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Serra da Mesa Reservoir on Tocantins River, Brazil

13.5S 48.2W

August 28th, 2011 Category: Lakes

Brazil - July 23rd, 2011

The Serra da Mesa Dam (center), once known as Sao Felix, is an embankment dam on the Tocantins River near Minaçu in Goiás, Brazil. The dam serves an associated hydroelectric power plant with a 1,275 MW installed capacity and creates the largest reservoir by volume in Brazil.

The Serra da Mesa Dam is a 1,500 m (4,900 ft) long and 154 m (505 ft) tall earth-fill embankment dam with a clay core and in total contains 12,057,558 m3 (425,808,600 cu ft) of material. The reservoir created by the dam has a capacity of 54,400,000,000 m3 (1.92×1012 cu ft) and surface area of 1,784 km2 (689 sq mi). Of the reservoir’s volume, 43,250,000,000 m3 (1.527×1012 cu ft) is active (live or “useful”) storage.

The dam supports a spillway with five floodgates that are 15 m (49 ft) wide and 20.4 m (67 ft) high each. In total, the spillway has a 15,000 m3/s (530,000 cu ft/s) discharge capacity.

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