FILE - This Dec. 10, 2016, file photo, provided by the North Dakota Department of Health shows an oil spill from the Belle Fourche Pipeline that was discovered Dec. 5, 2016 in Ash Coulee Creek, a tributary of the Little Missouri River, near Belfield, N.D. Authorities say the pipeline spill is now believed to be three times larger than first estimated, and one of the biggest in state history. (Scott Stockdill/North Dakota Department of Health via AP, File)
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