Shelagh Hansom.

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Presentation transcript:

Shelagh Hansom

The Trans-Alaskan Oil Pipeline Developing the Tundra

The Route of the Trans Alaskan Pipeline 1300 km

Route of pipeline under construction Gravel bed being laid

Pipeline construction

Pipeline is buried on a layer of well drained sandy gravel,covered with gravel padding & filled with soil

Aerial view of the pipeline Highway

Zig zag pattern to allow for expansion & contraction Gravel beds to prevent subsidence during summer thawing of thin top layer underpass

GATE VALVE – 86 remote & 9 manual

Change from pipeline on stilts to being buried underground

The pipeline in winter

The Dalton Highway Rocky Mountains pipeline

Pipeline bridges – 600 streams & rivers to cross!!

Yukon River bridge Pipeline & vehicles

DENALI FAULT CROSSING

VALDEZ – rebuilt on solid rock for earthquake protection

Oil tanker leaving Valdez in Southern Alaska Ice free all year

Escort ship Tanker

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