Pantabangan Reservoir in Nueva Ecija

project in planning

The project involves the development of the Pantabangan Reservoir, an earth-fill embankment dam on the Pampanga River located in Pantabangan in the Province of Nueva Ecija, Philippines.The dam is a 107 m tall and 1,615 m long embankment-type with 12,000,000 cu yd (9,174,658 m3) of homogeneous earth-fill and an impervious core. The dam's reservoir has a gross capacity of 2,996,000,000 m3 (2,428,897 acre·ft) and 2,083,000,000 m3 (1,688,716 acre·ft) of that volume is active (or useful) for irrigation and power. The dam sits at the head of an 853 km2 catchment area and its reservoir has a surface area of 69.62 km2 and elevation of 230 m when at its maximum level. The powerhouse is located at the base of the main dam and contains two 50 MW Francis turbine-generators for an installed capacity of 100 MW. Each turbine receives water via a 6 m diameter penstock. When the water is discharged, it is released into a 250 m-long tailrace channel where it re-enters the river.The multi-purpose dam provides water for irrigation and hydroelectric power generation while its reservoir, Pantabangan Lake, affords flood control. The reservoir is considered one of the largest in Southeast Asia and also one of the cleanest in the Philippines. Construction on the dam began in 1971 and it was completed in 1977.