Report No. : GEO Report No. 151

Report Title : Detailed Study of the 9 June 2001 Rockfall Incident at Slope No. 11NW-A/C58 at Castle Peak Road below Wah Yuen Chuen (2004), 74 p.

Author : Maunsell Geotechnical Services Ltd.


This report presents the findings of a detailed study of a rockfall incident (GEO Incident No. MW2001/06/007) which occurred on the evening of 9 June 2001 on a soil and rock cut slope adjacent to Castle Peak Road below Wah Yuen Chuen, Kwai Chung. The rock debris hit a Post Office van that was travelling on the inside lane of the southeast bound carriageway of Castle Peak Road. A rock fragment punched through the windscreen of the van. The driver became unconscious and lost control of the van, which continued along the road and crashed into the toe of the slope before coming to a halt. As a result, the driver and the only other passenger, who was also in the front seat, were injured.

The key objectives of the detailed study were to document the facts about the incident, present relevant background information and establish the probable causes of the failure. Recommendations for follow-up actions are reported separately.

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