4 dams in Luzon keep gates open

August 23, 2012 9:28 am 

MANILA, Aug. 23 –- As two typhoons may still be inside the country's territory, four dams in Luzon have kept their spill gates open on Thursday as their respective reservoirs breach the normal levels.

Shiela Schnieder, hydrologist at the Philippine Atmospheric Geophysical and Astronomical Services Administration (PAGASA), said Angat and Ipo Dams in Bulacan, Binga Dam in Benguet, and San Roque Dam in Pangasinan continue to spill water.

Schnieder said Ambuklao dam in Benguet already closed its spill gates on Wednesday. As of 6 a.m. Thursday, the dam stood at 750.55 meters below the normal high level of 752 meters.

She said Ipo dam remained open its three gates by 1.1 meters with total discharged of 185.5 cubic meter per second (cms), while Angat dam opened its three gates by 1.5 meters with total of 183.2 cms.

Authorities said water from Ipo Dam was likely to affect the low-lying areas along the Angat River.

Residents living in those areas were advised to be alert for possible increase in water level downstream and to take precautionary measures.

As of 6 a.m. Thursday, the water level at Ipo Dam reached 100.37 meters, almost nearing the normal level of 100.80 meters.

Angat's water level was at 212.13 meters, already surpassing its normal level of 210 meters.

Schnieder said two gates of Binga Dam remained open at 1.5 meters with total discharged of 136 cms. As of 6 a.m., water level reached 574.46 meters, just slightly below its spilling level of 575 meters.

Binga dam’s water flow downstream to the San Roque Dam in Pangasinan also opened one gate at 0.5 meter and discharged some 301 cms.

Schnieder said San Roque Dam's water level reached 280.12 meters as of 6 a.m., slightly above its normal level of 280 meters.

Meanwhile, the La Mesa Dam in Novaliches, Quezon City was downgraded to yellow alert from red alert status as its water level has returned to normal following improved weather conditions.

She said as of 6 a.m. Wednesday, the dam's water level stood at 79.27 meters, below the spilling level of 80.15 meters.

Schnieder said the water level at Pantabangan Dam was at 211.77 meters, below the normal water level of 221 meters; Caliraya Dam in Laguna, 286.86 meters or 1.14 meters below the normal water level of 288 meters; and Magat Dam in Isabela, 191.91 meters which were above its normal water level of 190 meters. (PNA)

LDV/CLTC

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