The Con Mine will be a seasonal heat storage system, storing solar, excess hydro and waste heat energy from the CHP plant in the water of the flooded mine during the summer. [...] In the winter, heat pumps will draw the heat back from the mine and be combined with heat from the CHP plant to heat homes and buildings through a district heating system. [...] In the rest of Canada, a vision is developing of a 100% renewable energy society based on a shift in heating and transportation towards electricity and a shift towards renewable electricity generation from wind and solar systems.7 8 The NWT is a special place with unique challenges and opportunities. [...] ASSUMPTIONS & LIMITATIONS Addressing the energy use of all sectors of a society within the confines of a small project budget requires some constraints and assumptions on the scope of the study. [...] The rhythms of human activity may be different in the NWT than in other parts of the world, which means that the energy demands may also be different.