A Montana federal judge has invalidated a key permit for the Keystone XL pipeline.
In an order handed down Wednesday, April 15, Judge Brian Morris says a permit issued by the U.S. Army Corps of Engineers bypassed necessary environmental reviews.
The order says TC Energy, formerly TransCanada, cannot build across waterways along the pipeline route until the Corps does more work on the permit.
SDPB's Victoria Wicks has this report.