The Reventazón River or Rio Reventazón (Spanish pronunciation: [reβentaˈson]), is a river in Costa Rica which forms part of the Reventazón-Parismina drainage basin, it is 145 km long and flows into the Caribbean sea. It starts at the base of the Irazú Volcano, passing through the east side of the Central Valley, and flows through the Orosí and Turrialba Valleys. After reaching the Caribbean coastal plains it joins the Parismina River and forms what is called the Reventazón-Parismina. In its upper segments, the Reventazón River is the source of 25% of the drinking water of Costa Rica's largest metropolitan area centered on San Jose. The river is very important for power generation. Three reservoirs in the river, Lake Cachí (100.8 MW), Angostura (177MW) and Reventazón Dam (305.5MW) are used for generating a significant share of Costa Rica's electricity. The dam for a third reservoir, Reventazón (305MW), was completed and opened in 2016. The river is also important for tourism, specially for whitewater rafting.
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