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Though the area receives about 18 inches (460 mm) of precipitation on average per year, alone it is not enough to support the abundant animal and plant life. Trees and other plants help to control surface runoff. Dikes, seeps, and springs help to dam up water that is flowing downhill, providing watering spots for animals. In addition, stones like sandstone and limestone help to hold groundwater, creating aquifers.
Tourism is South Dakota's second-largest industry, with Mount Rushmore being its number one tourist attraction. In 2004, over two million visitors traveled to the memorial. The site is also home to the final concerts of Rushmore Music Camp and attracts many visitors over the week of the Sturgis Motorcycle Rally.
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On 2009/01/10, Will said:
Feel free to post any comments or questions here. I will reply as soon as I am able.
Thanks for your time, and I look forward to hearing from you. -- Will.
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