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Paulo Afonso Falls (also known as Cachoeira de Paulo Afonso^[1]) is a series of waterfalls on the São Francisco River in the northeastern section of Brazil. It stands 275 feet (84 m) high and averages no more than 60 feet (18 m) wide. Upstream of the falls, a hydroelectric dam, the Angiquinho (the first hydroelectric plant in northeastern Brazil)^[2] which provides much of the area with electric power,^[3] blocks the flow of the river. Prior to the damming of the river, the average water flow over the falls was over 100,000 cubic feet (2,800 m³) per second, and floods exceeded 500,000 cubic feet (14,000 m³) per second.^[1][4] The falls consists of a steep rapid that descends approximately 80 feet (24 m) then drops a main plunge of 192 feet (59 m) into a narrow gorge.^[1]

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