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			Barton Springs Pool The Barton Springs Pool is man 
			made and a recreational swimming pool found in Zilker Park in 
			Austin, Texas, however, it sits inside the channel of the Barton 
			Creek, and is constantly filled with water by the Main Barton 
			Spring, the fourth biggest in the state, and the variance in 
			temperature differs by only a few degrees because of the constant 
			flowing by the creek. In the winter, the water stays around 68 
			degrees and in the summer, 71 or 72 degrees. Before the pool was 
			constructed, the springs had been thought of as sacred and used in 
			the purification rights of the Tonkawa Native American tribe that 
			live in the region; and when the Spaniards arrived, in the 17th 
			century, they build temporary missions there, which later had been 
			moved to San Antonio. In 1837, William Billy Barton, came to the 
			area and named each of the springs after his daughters, Zenobia, 
			Parthenia and Eliza; and those landowners that came here after him 
			also realized the potential of the springs and it kept its 
			popularity by their continuous promotions. Andrew Jackson Zilker was 
			the last private citizen to own the springs, and he donated it to 
			the city in 1918, and in the 1920s, they would increase the size of 
			it by damming the springs, and creating a sidewalk. Because of its 
			incorporation into the creek, there have been numerous instances 
			when it had to close while the e coli bacteria would decrease, and 
			many subdivisions that are built upstream are believed to have been 
			the cause of this calamity, but now a group calling themselves the 
			Save our Springs Alliance, (SOS), has come forward to be involved in 
			the policies of the lake, and starting other green initiatives in 
			the city. Then a discovery was made that involved the Barton Springs 
			salamander, but soon everyone agreed that since these creatures had 
			co-existed since the beginning, they would be ok.
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