Which oil pipeline in Alaska has some parts raised on stilts to prevent the permafrost from melting?

Trans Alaska pipeline

The Trans-Alaska Pipeline were built on an elevated support system that keeps the pipe about six feet above the ground.

Trans-Alaska Pipeline

Trans-Alaska Pipeline 

The pipeline is the Trans Alaskan pipeline. Although insulated and on stilts it has radiators at regular intervals along it, to maintain the warmth of the crude oil to keep it flowing. It is also on silts to allow migrating Caribou to travel North during summer months and also to allow the pipeline to move during earth tremors, as Alaska is in an area prone to earthquakes.