Looks like a pipline to me. In Northern Canada they are running all over and when it snows the trees and brush cover up the snow but the pipelines are always exposed giving your the long white line effect. Most times the lines are buried but you still have to clear a path to drop them in the ground. Then after they are in, the wonderful oil companies pay pilots to fly up and down them to make sure there arent any leaks or spills. Great way to build time; 200' over the deck for hours straight. And yes every once in awhile there are blow outs. Hope this helps...................
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