Hotch has an infectious, boyish laugh – but there is no mistaking how worried he is about plans to build a mine where millions of pounds of zinc, copper, lead, silver and gold are buried, beneath the valleys’ mountains. We arejust miles from the headwaters of the Chilkat, the glacial river that serves as the main food source of the Tlingit, the region’s Indigenous people, as well as the inhabitants of Haines, the nearest port town.