GEOLOGICAL SOCIETY OF THE PHILIPPINES
Geological and engineering geological investigation and slope stability analysis of the September 13, 1999 mass movement, Km. 225.4,
Kennon Road, Baguio City, Philippines
Tabassam Raza and Francisco A. Jimenez, Jr.
Engineering Geology Project Group
University of the Philippines, Diliman, Quezon City
Kennon road, which was constructed along the mountain slopes, is more often than not, vulnerable to mass movement. The risks involved in slope failure along this road vary from a mere road blockage to, worst, deaths. This paper will present the results of slope stability analysis at approximately Km. 225.4 in Kennon Road, which is the site of September 13, 1999 mass movement that killed 17 people. The road is 30km long and constructed along mountain slopes. It serves as an alternate road from the provincial highway in Rosario, La Union to Baguio City. Mass movements in the different segments of the Kennon Road occurred periodically, most commonly from July to October ― the months with the highest recorded rainfall. Many of these mass movements have been the reason for closing the Kennon Road temporarily to motorists. Except for the mass movements related to the July 16, 1990 Luzon earthquake, there was no recent mass movement along the Kennon Road as tragic as the one that occurred on September 13, 1999.
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