ConocoPhillips’ proposed Willow project in Alaska’s National Petroleum Reserve may be back on track after the US Bureau of Land Management (BLM) released a supplemental environmental impact statement.

The future of the project was placed in doubt in August when a federal judge in Alaska voided ConocoPhillips’ permits.

The company, which discovered Willow in 2017, said it believed between 400 million and 750 million barrels of oil equivalent were in the play, and that the project could produce as much as 100,000 barrels per day of oil.