The Trans-Alaska Pipeline was built in the 1970s. How long is this great engineering feat?
The Trans-Alaska Pipeline System transports crude oil from the north slope of Alaska to Valdez, the northernmost ice-free port, 800 miles away. The pipe diameter is 48 inches. Because of permafrost, much of the pipeline could not be buried. To accommodate moose and other animals who might not be able to cross or might damage the Pipeline, it is six to eight feet above ground in some areas.
