Calgary pipeline company TransCanada said it found mechanical damage on its ruptured Bison natural gas pipeline running through Wyoming. Bison Pipeline LLC, a subsidiary of Canadian pipeline company TransCanada, declared a force majeure last week after discovering a rupture on the network. The Bison pipeline was carrying about 365 million cubic feet of natural gas per day when the rupture was reported. James Millar, a spokesman for TransCanada, told the ...