This pipline runs for 800 miles. That's like going from NYC to South Carolina. When you see the terrain this thing crosses it's just unimaginable to think it was completed in just 3 years. The metal fins on top of each post dissipate the heat of the 140 degree oil so that the heat doesnt tranfer to the post, which is essentially resting on perma frost (frozen ground), and cause the post to melt the frost and sink.