A 98-foot-tug ran aground and sank off Bella Bella, BC, last year, spilling more than 28,000 gallons of diesel fuel, because the second mate fell asleep at the wheel, according to the National Transportation Safety Board. Bella Bella, about 98 nm north of Port Hardy on Vancouver Island, is one of the most beautiful parts of the Inside Passage, and is home to the Heiltsuk First Nation. The accident occurred on Oct. 13, 2016, when the tug Nathan E. Stewart, with an articulated barge, ran aground and sank in Seaforth Channel, just west of Bella Bella. The NTSB investigation says…