Aswan Dam in Egypt had to be dredged regularly to remove sediments. After construction of the dam, aquatic weeds grew much faster in the clearer water, helped by fertilizer residues. The total length of the infested waterways was about 27,000 km in the mid-1990s. Weeds have been gradually brought under control by manual, mechanical and biological methods. Mediterranean fishing and brackish water lake fishery declined after the dam was finished because nutrients that flowed down the Nile to the Mediterranean were trapped behind the dam. For example, the sardine catch off the Egyptian coast declined from 18,000 tons in 1962 to a
Jigüey Dam 1992. It cost US$500 million to build and funding was provided by the host government. Jigüey Dam The Jigüey Dam is an arch-gravity dam on the Nizao River about east of San Cristóbal in San Cristóbal Province of the Dominican Republic. At tall, it is the third highest dam in the country. The purpose of the dam is to produce hydroelectric power and it supplies the largest hydroelectric power station in the country. The dam diverts water through over of headrace pipe and penstock to the power station downstream. The power station contains two 49 MW Francis turbine-generators for an