Eng Souza Dias Dam

Engineer Souza Dias Dam
Location of Engineer Souza Dias Dam in Brazil
Official name	Engineer Souza Dias Hydroelectric Power Plant
Location	Três Lagoas, MS, Brazil
Coordinates	20°46′40″S 51°37′45″W / 20.77778°S 51.62917°W / -20.77778; -51.62917Coordinates: 20°46′40″S 51°37′45″W / 20.77778°S 51.62917°W / -20.77778; -51.62917
Opening date	1968
Owner(s)	CESP
Dam and spillways
Type of dam	Embankment, concrete portion
Impounds	Paraná River
Height	53 m (174 ft)
Length	5,495 m (18,028 ft)
Spillway type	Service, gate-controlled
Spillway capacity	44,696 m3/s (1,578,400 cu ft/s)
Reservoir
Creates	Engineer Souza Dias Reservoir
Total capacity	3.353 km3 (2,718,000 acre⋅ft)
Catchment area	470,000 km2 (180,000 sq mi)
Surface area	330 km2 (130 sq mi)
Power Station
Commission date	1969–1974
Type	Conventional
Turbines	14 x Kaplan turbines
Installed capacity	1,551.2 MW (2,080,200 hp)

The Engineer Souza Dias Dam, formerly known as the Jupiá Dam is an embankment dam on the Paraná River near Três Lagoas in Mato Grosso do Sul, Brazil. It was constructed for hydroelectric power production, flood control and navigation. Studies on the dam and power plant began in 1951 which recommended the dam along with the Ilha Solteira Dam. The dam was inaugurated in 1968 and its generators were commissioned between 1969 and 1974.

The Souza Dias Dam is a 53-metre (174 ft) high and 5,495-metre (18,028 ft) long combination concrete gravity and embankment dam. The concrete power plant, navigation lock and spillway section of the dam measures 1,040 metres (3,410 ft) long while the earth-fill embankments flanking the concrete section measure 2,070 metres (6,790 ft) long on the right and 2,385 metres (7,825 ft) long on the left. The reservoir created by the dam has a 3.353 cubic kilometres (2,718,000 acre⋅ft) capacity of which 900,000,000 cubic metres (730,000 acre⋅ft) is active or "useful" storage. The reservoir has a catchment area of 470,000 square kilometres (180,000 sq mi) and surface area of 330 square kilometres (130 sq mi). The dam's spillway contains 37 floodgates, each with a 1,208 cubic metres per second (42,700 cu ft/s) discharge capacity for a total discharge of 44,696 cubic metres per second (1,578,400 cu ft/s). The average long-term flow at the dam is 6,350 cubic metres per second (224,000 cu ft/s) and the record maximum flow was 28,943 cubic metres per second (1,022,100 cu ft/s) which was reached on October 2, 1983.

The dam's navigation lock is 210 metres (690 ft) long, 17 metres (56 ft) wide and affords transportation on the Paraná and Tietê Rivers. It was inaugurated January 1998.

The dam's power station contains 14 x 110.8 megawatts (148,600 hp) generators that are powered by Kaplan turbines for a total installed capacity of 1,551.2 megawatts (2,080,200 hp). In addition, the power station contains two 5 megawatts (6,700 hp) service generators for powering the dam's facilities itself. Together, dam's generators are designed to discharge 6,440 cubic metres per second (227,000 cu ft/s) of water, bringing the total discharge capability of the dam to 50,130 cubic metres per second (1,770,000 cu ft/s) at a reservoir elevation of 280.5 metres (920 ft) above sea level.