U.S. lumber mills have gained some ground in a long-running trade dispute. Since November 2016, the U.S. International Trade Commission and the Department of Commerce have been investigating allegations that Canada’s government unfairly subsidizes its lumber industry, and that many of those mills dump underpriced lumber on the U.S. market. …But reactions are more muted in the Flathead Valley, where tariffs and investigations like these have vexed lumber producers and consumers for years. Neither they nor their Canadian counterparts see last week’s ruling as the end of the fight. …Chuck Roady, manager at F.H. Stoltze Land and Lumber in Columbia Falls, ranks imports as Stoltze’s third-biggest challenge, behind timber supply and federal forest policy. The Commission’s full report will become available later this month. But already, Roady feels vindicated.