TransCanada sends more crews to Keystone pipeline leak

FILE- This Nov. 6, 2015, file photo shows a sign for TransCanada's Keystone pipeline facilities in Hardisty, Alberta, Canada. TransCanada Corp.’s Keystone pipeline leaked oil onto agricultural land in northeastern South Dakota, the company and state regulators said Thursday, Nov. 16, 2017, but state officials don’t believe the leak polluted any surface water bodies or drinking water systems. (Jeff McIntosh/The Canadian Press via AP, File)

AMHERST, S.D. (AP) – TransCanada Corp. says the company has sent additional crews and equipment to the site of a 210,000-gallon oil spill from its Keystone pipeline in South Dakota.

TransCanada said Saturday it is making progress in its investigation into the spill cause on farmland in Marshall County, near the North Dakota border, about 250 miles (402 kilometers) west of Minneapolis. But the company did not elaborate on the cause. The company says additional equipment and workers continue to be dispatched to the site.

Crews shut down the pipeline Thursday after discovering the leak.

TransCanada says the leak is under control and there is no significant environmental impact or threat to the public.

Nebraska regulators vote Monday on a proposed Keystone XL route, an expansion that also would be operated by TransCanada.