A proposal for a new coal mine north of Glacier National Park is becoming the latest transborder dispute over Cascadia water.

Montana officials are worried that a new mine in British Columbia would pollute the headwaters of the Flathead River, which is key to the state’s recreation-based industry. B.C. would get the economic benefit of the mine.

Gov. Brian Schweitzer reportedly wants to publicize the potential environmental impacts in Vancouver and get Washington, D.C., involved. Sen. Max Baucus plans to ask the U.S. General Accountability Office to investigate whether B.C.’s government has been following its own environmental laws. He’s also looking into a lawsuit under NAFTA and threatened to take the issue to the mine operator’s investors in Germany and Japan. “There’s a lot of ways to skin a cat,” he told the Missoulian.