In the uplands of far eastern Casey County about three-fourths of the wells drilled yield enough water for a domestic supply. In the rest of the county very few wells yield enough water for a domestic supply; in a few lowland areas bordering streams, a few wells may meet domestic needs. Because of perched water bodies with limited recharge zones, many wells in this area go dry in late summer and fall. Numerous small springs and seeps are found throughout the county. Most discharge from small solution openings and joints in limestone or siltstone and are supported by shale layers. Flows are as much as 20 gallons per minute, but most have minimum flows of less than 1 gallon per minute.

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