Free guided tours of the dam and power plant are conducted year-round by the Intermountain Natural History Association. The tours take between 45 minutes to 1 hour to complete. Summer tours take place every day from 9 a.m. to 4 p.m. Visitors are required to pass through metal detectors, and large bags are not allowed in the visitor center or on the tours. The parking lot and rest rooms close in the evening. Calling the dam for current tour schedules is recommended as times vary throughout out the season. Phone: 1.435.885.3135.