TC Energy Corp. plans to begin pre-construction work on the Keystone XL oil pipeline next month, moving the long-delayed project forward even as opponents continue to fight it in court.

Heavy construction equipment will be moved to worker campsites and pipeline storage sites in Montana, South Dakota and Nebraska in February, the Calgary-based company said in a filing with the U.S. District Court in Montana on Tuesday. TC then plans to start building the part of the conduit that crosses the U.S.-Canada border in April.

The filing shows that TC Energy is pushing the $8 billion project forward despite continued opposition from environmental activists and some landowners. The pipeline is still tied up in a legal battle in Montana, and the company noted that it needs additional authorizations and permits to build the border-crossing segment.

The 1,200-mile (1,900-kilometer) pipeline would help carry 830,000 more barrels of crude a day from Alberta’s oil sands to U.S. Gulf Coast refineries, easing a pipeline shortage that has hurt Canada’s oil industry. Environmentalists have opposed the project, arguing that it would contribute to catastrophic climate change by allowing more oil production.

TC Energy rose 0.3% to C$68.96 in Toronto on Tuesday. The shares have advanced 28% in the past 12 months, compared with an 8.5% gain for the S&P/TSX energy index.

SOURCE