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Geist Water Levels Reach Lowest Level Since 1980's
Geist Reservoir is one of three reservoirs used to supplement the Indianapolis Water supply. When rainfall is low or other factors affect the flow of rivers and creeks, water is pulled from reservoirs to supplement the flow to treatment plants.
Geist reservoir flows to the Fall Creek water treatment plant. Geist Reservoir dam has an outlet valve that can be opened to allow an increase in water flow to the treatment plant. The decision to open or close the valve is based on information collected daily, so enough water can be produced to meet consumer demand. This usually occurs during periods of low precipitation. When the valve is open, the reservoir can drop 1- 3 inches per day, depending on the amount of water discharged. The lowest level for Geist Reservoir was 6.64 feet below the top of the dam on November 3, 1988.