Montem first started looking at an end of mine life PHES for Tent Mountain in 2019, undertaking a site assessment and economic analysis. The results were promising, but at the time Montem decided to continue progressing Tent Mountain primarily as a steelmaking coal mine re-start. With the current uncertainty surrounding the timeline of the mine re-start, Montem has brought forward plans to develop a PHES at Tent Mountain. The Tent Mountain PHES will be one of the primary elements of the TM-REX.
Montem has completed various technical, economic, and social studies for the Tent Mountain PHES that show a technically viable project that will create approximately 200 construction jobs and approximately 30 full time operational jobs over a 50+ year project life.