Northstone Power Corp. is an Alberta based independent power producer with a natural gas power plant located near Elmworth, Alberta, 60 kilometers southwest of Grande Prairie. Their Elmworth Generation Station is a 7,200 square foot facility that currently houses two 9.3MW Wartsila 20V34SG reciprocating engines.

Northstone operates the plant as a merchant peaking plant which means as the power pool prices rises above the production cost, then the units are turned on and power is generated until the pool price falls below the production costs once again. Typically, power prices are high during cold winter months, warm summer months, or when there are unplanned outages of one or more of the larger generating plants in the province.