THE MACKINAC BRIDGE that spans the Straits of Mackinac. Gov. Rick Snyder signed legislation Wednesday establishing a panel to oversee a tunnel that will house an oil pipeline beneath the waterway linking Lake Huron and Lake Michigan. (AP Photo/Carlos Osorio, File) TRAVERSE CITY, Mich. (AP) — Gov. Rick Snyder signed legislation Wednesday establishing a panel to oversee construction of an oil pipeline tunnel in the waterway linking Lakes Huron and Michigan, while opponents insisted the battle isn’t over and could widen from the state Capitol to the courts. Snyder also appointed the three members of the new Mackinac Straits Corridor Authority, furthering his push to ensure that oil will continue flowing through Enbridge Inc.’s Line 5 after he leaves office at the end of December. The Republican governor praised the lawmakers who rushed the bill to enactment following the election of Democratic Gov.-elect Gretchen Whitmer, a critic of Line 5 and the tunnel plan. “By working together, they helped garner bipartisan support to ensure we are protecting the Great Lakes while securing better energy infrastructure for Michigan,” Snyder said. Line 5 has carried crude oil and natural gas liquids used in propane 645 miles from Superior, Wisconsin, through northern […]