NioCorp to Begin Construction of Mine Portal at Its Elk Creek Critical Minerals Project

Portal Will Establish the Mine Entrances and is a Critical First Step in Enabling Underground Mine Access and Advancing the Project Portal Project Expected to Commence in Q1 of Calendar Year 2026 CENTENNIAL, CO / ACCESS Newswire / December 22, 2025 / NioCorp Developments Ltd. ("NioCorp" or the "Company") (Nasdaq:NB), a leading U.S. critical minerals developer, today announced that its Board of Directors (the "Board") has approved the Company's Mine Portal Project (the "Portal Project"), a major initiative t ...