Alaska Pipeline: Thompson Pass
Video duration: 2:53
One of the biggest challenges during the construction of the Alaska Pipeline was when workers reached Thompson Pass. There, welders and laborers had to scale a near-vertical 2800-foot mountain wall to install pipe. The solution was to develop a tower and cable system that would fly the 80-foot pipe sections into place. On December 6, 1976, the last piece of pipe was laid at Thompson Pass.