BISMARCK, N.D. — Federal officials on Friday released a draft environmental review of the Dakota Access oil pipeline, but said they’re waiting for more input before deciding the future of the line’s controversial river crossing in North Dakota.

The draft was released more than three years after a federal judge ordered the environmental review and revoked the permit for the Missouri River crossing, upstream of the Standing Rock Sioux Tribe’s reservation. The tribe is concerned a pipeline oil spill could contaminate its water supply.

North Dakota officials support a decision that ultimately allows the pipeline to continue operating as it has. The tribe is calling for a new review and a pipeline shutdown.

The environmental review is key for whether the federal government reissues the permit. The pipeline has been operating since 2017, including during the environmental review.

The draft environmental impact statement, which is dated in June but was made public Friday, noted that the Army Corps of Engineers “has not selected a preferred alternative,” but will make a decision in its final review, after considering input from the public and other agencies.

The draft details five options, including denying the easement for the crossing and removing or abandoning a 7,500-foot segment. Officials could also approve the easement with measures for “increased operational safety,” or grant the same easement with no changes.

A fifth option is a 111-mile reroute of the pipeline to north of Bismarck, over 38 miles upstream from the current crossing. The reroute would require new permits from federal, state and local authorities and regulators, which could take at least two years. The exact path of such a reroute is unknown, according to the draft.

“We are seeking public input on the environmental analysis of each alternative, and that input combined with the environmental analysis will help us to make an informed decision among the alternatives,” Corps Omaha District spokesman Steve Wolf told The Associated Press.

A comment period will end Nov. 13. Public meetings are scheduled Nov. 1-2 in Bismarck.

A final environmental impact statement will follow the public input and environmental analysis, and a formal decision will be made, Wolf said.

Republican U.S. Sen. John Hoeven of North Dakota told the AP a final alternative is expected to come out in fall 2024.

He said he hopes for a decision that allows the pipeline to continue operating.