 Meanwhile, Enbridge Energy has urged Minnesota regulators to stand by their decision to approve its proposal for replacing its aging line 3 crude oil pipeline across northern Minnesota. The Calgary-Alberta-based company set in a filing Monday that the Public Utilities Commission should deny petitions for reconsideration filed earlier by environmental and tribal groups and the state commerce department. Enbridge says the commission's approval complies and is supported by the record. Several commissioners cited line 3's deteriorating condition when they approved the replacement this summer. Tribal and environmental opponents say the project threatens pristine areas and vow mass protests to block it. The Public Utilities Commission doesn't usually grant petitions for reconsideration, but they are a necessary step in the process before opponents can appeal to the Minnesota Court of Appeals. If you enjoyed this segment of Lakeland News, please consider making a tax-deductible contribution to Lakeland PBS.