Angat Dam releases water, Caliraya and La Mesa dams near spilling level due to ‘Ulysses’

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Metro Manila (CNN Philippines, November 12)— Residents in low-lying areas near the Angat, Magat, Caliraya, La Mesa, and Ipo dams have been warned by the Philippine Atmospheric, Geophysical, and Astronomical Services Administration of possible flooding due to their water release triggered by heavy rainfall from Typhoon Ulysses (international name: Vamco).

PAGASA hydrologist Richard Orendain said Angat Dam's water level is still in critical range at 213.4 meters as of 2pm. He added that the dam has already opened a gate at 1pm.

“Yung total discharge niya ay 16 cubic meter per second, medyo maliit pa ito. Dahil lagpas na po siya dun sa 210 meters na normal high-water level or spilling level,” he told CNN Philippines’ Newsroom Ngayon.

[Translation: Its total discharge is 16 cubic meter per second, it is still considered minimal. Because its water level is already beyond the 210 meters normal high water level or spilling level.]

Authorities warned nearby residents that water in Angat River is expected to rise due to the opening of gates. They have been alerted to watch out for possible floods.

The state weather bureau directed its warning to those living in low-lying areas and near Angat’s riverbanks from the towns of Norzagaray, Angat, San Rafael, Bustos, Baliuag, Pulilan, Plaridel, and Hagonoy.

On the other hand, Orendain said the Magat Dam’s water level is at 192.65 meters as of writing.

He also warned the increase in the dam's water level may affect residents in the municipalities of Ramon, San Mateo, Aurora, Cabatuan, Luna, Reina Mercedes, Burgos, Naguilian, and Gamu.

“Meron na ring pagbaha after Magat River, along Cagayan, plus yung release ng malaking volume galing Magat Dam. Talagang madadagdagan pa yung mga lugar na babahain pa,” he said.

[Translation: There's already flooding after Magat River, along Cagayan, plus the release of a large volume of water from Magat Dam. This would really increase the number of towns that might experience flooding.]

In a 5 p.m. briefing, Orendain said Magat Dam has been discharging 6,085 cubic meters per second that flows into the Magat and Cagayan rivers. He said people should expect flooding in Cagayan and Isabela provinces, especially in areas near the rivers.

Meanwhile, the Caliraya Dam in Laguna is already near its spilling level of 288 meters. PAGASA reported its water level stands at 287.72 meters as of 2 a.m.

PAGASA advised residents near Caliraya Dam to be on alert for possible flooding if dam waters spill over.

The La Mesa Dam in Quezon City is also near its spilling level of 80.15 meters, with its water level at 79.77 meters as of 4:30 a.m.

Residents near the Tullahan River are warned of possible flooding that may be aggravated with La Mesa Dam's water release once it reaches its spilling level.

Orendain also said the spilling level of Ipo Dam in Bulacan province is at 100.4 meters.

Typhoon Ulysses currently hovers over the Luzon landmass after it made three landfalls from Wednesday evening to Thursday early morning. The typhoon made its first landfall in Patnanungan, Quezon at 10:30 p.m, while the second landfall was in Burdeos, Quezon at 11:20 p.m. Ulysses made its third landfall in General Nakar, Quezon at 1:30 a.m. Thursday.