Magat Dam
| Magat Dam | |
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The dam, with its entrance sign in the foreground
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.svg)
 Location of Magat Dam in Philippines
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| Location | Santiago City / Alfonso Lista, Ifugao / Ramon, Isabela |
| Coordinates | 16°49′30″N 121°27′14″E / 16.82500°N 121.45389°ECoordinates: 16°49′30″N 121°27′14″E / 16.82500°N 121.45389°E |
| Construction began | 1978 |
| Opening date | 1982 |
| Dam and spillways | |
| Type of dam | Rock-fill dam |
| Impounds | Magat River |
| Height | 114 m (374 ft) |
| Length | 4,160 m (13,650 ft) |
| Reservoir | |
| Surface area | 117 km2 (45 sq mi) |
| Maximum water depth | 193 m (633 ft) |
| Power station | |
| Installed capacity | 360 MW |
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. Construction of the dam started in 1975 and was completed in 1982. Magat Dam is one of the largest dams in the Philippines. It is a multi-purpose dam which is used primarily for irrigating about 85,000 hectares (210,000 acres) of agricultural lands, flood control, and power generation through the Magat Hydroelectric Power Plant.
The water stored in the reservoir is enough to supply about two months of normal energy requirements.
The dam was constructed to last for 50 years but increased siltation and sedimentation in the reservoir, slash-and-burn farming, illegal logging and fish-caging resulted in the deterioration of the dam's watershed. The 1990 Luzon earthquake also contributed to the increased siltation in the Magat River system. Because of this, President Gloria Macapagal-Arroyo instructed various government agencies to create a rehabilitation plan to improve the lifespan of the dam system.
The construction and appurtenant structures was authorized by P.D. 693 signed on May 7, 1975 by the late President Ferdinand E. Marcos. The Magat Dam was constructed in 1978 and inaugurated by the Late Pres. Ferdinand E. Marcos on October 27, 1982 and started operations in 1983.
Implementation of this multipurpose project was based on the preliminary study conducted in 1973 by the National Irrigation Administration (NIA) with the assistance of the United States Bureau of Reclamation (USBR) and the United States Agency for International Development (USAID).
Subsequent detailed and extensive dam site investigation and engineering studies further confirmed the feasibility of what is now known as NIA's most daring infrastructure project and one of Asia's biggest dams today.
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