The Pulangi IV Hydroelectric Plant watershed (also known as the Upper Pulangi Watershed) is the second largest watershed in the Philippines, covering an area of around 1.8 Million hectares.[1] It has ten catchments and covers the cities and municipalities of Impasugong, Cabanglasan, San Fernando, Lantapan, Maramag, Quezon, Valencia City, and Malaybalay City.