Pacawit artificial dam poses danger on downstream residents - MGB
Pinukpuk, Kalinga (10 September) -- A team from the Mines and Geosciences Bureau of the Department of Environment and Natural Resources, Cordillera Administrative Region (MGB-DENR-CAR) warned residents downstream the Mananig river of the danger pose by an artificial dam located at Pacawit this municipality.
Supervising Geologist Benigno Cesar Espejo reported that the assessment conducted recently was to establish the geological hazard condition of the site in order to come up with immediate recommendations, especially planning risk management to reduce its effect on residents of the nearby and low lying areas.
Based from the findings and observations, the present landslide area is still progressing. The debris materials noted along the river serves as toe support of the slide deposit. "This toe support will later be washed or scoured by the river water which will cause the further down slope movement of debris deposits and will later result to another cycle of damming then scouring", Espejo reported.
He said that the debris deposits are generally super saturated with water due to the presence of a creek that was buried by the landslide. "It is concluded that more of the volume of the debris deposits will still move further down slope until the ideal angle of repose is attained", Espejo explained.
There is no access to the site for clearing by mechanized equipments. He said that the safest is just to wait until the temporary dam is naturally breach by the running water as manual clearing is ruled out as an option considering the danger of working below due to the downslope movement of debris deposits.
Residents downstream were warned during the onslaught of typhoons to relocate on safer grounds until the dam drains. The Municipal Disaster Coordinating Council (MDCC) of Pinukpuk kept a close watch on the declared'danger zone'. (PIA-Kalinga) [top]