Yes. In fact, the Keystone Pipeline System consists of four phases; TransCanada received a presidential permit for the first phase in March 2008. It began operating in the US in 2010 and transports oil from Alberta to Illinois.
Since then, the second and third phases – which extend the original pipeline to Oklahoma, then the Gulf Coast, respectively – were constructed and are currently in operation. Keystone XL would be the fourth and final phase.