The Alaska pipeline has transported over 16 billion barrels of oil from Prudhoe Bay in the north to the port of Valdez since it was completed in 1977 . It crosses several mountain ranges and is 800 miles long.
The pipe is 4 ft. in diameter. The vertical structures alongside of the pipeline are designed to cool the line down from the 145 degree fahrenheit rise in temperature caused by the friction of the flowing oil. I'm keeping my hand warm by touching the pipe.