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An explosion crippled the main pipeline supplying Canadian crude to U.S. Midwest refineries on Wednesday, forcing operator Enbridge to halt nearly a fifth of U.S. imports and sending crude prices as much as $4 higher.
One of the set of four lines will require repairs and regulator inspections, while the largest is "not likely" to start up any time soon, Larry Springer, a spokesman for Calgary, Alberta-based operator Enbridge Inc (ENB.TO), said on Thursday.