Damage from border wall: blown-up mountains, toppled cactus

GUADALUPE CANYON, Ariz. (AP) —

Work crews ignite dynamite blasts in the remote and rugged southeast corner of Arizona, forever reshaping the landscape as they pulverize mountaintops in a rush to build more of President Donald Trump’s border wall before his term ends next month.

Each blast in Guadalupe Canyon releases puffs of dust as workers level land to make way for 30-foot-tall (9-meter-tall) steel columns near the New Mexico line. Heavy machines crawl over roads gouged into rocky slopes while one tap-tap-taps open holes for posts on U.S. Bureau of Land Management property.

Trump has expedited border wall construction in his last year, mostly in wildlife refuges and Indigenous territory the government owns in Arizona and New Mexico, avoiding the legal fights over private land in busier crossing areas of Texas. The work has caused environmental damage, preventing animals from moving freely and scarring unique mountain and desert landscapes that conservationists fear could be irreversible. The administration says it's protecting national security, citing it to waive environmental laws in its drive to fulfill a signature immigration policy.

Environmentalists hope President-elect Joe Biden will stop the work, but that could be difficult and expensive to do quickly and may still leave pillars towering over sensitive borderlands.

The worst damage is along Arizona’s border, from century-old saguaro cactuses toppled in the western desert to shrinking ponds of endangered fish in eastern canyons. Recent construction has sealed off what was the Southwest’s last major undammed river. It's more difficult for desert tortoises, the occasional ocelot and the world’s tiniest owls to cross the boundary.

“Interconnected landscapes that stretch across two countries are being converted into industrial wastelands,” said...