FILE - This March 14, 2014 file photo released by the North Dakota Department of Health, shows an oil well that was swamped by floodwaters near the confluence of the Yellowstone and Missouri rivers near Williston, N.D., An environmental geologist said up to 1,400 gallons of oil might have spilled from the well site into the floodwaters. The North Dakota Health Department said Thursday, March 27, 2014 that cleanup will continue for at least another week at the site. (AP Photo/North Dakota Department of Health, File)
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