After 15 years in Rice County, Trystar Inc. is planning to build a new $15 million plant in Shakopee. Trystar specializes in products that provide temporary power at construction sites and major sporting events. The Northfield News reports the manufacturing company has doubled in size each of the last three years. Trystar's new facility will be three times the size of its current 60,000 square foot space. The current lease keeps the company in Faribault through at least 2015.