Oil surfaces along pipeline in South Dakota, but no damage found

FREEMAN, S.D. -- TransCanada officials are still searching for the cause of an oil slick discovered in southeast South Dakota that shut down a major pipeline.

A team of about 100 workers assembled by TransCanada continued the excavation of part of its Keystone oil pipeline Monday after a landowner reported seeing standing oil in a field Saturday afternoon, about 5 miles southwest of Freeman, which about 50 miles southwest of Sioux Falls.

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