Harrison Spring
Harrison Spring is the largest spring in the state of Indiana. It is located in west-central Harrison County, near the Blue River and just north of White Cloud.
The Spring
A portion of the water that feeds the spring originates from Indian Creek, and then goes underground until it reaches the spring area. The water percolates through a layer of Pleistocene alluvium cavern (Karst) beneath the surface of the ground and flows into a pool measuring 100 feet (30 m) by 80 feet (24 m), about 800 sq ft (74 m2) of surface area, and contains 86 million US gallons (330,000 m3) of water. It is within an abandoned meander loop, and in the periphery a natural levee. Divers have measured its depth to be between 35 and 40 feet (12 m). It produces at least 3 million US gallons (11,000 m3) of water a day at an average of 18,000 gpm, enough to supply water to an average town of 12,000. On rainy days the spring can produce as much as 30 million US gallons (110,000 m3) of water a day. The water from the spring overflows into an outlet that travels about half a mile before merging with Blue River as a tributary.