PERTANIKA JOURNAL OF TROPICAL AGRICULTURAL SCIENCE

Rockfall is a type of landslide that involves a single rock movement. The impact of rockfall hazard can be reduced by predicting rockfall's motion and mitigate any negative outcome based on the predicted results. Gunung Batu Lembang is a rockfall prone area due to its steep contours compounded by weathering of andesite rocks. Gunung Batu is located in the active fault Lembang. Rockfall runout can be predicted using Colorado Rockfall Simulation Program 3 Dimension (CRSP - 3D) software. Results of modelling and simulation using the CRSP - 3D show that potential rockfall at between 73,124 meters and 86,565 metre, and all the rockfall at the toe of slope can be potentially hazardous. Based on predicted result, the first rockfall prone area is along the road and which necessitates the building of protective levee along the road.