The recent settlement of a lawsuit alleging that coal trains are polluting waterways in Washington and Oregon secured $1 million for mitigation projects. BNSF has also agreed to pay for cleanup of spilled coal in five sites along the Columbia River Gorge. But the watchdog groups behind the suit say the court’s order for a study of the use of physical covers for coal and petroleum coke trains may have the most impact. Seven environmental groups, including the Sierra Club and Columbia River Keeper