The Vancouver Sun reports in its Saturday edition that Minnesota officials need to do more work on the environmental review of Enbridge's proposed replacement for its aging Line 3 crude oil pipeline, which has drawn strong opposition from environmental and tribal groups. An Associated Press dispatch to The Sun says that the Public Utilities Commission voted 4-1 Thursday to declare that the environmental impact statement is "inadequate" and sent it back for revisions to the Minnesota Department of Commerce, which conducted the review. The PUC is not scheduled to decide the bigger question of whether the project is needed until late April at the earliest. The PUC told the agency to revise three small parts of the EIS within 60 days, partly to include more information on how one particular alternative route could be altered to avoid environmentally sensitive geologic formations. The PUC's other questions also involved alternative routes. Line 3 carries Canadian crude oil to Enbridge's terminal in Superior, Wis. It starts in Alberta and clips a corner of North Dakota before crossing Minnesota. Enbridge wants to follow the existing route to Clearbrook, Minn., then take a more southerly route to Superior.