillance was conducted between North Pole
Metering (just south of Fairbanks) and Pump Station # 5 and no other
problems were observed.
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