ABOVE PHOTO: A construction worker finishes cement work on a mine adit closure. The finished product will allow bats and small creatures through, but keep humans out.

In the southwestern corner of New Mexico, the Bureau of Land Management is closing more than 300 mine features -- adits, shafts and other open spaces. Frequently hidden from view, these sites were abandoned years ago and can be dangerous for humans unfamiliar with the area where they are located. Some of these features also provide a glimpse into the nation's mining history. 

Simply closing mines is not a blanket solution. Some of these are home to animal species like the Mexican long-nosed bat -- also called the greater long-nosed bat -- a small species that was listed as endangered by the U.S. Fish & Wildlife Service in 1988. While the process of closing the mine features has been ongoing since 2016, BLM received funding through the Bipartisan Infrastructure Law in 2022 to restore the abandoned mine lands. For Physical Scientist Chris Teske, this involves improving the bat habitat as well as making the area safer.