Unfortunately, even at this late stage, Sawmill can still steal the glory. While the water is rising at Penta, it is also rising at Sawmill. If Sawmill erupts first, Penta will begin to drain and not erupt. Penta often stops within a few minutes of the end of Spasmodic's eruption. It is a fountain-type geyser, its bursting eruptions playing through a funnel shaped pool.
Typical intervals are one to three hours.
Durations can range from 9 minutes to more than 4 hours with most in the 30 to 50 minute range. Heights can exceed 35 feet. When the complex is in the Sawmill Mode , Sawmill Geyser is usually in eruption about one third of the time. Either way, Sawmill is an enjoyable geyser. It is fun to watch and to hear.