The Protectors Get Noticed - National Geographic article

"...the U.S. Forest Service, a primary agency that would oversee such a project—since this section of border abuts Coronado National Forest—did not authorize the unsanctioned work. The project runs afoul of several major federal laws, such as the Endangered Species Act."

https://www.nationalgeographic.com/environment/article/illegal-border-barrier-threatens-wildlife-arizona-mexico-border