New Horizon Mine

New Horizon Mine was developed in 1993 as a fuel resource to Tri-State's recently acquired Nucla Station. The mining operation was located about five miles from the now-retired power plant, outside the town of Nucla, Colo.

The mine ceased coal production in 2017, and delivered its last coal to Nucla Station in 2018. Nucla Station was retired from service in 2019. New Horizon Mine is completing major reclamation activities.