Issue brief on the MNC Environmental Assessment


The existing Montrose-Nucla-Cahone 115 kilovolt (kV) transmission line has been in place for almost 60 years. Tri-State studied multiple ways to address the aging infrastructure, improve reliability and meet significant new demand in the region. These studies showed the need to rebuild this transmission line from 115kV to 230kV to increase capacity. So in 2013 Tri-State began the permitting process to upgrade/rebuild the line by initiating the Montrose-Nucla-Cahone Transmission Improvement Project (MNC Project).