Major Dams in the Philippines: Angat Dam: Angat Dam is a concrete water reservoir embankment hydroelectric dam that supplies the Manila metropolitan area water. It was a part of the Angat-Ipo-La Mesa water system. Angat dam supplies potable water and energy to Metro Manila and nearby areas. Surrounded by lush greens, this place is also ideal for fishing, boating and hunting. It is located in Barangay San Lorenzo, Norzagaray, Bulacan, Philippines. The reservoir supplies about 90 percent of raw water requirements for Metro Manila through the facilities of the Metropolitan Waterworks and Sewerage System and it irrigates about 28,000 hectares of farmland in the provinces of Bulacan and Pampanga. Ambuklao Dam: Ambuklao Dam is part of a hydroelectric facility in Brgy. Ambuclao, Bokod, Benguet province in the Philippines. The development of the Agno River for purposes of hydroelectric power generation, flood control, and irrigation had been conceived as early as the late 1940s. It is a central core rock-fill embankment. Agusan Dam: Agusan Dam is the downstream plant of two proposed plants that were constructed in the province to serve the immediate industrial and domestic needs of the area. Though its watershed is small, just covering an area of around 25 square kilometers, its run-of-river facility consists of two 800-kiloWatt turbine generators, which use water from the Agusan River for electricity generation. It is a concrete flow type of dam. Lamesa Dam: The La Mesa Dam and Reservoir is an earth dam whose reservoir can hold up to 50.5 million cubic meters and occupying an area of 27 square kilometers in Quezon City, Philippines. It is part of the Angat-Ipo-La Mesa water system, which supplies most of the water supply of Metro Manila. Magat Dam: Magat Dam is a large rock-fill dam in the island of Luzon in the Philippines. The dam is on the Magat River, a major tributary of Cagayan River. Magat Dam is one of the largest dams in the Philippines. It is a multipurpose dam which is used primarily for irrigating about 85,000 hectares of agricultural lands, flood control, and power generation through the Magat Hydroelectric Power Plant. San Roque Dam: The San Roque Dam has a height of 200 m above the existing river valley floor. It is a central clay-core rockfill dam with a compacted fill volume totaling nearly 40 million cubic meters. It is the largest dam in the Philippines and sixteenth largest in the world. It spans the municipalities of San Manuel and San Nicolas, Pangasinan and is nearly 200 km north of Metro Manila. Gated spillway protects the dam from overtopping. Each wet season, the run-off is stored for later release via water turbines to generate power and irrigate crops. Wawa Dam: Wawa Dam is a gravity dam constructed over the Marikina River in the municipality of Rodriguez in Rizal province, Philippines. The slightly arched dam is situated in the 360metre (1,180 ft) high Montalban Gorge or Wawa Gorge, a water gap in the Sierra Madre Mountains, east of Manila. It used to be the only source of water for Manila until Angat Dam was built and Wawa was abandoned.