Opponents of Enbridge Energy’s Line 3 pipeline project are hoping President Biden shuts that work down, too. Biden’s decision to stop work on the Keystone X-L pipeline has bolstered the hopes for other groups trying to stop similar pipeline projects. Opponents of Line 3 demonstrated Saturday near the Enbridge Energy headquarters in Superior. The marchers carried signs and said the Line 3 pipeline endangers the environment and is a threat to pollute the water supply. Enbridge says replacing the aging pipeline with new pipe made of thicker steel with technologically advanced coatings will actually be safer for the environment and the water supply.