On Saturday morning, a bridge collapse in Montana caused freight train cars to crash into the Yellowstone River, raising concerns about contamination. Montana Rail Link has since released a statement saying that two cars known to be carrying hazardous materials had not entered the river, and that there was "no expected hazmat impact" to towns in the county. Andy Garland, spokesperson for Montana Rail Link, said that the substances in the railcars solidify when exposed to air and water, so there is no risk of contamination.