The U.S. Army Corps of Engineers may decide by week’s end whether to approve construction of the Dakota Access Pipeline across North Dakota’s Lake Oahe and lands claimed sacred by Sioux Indian tribes.

Justice Department lawyer Matthew Marinelli outlined the planned timeline for the Corps’ decision to a federal judge in Washington hearing a three-way dispute over the planned path of the Energy Transfer Partners LP-led project. Marinelli didn’t say which way the decision might go.

The case is Standing Rock Sioux Tribe v. U.S. Army Corps of Engineers, 16-cv-01534, U.S. District Court, District of Columbia (Washington).