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Construction begins on 27-mile long stretch of border wall across Arizona's San Rafael Valley

A Normany barrier along the U.S.-Mexico border southern Arizona. The barriers stop vehicles from crossing in remote areas.
Ron Dungan/KJZZ
A Normany barrier along the U.S.-Mexico border southern Arizona. The barriers stop vehicles from crossing in remote areas.

The Center for Biological Diversity says construction has officially broken ground on a new border wall segment in the San Rafael Valley.

The San Rafael Valley is a stretch of borderland dotted with towering mountain peaks called sky islands — where vastly different ecosystems exist in a single range.

The Trump administration announced plans to wall off roughly 27 miles of the valley earlier this year and has since awarded the company Fisher Sand and Gravel with a government contract of up to $339 million to build that wall.

Images collected by the Center for Biological Diversity staff show piles of dirt being moved by huge construction vehicles and a 30-foot steel bollard segment that’s been painted black. The group says construction will cut off critical corridors for cross-border species like the black bear, ocelot and jaguar.

More Southwest Border news

Alisa Reznick is a senior field correspondent covering stories across southern Arizona and the borderlands for the Tucson bureau of KJZZ's Fronteras Desk.