A world-renowned Alberta ski resort faces some legal moguls in a Calgary courtroom Monday over charges it cut down a stand of endangered trees. But an environmental law professor says the rarely-laid charges against Lake Louise Ski Area illustrate problems with how the Species At Risk Act is enforced. The ski resort in Banff National Park is expected to appear in court Monday to address charges laid after it came to light that in 2013, resort employees had cut down a stand of trees alongside a run that included at least 39 whitebark pine. …Resort spokesman Dan Markham acknowledges the trees were cut. Workers were conducting routine thinning of trees alongside a run to improve skier safety, he said. Markham said the workers were unaware the trees were endangered.