The 44 MW Castle River wind facility is a wholly-owned facility that is comprised of 66 Vestas wind turbines (3 Vestas V44 600 kW wind turbines and 63 Vestas V47 660 kW wind turbines) on 50 metre towers, and is located southwest of Pincher Creek, Alberta. This facility also includes an additional six turbines, totalling 4 MW, that are located individually in the Cardston County and Hillspring areas of south-western Alberta. This facility began commercial operations in stages from November 1997 through to July 2001. Generation from this facility will be subject to the terms of a TransAlta PPA that terminates in 2027. Management believes that the estimated annual gross generation from the facility will be approximately 121 GWh. A portion of the Castle River wind farm creates offset credits until 2014.