Willow River Geothermal in Pine County Geothermal We would like to welcome you to Willow River Geothermal 's Pine County geothermal resource center. We're proud to be a full-service provider of geothermal products for the Pine County area. Whether you need standard maintenance, equipment repair, or a total comfort system - Willow River Geothermal has the education and ability you need. Let us provide you a solution that uses the clean, renewable energy in your backyard to provide savings up to 70% on heating, cooling and hot water. To find out more about our complete line of energy-saving geothermal products for the Pine County area, contact Willow River Geothermal today.