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Table 2. Classes for Degree of Recent Soil Movement. <br />• SSF <br />Class Description Value <br />Stable Depth of recent deposits around 0 or 3 <br />obstacles, or in microterraces; <br />and/or depth of truncated areas, is <br />between 0 and .1 in. (0 to 2.5 mm). <br />Slight Depth of recent deposits around 5 <br />obstacles, or in microterraces; <br />and/or depth of truncated areas, is <br />between .1 and .2 in. (2.5 to 5 mm). <br />Moderate Depth of recent deposits around 8 <br />obstacles, or in microterraces; <br />and/or depth of truncated areas, is <br />between .2 and .4 in. {5 to 10 mm). <br />Critical Depth of recent deposits around 11 <br />obstacles, or in microterraces; <br />and/or depth of truncated areas, is <br />between .4 and .8 in. (10 to 20 mm). <br />Severe Depth of recent deposits around 14 <br />obstacles, or in microterraces; <br />• and/or depth of truncated areas, <br />is over .8 in. (20 mm). <br />• <br />8 <br />