Corrosion resistant alloys and non-metallic coating have been tested by exposure to Glenwood Springs geothermal water in a test loop constructed for the purpose adjacent to the Glenwood Springs geothermal well. Several alloys were tested. None of the materials showed any measurable degradation during the test. However, it is recommended that the results be applied with caution; several factors suggest that the data from these tests might be overly optimistic and that corrosive conditions in practice could be more severe. Based on this study and previous studies on geothermal heating of bridge decks, consideration for geothermal heating of two structures in Glenwood Canyon is underway.