The Keystone XL pipeline would be TransCanada’s second pipeline for carrying highly polluting tar sands crude from Alberta, Canada through the U.S. The Keystone XL would enter the U.S. at Port Morgan, Montana. After passing through Montana, the pipeline would travel through South Dakota, Nebraska, Kansas, Oklahoma, and Texas, on its way to Gulf Coast oil refineries.
The pipeline would consist of a 36-inch buried pipeline transporting enough highly polluting tar sands oil to fill the Exxon Valdez every day and a half.
The proposed project’s original total length is approximately 1,980 miles through Canada and the U.S. As the proposed route changes due to landowner negotiations and other factors, that length will almost certainly change.
Google map of Keystone XL route through South Dakota (current as of early May 2009 — route may have changed somewhat since then)
Keystone XL Route maps (Link goes to the TransCanada website. Once you’re there, scroll down to Maps section.)