Olmsted County

Graham IV Ice Arena

Rochester, Minnesota


Replacing a 40-year-old ice-making equipment and natural gas furnaces, Graham IV Ice Arena employs state-of-the-art, energy-efficient geothermal technology to reduce fossil-fuel use, greenhouse-gas emissions, and operation-and-maintenance costs. Overall energy savings equal 50 to 60 percent over the old system.

The arena's "green" solution for ice-making equipment uses a clean, renewable heat source--the earth. The geothermal system consists of nearly 45 miles of networked tubing between the ground exchangers and the rink piping. The technology converts the earth's constant 56° F temperature into renewable energy to fuel the ice-cooling systems as well as heat the common areas through "waste" hea