The Wisconsin Public Service Commission won't weigh in on whether a $700 million natural-gas plant proposed for Superior will contribute to climate change despite objections made by various environmental groups.

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Enbridge Energy's plan to replace an aging crude-oil pipeline that runs through northern Minnesota hit another obstacle Tuesday when two state agencies said they would hold up the approval of the project's permits until flaws in its environmental review are eliminated.

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Enbridge Inc. said Monday that it is moving ahead with the collection of rock and soil samples in the Straits of Mackinac while it prepares for a court battle with Michigan's governor over a planned oil-pipeline tunnel there.

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Wisconsin and Minnesota have agreed to ban overweight vehicles from driving on the Blatnik Bridge, which connects Duluth to Superior, to forestall damage until the span is replaced in a decade's time.

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The U.S. Chemical Safety Board wants federal environmental regulators to re-examine a 1993 study on hydrofluoric acid following an explosion at an oil refinery in Superior last year.

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Husky Energy said Wednesday that it will spend more than $400 million to rebuild its oil refinery in Superior and will continue its use of a highly toxic chemical that raised fears in the community after an explosion at the refinery last April.

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The city of Superior has agreed to join a roughly $18.5 million project to remove contaminated sediments from Howards Bay to improve shipping and restore fish and wildlife habitat.

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Dairyland Power Cooperative has filed an application seeking permission from Wisconsin regulators to build a $700 million natural gas plant in Superior, a project that just barely won regulatory approval in Minnesota last fall.

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Clean-energy advocates will get a second chance to block the proposed construction of a natural-gas plant in northern Wisconsin, although the odds of prevailing are not in their favor.

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Opponents of Enbridge Energy's proposed replacement of its Line 3 crude-oil pipeline may turn their attention to fighting the project on other fronts as a Minnesota regulatory panel prepares to take one of its final steps to allow it to proceed.

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