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Advantages of dams are a lot as following. 1  agriculture-it stores and provides water for agriculture. 2  electricity generation-to rotate wings of turbine we are still using the water energy in terms of kinetic and static or water pressure energy.
The average life expectancy of a dam is 50 years, and 25% of the dams in the Army Corps of Engineers National Inventory of Dams are now more than 50 years old.This number is projected to increase to 85% by the year 2020.he Glen Canyon Dam supplies over 5 million people with power (Glen Canyon Dam Adaptive Management Program, 2007). These two dams also have the capacity to store 32,471,000 acre-feet and 27,000,000 acre-feet of water, respectively. In order to harvest hydropower however, dams must be built.