Enbridge said the spill on the company’s Line 6 was caused by a faulty connection on a pump transfer pipe. Roughly 70,000 gallons (264,978 litres) of oil from a pipeline spilled into the ground in Wisconsin, officials said.The problem was discovered Nov. 11 in Jefferson County, 60 miles (96.5 kilometers) west of Milwaukee, by an Enbridge Energy technician, the Milwaukee Journal Sentinel reported, citing a federal accident report.Enbridge said the spill on the company’s Line 6 was caused by a faulty connection on a pump transfer pipe at the Enbridge Cambridge Station.