Underground development at N.W.T.’s Ekati mine needs Tłı̨chǫ gov’t sign-off, says regulatory board May 1, 2024 by Sasquatch If the company that owns the Ekati diamond mine in the N.W.T. wants to proceed with an underground mining project, it has to get sign-off first from the Tłı̨chǫ government, a regulatory board has ruled.