Enbridge reports leak on Norman Wells pipeline

CALGARY, Alberta (Reuters) - Enbridge Inc, which operates North America’s largest oil pipeline system, said its Norman Wells pipeline is shut down after a small oil leak earlier this week, the latest in a spate of spills and leaks for Canadian pipeline operators.

The company said about 4 barrels of oil leaked from the northern Canadian pipeline about 50 kilometers (31 miles) south of Wrigley, Northwest Territories. The cause has not yet been determined.

The 39,400 barrel per day line, which runs from Norman Wells, NWT, to Zama, Alberta, was already shutdown because it connects with Plains All American Pipeline LP’s Rainbow pipeline in northern Alberta, shut late last month after a rupture spilled 28,500 barrels of oil.

Along with those incidents, TransCanada Corp’s Keystone system remains closed after spilling 500 barrels of oil in a North Dakota pumping station. As well, Kinder Morgan Energy Partners Trans Mountain line was closed for five days last month after an oil seep was spotted in a farmer’s field west of Edmonton, Alberta.

Reporting by Scott Haggett; editing by Peter Galloway