In Focus: Rod Colwell on geothermal energy in the Salton Sea Rod Colwell, CEO and founding director of Controlled Thermal Resources, discusses geothermal energy within the Salton Sea area of California, why geothermal energy is a good investment for investors and the future of the geothermal energy market. (03/2018) For more information on Controlled Thermal Resources' Hell's Kitchen Geothermal Project within the Salton Sea area of California, click here.