TransCanada Corp. no longer expects a decision on the U.S. presidential permit required for the Keystone XL pipeline by the end of the year, the company said in a filing with the U.S. Securities and Exchange Commission.

The pipeline could carry up to 830,000 barrels per day of Canadian and U.S. oil to refineries along the U.S. Gulf Coast. It has hit several regulatory snags since it was first proposed in 2008.