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GEO Report No. 211
Report No. : GEO Report No. 211

Report Title : Detailed Study of the 20 August 2005 Landslide on Slope No. 11SW-D/C543 above Middle Gap Road Wanchai Gap (2007), 119 p.

Author : Fugro Scott Wilson Joint Venture

Abstract

This report presents the findings of a detailed study of a landslide (Incident No. 2005/8/0326), which occurred on 20 August 2005 on a cut slope above Middle Gap Road, Wanchai Gap. Debris from the landslide, with an estimated volume of 400 m3, was deposited on Middle Gap Road and Mount Cameron Road below, completely blocking both carriageways, and spilled over into a natural drainage line below Mount Cameron Road. No casualties were reported as a result of the failure.

The key objectives of the detailed study were to document the facts about the landslide, present relevant background information and establish the probable causes of the failure. The scope of the study comprised site reconnaissance, ground investigation and laboratory testing, desk study and engineering analysis. Recommendations for follow-up actions are reported separately.


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