"Canada's Enbridge Inc. on Sunday raced to repair a major pipeline that spilled more than 1,000 barrels of oil in a Wisconsin field, provoking fresh ire from Washington over the latest in a series of leaks."

"The spill on Friday -- almost two years to the day after a ruptured Enbridge line fouled part of the Kalamazoo River in Michigan -- has forced the closure of a major conduit for Canadian light crude shipments to U.S. refiners and threatens further damage the reputation of a company that launched a more than $3 billion expansion program just two months ago.

Enbridge said it intended to begin repairs to Line 14 late on Saturday after making "excellent progress" in clean-up, allowing for visual inspection of the line. But it still did not know what had caused the incident and provided no estimate on when the 318,000 barrels-per-day Line 14 would resume service."

Brendan O'Brien reports for Reuters July 29, 2012. [2]