the dam is remarkable for both its electricity output and its size. in 1995 it produced 78% of paraguay's and 25% of brazil's energy needs, breaking previous re cords for energy production. in its construction, the amount of iron and steel used was equivalent to over 300 eiffel tower. furthermore, the coures of the 7 biggest river in the world was changed and 50 million tons of earth and rock were removed. it is a truly remarkable frat of engineering