Hoover Dam provides water and hydroelectric energy to the region where its located, between Arizona and Nevada. The large project uses the Colorado River power resources, and positively impacted the lives of the residents.  Property investor, based in California Kenny Slaught, believes the dam turned many deserted places into big cities. He discusses this on his blog at KennySlaught.com. 

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http://markets.financialcontent.com/investplace/news/read/33814702/Kenny_Slaught_