Hydroelectric dams can be used to provide flood control and irrigation  The large water reservoirs created by hydroelectric dams can provide facilities for water sports and can become tourist attractions themselves. The reservoirs can be used for irrigation to help farmers and can be a means for flood control. A prime example of this is the Tennessee Valley Authority, an organisation responsible for flood control, electricity generation, economic development and even fertilizer generation in the Tennessee Valley in the U.S., spanning parts of Alabama, Mississippi, Kentucky, Georgia, North Carolina and Virginia. [1]  [1] Tennessee Valley Authority, homepage.