Tunnel Below Miss. River Among Keystone's Biggest Challenges
by Dennis Grubaugh, The Telegraph, Alton, Ill.
Knight Ridder/Tribune Business News
August 11, 2009
It's the ultimate in drilling challenges -- a tunnel 50 feet under the Mississippi River bottom, traversing a distance of 3,705 feet.
For those boring the way for the new TransCanada Keystone Oil Pipeline it's just part of the job and not even the biggest challenge in this region. That honor lies on the northern end of Illinois' Carlyle Lake, where the pipeline will span a distance of 4,500 feet.