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• <br />Veloelty Description Velocity Typical <br />Class (mm/see) Velocity <br />7 Extremely <br /> Rapid <br /> 703 <br />5 <br />M <br /> x <br />sec <br />5 <br />6 Very Rapid <br /> 10~ 3 m/min <br />S <br /> x <br />5 Rapid <br /> /F <br />'t 1 <br />8 <br /> m <br />v <br />. <br />Sx10 <br />4 Moderate - <br /> 5x70'3 13 m/morrth <br />3 Slow <br /> ear <br />5x10'5 7 <br />6 m/ <br /> . <br />y <br />2 Very Slow <br /> ear <br />S <br />10'~ 76 <br />/ <br /> x <br />mm <br />y <br />1 Extremely <br /> Slow <br />.Table 3-6 <br />Examples of LaFldslide Veloelty and Damage <br />Table 3-5 <br />Definition of Probable DesVuctive Signifimnce of Landslides of Different <br />Veloelty Classes <br />LANQSIIOE <br />V¢pcrtx <br />Cuss PROBABLE DESrRUCr[vE SIGNIF[GWCE <br />7 Catastrophe of major violence; buildings desatyed 6y <br /> impact oFdisplaced material: many deaths; escape unlikely <br />6 Some lives lost; velocity too great to permit all persons ro <br /> escape <br />5 Escape evacuation possible; structures, possessions, and <br /> equipment destroyed <br />4 Some temporary and inseruidve structtres can be <br /> temporarily maintained <br />3 Remedial consttucrian ~ be undertaken doting <br /> movement; insensitive stcuctures can be maintained with <br /> ftequeru toaintenaace wodt if mml movement is not large <br /> during a particular acceleration phase <br />l Some permanent structures undamaged by movement <br />1 - Imperceptible without in<m,m....ts; constructiotr possible <br /> with precautions <br />LAN0.4.IDB LANGSLIDE ... FstuuTID <br />V¢ocmr NAME oa LnrrDSimE <br />CLASS LOG4T7ON ~ - Rl}FRkNCE ~ Vtlocm DAMAGE . <br />7 Elm Heim (1932) 70 m/sec <br />7 Goklau Heim (1932) 70 m/sec <br />7 Jupille Bishop (1973) 31 m/sec <br />7 Frank McConnell and Brock (1904) 28 m/sec <br />7 Vaiont Muellei (1964) 25 m/sec <br />7 Ikura Engineering News Retard (1971) 18 m/sec <br />7 St Jean Vianney Tavenas et aL (1971) 7 m/sec <br />6 Aberfarr Bishop (1973) 45 m/sec <br />5 Panama Canal -. Cans (1924) 1 m/min . <br />4 Handlova 7anrba and Mend (1969) 6 mlday <br />3 Schuders Huder (1976) . 10 mFjeaz <br />3 Wiad Mountain Palmer (1977) 10 m/yeaz <br />2 Lugnez Huder (1976) 037 mlyear <br />• 2 little Stinky Thomson and Haylep (1975) 0.25 m/yeaz <br />2 Klosters Haefeli (1965) 0.02 m/year <br />2 Ft. Peck Spillway Wilson (1970) 0.02 m/year <br />115 deaths <br />457 deaths <br />11 deaths, houses drsaoyed <br />70 deaths <br />1,900 deaths b9 indirect damage <br />15 deaths, equipment demoyed <br />14 deaths, structures desaoyed <br />144 deadrs, some buildings <br />~~ <br />Equipment trapped, people <br />.escaped <br />150 houses destroyed, complete <br />evaaation <br />Road maintained with difficulty <br />Road and railway require frequent <br />maintenance, buildings adjusted <br />periodically <br />Six villages on slope undisturbed <br />Bridge protected by slip joint <br />Tuturel maintained, bridge <br />protected by slip joint <br />Movements unacceptable, <br />slope Battened <br />Source: Landslides Investigation and Mitigation <br />Special Report 247, Transportation Research Board <br />National Research Council <br />