00:59 Lower Rio Grande Could Become One of America’s Most Endangered Rivers An advocacy group has listed the Lower Rio Grande as one of the 10 most endangered U.S. rivers of 2018, blaming President Trump’s proposed border wall.

At a Glance An advocacy group listed the Lower Rio Grande as one of the 10 most endangered U.S. rivers of 2018.

American Rivers blames President Donald Trump's proposed border wall for landing the river on the list.

They say it could have catastrophic consequences on the ecosystem around the river.

Proposals by President Donald Trump to build a border wall along the Lower Rio Grande in South Texas earned the waterway a spot on the list of America's most endangered rivers, an advocacy group announced recently.

American Rivers put the Lower Rio Grande on its list of America's Most Endangered Rivers 2018 because it says the new wall will wreak havoc on the wildlife and water flow. The river which divides Texas and Mexico could soon have hundreds of miles of the wall along the waterway, including the Lower Rio Grande floodplain, the report added.

"It’s important to note that this isn’t a list of the worst rivers or most polluted rivers ," Amy Kober, national communications director for American Rivers, told Earther. "It’s a list of the most endangered rivers, so what we mean by that is a river facing a critical threat."

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If the wall is built, the Lower Rio Grande and its floodplain will essentially be separated, and that could cause all kinds of new flooding problems, American Rivers said. The wall could also lead to more erosion, and it might even keep wildlife from getting to the river – even animals, some endangered, that call the area home.

American Rivers has been compiling the list of the 10 most endangered rivers for 33 years, and although this isn't the first time the Lower Rio Grande River has been on the list, it was never listed because of the border wall until 2018, Earther also said. Although it has been threatened by dams and too many water withdrawals in the past, it's the wall that could finally kill this river, American Rivers added.

"It’s not the border wall that caused the river to be in such bad shape ," Sierra Club Borderlands Team co-chair Scott Nicol told the Texas Observer, "but the border wall could be a last nail in the coffin."