MacArmour & SteelGrid

The Municipality of San Miguel, located in the northern part of Leyte Island and bordered by the San Juanico Strait, is marked by its mountainous terrain. While this geography offers natural beauty, it has also created persistent challenges for infrastructure and road safety. Many of the municipality’s roads were constructed along steep slopes and cut sections of mountains, leaving them exposed to instability. These conditions have resulted in frequent landslides, rockfalls, and slope collapses, especially during heavy rains and typhoons. Such events place motorists and nearby communities at constant risk, cause road closures, and disrupt the movement of goods and services. The recurring instability has also led to repeated maintenance and repair costs, diverting government resources that could otherwise be allocated to new development. Without an effective intervention, the problem will persist and worsen with the increasing frequency of extreme weather events. Ensuring slope stability and road safety became an urgent priority to protect lives, property, and economic activity in San Miguel.

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Rockfalls and landslides pose serious threats to infrastructure, public safety, and economic stability. The unstable steep slope adjacent to the public road exhibits signs of surficial erosion, which weakens the soil structure and increases the likelihood of rockfalls. Given the height of the slope, falling debris can gain significant momentum, making it a severe hazard for vehicles, pedestrians, and nearby properties. Furthermore, continued erosion can lead to progressive slope failure, worsening the situation over time. Without proper intervention, this problem will not only compromise public safety but also increase maintenance costs for road repairs and damage compensation.

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Holcim Philippines, the country’s leading cement manufacturer, experienced rock fall problems in their cement plant located in Matictic, Norzagaray, Bulacan. In an incident, a portion of the plant's conveyor was hit by falling rocks that resulted to delay in production and very costly repair. The initial solution was to use shotcrete with rock anchors. However, due to high cost of shotcrete materials and its installation, Holcim opted to look for an alternative solution.

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