The vent in the center of the pool opens into a slightly oval cavity with a diameter of about 25 ft, an average depth of 11 ft, and a maximum measured depth of 25 ft. The water is clear, has a bluish tint, and the sandy bottom can be seen easily. The run is 40 to 60 ft wide, averages 2 ft deep, and is about 800 ft long. The bottom is covered with grass, algae, and many logs. Analyses by U.S. Geological Survey.
Units are in milligrams per liter unless otherwise indicated.