The spill from the Keystone pipeline in northern South Dakota. Photo by TransCanada.
The TransCanada Keystone 1 pipeline has spilled 5,000 barrels (795,000 litres or 210,000 gallons) of oil in South Dakota.
CBC reports, "A Native American tribe in South Dakota is on edge following a large oil leak from TransCanada's Keystone pipeline. ...[The spill happened] near Amherst, S.D., about 64 kilometres west from the Sisseton Wahpeton Oyate of the Lake Traverse Reservation. ...Tribal chairman David Flute said his community is concerned the leak, the largest by the Keystone pipeline in South Dakota to date, could pollute the area's aquifer and waterways. 'We are keeping a watchful eye and an open ear', said Flute. 'The concern is at a high level, but there is really nothing we can do.'"