51.   Then the drought took the huge hydroelectric dams out of the equation and rationing became necessary.

52.   They include modifications of hydroelectric dam operations, meant to improve water temperatures and flows and help fish swim around the dams on the Columbia and Snake rivers.

53.   This part of the Ocoee always has been an easy target for vandals, since the riverbed is dry much of the time because of a hydroelectric dam upstream.

54.   Wolfensohn has moved the institution away from grand projects like building hydroelectric dams and toward education programs and credit assistance to people starting small businesses.

55.   Wolfensohn has moved the institution away from grand projects like building hydroelectric dams and toward education programs and credit assistance to women and other people starting small businesses.

56.   Part of the money will be used to build three hydroelectric dams and artificial lakes to hold drinking water.

57.   A group of Maori tribes is claiming ownership of three rivers in their area, threatening to close hydroelectric dams and charge river users once they take control.

58.   A relatively dry winter has caused water levels to be lower than normal at hydroelectric dams in the Northwest, raising fears about electricity production this spring.

59.   A short-term answer may be to use hydroelectric dams as storage systems.

60.   A relatively dry winter has caused water levels at hydroelectric dams in the Northwest to be lower than normal, raising concern about electricity production this spring.