Environmental Protection Agency announced a $1.7 billion plan to remove 4.3 million cubic yards of toxic mud from the bottom of lower eight miles of the river. 2014年4月,美国国家环境保护局宣布了一项17亿美元的计划用于移除下游八英里河段内的淤积于河底的430万立方码(英语:Cubic yard)的有毒泥浆...