The Globe and Mail reports in its Thursday edition that Canadian producers of softwood lumber are bracing for a decision this week from the U.S. Department of Commerce that could mean a surge in anti-dumping duty rates, compounding the industry's worries over President Donald Trump's threats for sweeping tariffs on all imports from Canada. The Globe's Brent Jang writes that most Canadian producers are currently paying 7.66 per cent in anti-dumping duties levied by the United States, but that could jump to 20 per cent, trade experts say. The Commerce Department's decision, slated for today, will be preliminary, with a final anti-dumping rate determination in August. There are two types of punitive measures in the Canada-U.S. trade dispute. Anti-dumping duties are imposed because of what the Americans describe as Canadian producers selling softwood below market value; countervailing duties are based on what the U.S. sees as subsidized Canadian lumber. West Fraser Timber is currently paying an anti-dumping duty rate of 5.04 per cent. Canfor has an anti-dumping levy of 10.44 per cent. Canfor's specific anti-dumping duty rate is at risk of soaring to 35 per cent, while West Fraser's levy could climb to 9 per cent.