Bluespring Caverns

Bluespring Caverns

Bluespring Caverns is a cave system stretching convert|21.5|mi|km located in Lawrence County, Indiana, approximately 80 miles (128 km) south of Indianapolis. The cave system is a karst and river type cave formation and drains a 15 miles² (38.8 km²) sinkhole plain. The cave is most notable for having the longest known subterranean river in the United States with approximately convert|3|mi|km of navigatable river, and more than convert|21|mi|km of stream and river passages.

Discovery

The cave system was discovered as early as the 1800s. Up until 1913, the entrance used was the exodus of a spring which drained into the White River. However, a dam completed in 1913 on the White River closed off this entrance. In 1940, a second entrance was created after a severe storm passed through the area. A small pond on the farm of George Colglazier vanished overnight, becoming a sinkhole, and the present day entrance into the cave system. The undeveloped cave soon had Colgazier's children wanting to learn more about the newest adventure spot on the family's convert|100|acre|km2|sing=on farm. Although his daughters Uzahne and Janet were not frequent visitors to the cave; his sons, Norman, James, Lee and Daniel were fascinated by the cave. Soon word of the largest opening of Bluesprings Caverns spread and the Colglazier family welcomed visitors from around the world as others descended on the small farm to explore the caverns. George Colglazier and his wife, Eva, lived on their family farm and welcomed visitors to the caverns until the death of George Colglazier in the early 80's. Colglazier nor his wife ever profitted from Bluesprings Caverns, they made their living as hard working dairy farmers. They freely allowed cave explorers on their property and asked them to obey one rule, "not to destroy or remove from the caverns".

Geology and temperature

The cave was formed in two types of limestone, separated by a thin layer of shale. The two types of limestone are:

* Indiana Limestone
* St. Louis Limestone

The cave remains a constant 54°F (14°C) temperature throughout the year.

Inhabitants

The cave is host to a number of species, including crayfish, salamanders, crickets, spiders, and beetles. Most notable among these is the rare sightless Northern Cavefish, which is abundant in this cave system. A small number of bats make this cave their home, especially during winter. However, the frequent flooding of this cave system discourages bat habitation year-round.

Visitation

Visitation to the cave is controlled by Bluespring Caverns Park, a commercial corporation. The featured activity is an hour long boat ride on the subterranean river in a 17 person boat equipped with lighting. This ride is offered seasonally in the months of April through October. The park also offers overnight adventures for organized youth groups from October through April.

Bluespring Caverns are one of four show caves in Indiana. The other three are Marengo Cave, Wyandotte Caves, and Squire Boone Caverns. Twin Caves, located in Spring Mill State Park, about 15 minutes south of Bluespring Caverns, near Mitchell, Indiana offers a 20 minute boat tour into the cave which goes back about convert|600|ft|m. Twin Caves is owned and operated by the state of Indiana and the Indiana Department of Natural Resources

Facts

* The cave is the 41st longest in the world.

* The cave is the 8th longest in the United States.

* The cave is the longest cave in the state of Indiana as of the middle of 2006. [http://www-sop.inria.fr/agos/sis/DB/world.bylength.html]

External links

* [http://www.bluespringcaverns.com/index.html Official website]
* [http://www.showcaves.com/english/usa/showcaves/Bluespring.html Showcaves.com - Bluespring Caves]


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