Residents’ fear heightens as San Roque Dam releases water

September 17, 2018 at 10:06 am Leave a comment


By Virgilio Sar. Maganes

ROSALES- Residents of the towns along the Agno River feared  a Typhoon Pepeng-like scenario that caused massive flooding in October 2009 when the San Roque Power Corporation announced that it will release water from the dam’s reservoir at 5:00 in the afternoon of September 15.

The towns along the Agno River are San Manuel, San Nicolas, Tayug, Asingan, Sta. Maria, Rosales, Villasis, Sto. Tomas, Alcala, Bautista, Bayambang, Mangatarem, Urbiztondo, Aguilar, Bugallon, Lingayen, Labrador and part of San Carlos City.

Prior to the initial release of water from the dam, reports from National Power Corporation (NPC) stated that San Roque Dam’s reservoir has a water elevation of 278.31 meters above sea level (masl), with a total water inflow from Ambuklao and Binga Dams of 4,730 cubic meters per second (cms).

At 5:00 in the afternoon of September 15, SRPC opened Gates 5 and 6 of the dam releasing water at one meter high each to Agno River with a total outflow of 582 cms. Water inflow from the Ambuklao and Binga Dams was at 6,130 cms that placed the dam’s elevation to 282.55 masl or 2.55 meters above its normal high water level.

With the continuous inflow of water volume from the Ambuklao and Binga Dams, the water elevation continued to rise at 284.79 masl at 7:00 in the evening, 285.82 masl at 8:00 in the evening, and 287.69 masl at 11:00 in the evening when the dam opened its four gates with Gates 3 and 4 releasing four meters high and Gates 5 and 6 at two meters high each.

Total water inflow was recorded at 3, 916 cms with a total outflow of 2,427 cms.

Before the opening of the four gates, residents living along the Agno River dikes were evacuated to evacuation centers in their towns for their safety.

The preempted evacuation caused panic among the residents along the Agno River when rumors circulated that portions of the dikes in Rosales, Balungao, and Villasis have been breached.

Mely Perez of San Blas village in Villasis started to pack their family belongings and decided to leave their house.

Nory Rayray of Station village in Rosales said her family did not sleep the whole night waiting for the flood and put their things in safe places.  “ Sana naman pag ganitong may bagyo, huwag ng hintayin pa ng dam (management) na tumaas ang tubig. Nagpakawala na sana sila ng maaga,” she said.

Perez and Rayray were among the residents who feared the coming in of flood as they have been traumatized of the floods in 2009.

Many residents took refuge at the TPLEX bridges in Rosales and Villasis.

Rumors of flood and the release of heavy volume of water from the dam have been dampened when at 5:00 in the morning of September 16, NPC reported that the dam’s elevation at 287.29 masl will not reach a critical level with an inflow of 1,541 cms and outflow of 1,690 cms. Gates 3 and 4 were opened at four meters high each.

Meanwhile, the Pangasinan Provincial Police Office (PPPO) through its situationer report at 12:00 midnight of September 15 stated that Typhoon Ompong has not left any casualty in the province as it leaves northern Luzon at 10:00 in the evening of September 15.

It also reported that there were 91 villages that were flooded in the towns of Manaoag, Binmaley, Bautista,San Fabian, Bani, Umingan,Mabini, Bugallon, San Jacinto, Laoac Lingayen, Alcala, Mangaldan, Urdaneta City, Alaminos City, and Dagupan City.

A total of 6,805 families or 27,626 persons have also been evacuated to the towns and cities evacuation centers.

Entry filed under: News.

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