Kelly - The backup site was located on a mountain just south of Tenino in Thurston County. They used this site until the new site was constructed on Capitol Peak (which allowed the station to resume full power operations).
True, but they were on the backup site for a year or so while they tried to salvage Rooster Rock. I remember their engineer (Tim) used to tell me the trials and tribulations of poor ol' Rooster Rock after they lost power.