The Bureau of Land Management (BLM) did not need to take into account the effects of a future mine when it approved Constantine Metal Resources’ permit to conduct Palmer Project exploration work, the 9th Circuit Court of Appeals said in an opinion published Friday, which upholds the 2019 ruling of the federal District Court in Alaska.

In December 2017, the Chilkat Indian Village of Klukwan and three environmental groups—Southeast Alaska Conservation Council, Lynn Canal Conservation…