U.S. Bureau of Land Management April 7 announced a nine-month extension of the scoping period for the Ambler Road project, a proposed 211-mile road that would run west from the Dalton Highway along the southern foothills of the Brooks Range to the Ambler Mining District.

In February, BLM announced a 90-day scoping period for the project that was slated to expire on May 31. That expiration has...