Canadian Pacific and the Challenges of Crossing the Canadian Rockies: CP’s mainline through the Canadian Rockies has been its greatest operational challenge. Over the years, CP has invested in infrastructure and line relocations to mitigate these operational challenges. Recently, CP has started a new Multi-Year Plan to rebuild the tunnel systems over Rogers Pass as the most recent example of this. This work will not only prolong the life of these systems, but will introduce technology not known at the time of construction. These new systems will enable CP to greatly reduce maintenance cost while improving reliability.