The San Roque Dam, operated under San Roque Multipurpose Project (SRMP) is a 200-meter-tall, 1.2-kilometre (0.75 mi) long embankment dam on the Agno River. 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, nearly 200 km north of Metro Manila.
Power
The SRMP has an installed rated capacity of 345 megawatts (MW). It operates primarily as a peaking plant during periods each day when the electrical output of base and inter-mediate load power plants cannot fulfill consumer demand. Capacity of 100 MW, which is the basis for the capacity payments under the PPA. The balance is surplus power that reduces dependence on imported fuel oil and also lowers the variable operating expenses of other power plants. The SRMP offers substantial power benefits in addition to the peaking capacity and energy considered in the economic analysis conducted by NPC and the National Economic Development Authority. Most of these benefits are unique to large hydroelectric facilities. ==Irrigation==
Irrigation
The SRMP can provide year-round irrigation benefits for 708 square kilometers of farmland downstream of the dam with a partially diversified crop during the dry season, mostly in Pangasinan, but including parts of Nueva Ecija and Tarlac. ==Flood control==
Flood control
The SRMP produces a marked attenuation (reduction) in the perennial flooding of the Agno River affecting at least 16 Pangasinan and Tarlac towns. It is complemented by the 3-phase, PhP200 billion Agno Flood Control Project managed by DPWH. Phases I, II, and II are completed since 2009. ==Water quality==
Water quality
The SRMP improves the quality of the water in the Lower Agno River via a proactive integrated watershed management plan (IWMP) and by trapping sediments caused by erosion and by such other sources as small-scale mining. ==References==