. Mass soil movements in the Andrews Experimental Forest. Earth movements Oregon; Soil mechanics Oregon. Figure roadfill failure caused by blockage of road drainage ditch. 5. Road removed stream. or damaged by In three cases, culverts carry- ing perennial or intermittent streams failed either because of inadequate size or, more probably, because they became blocked by debris (fig. 7). As a result, roads were completely washed out or were severely damaged. Figure which blocked the culvert and caused several feet of material to be deposited on the road surface. (Road,
. Mass soil movements in the Andrews Experimental Forest. Earth movements Oregon; Soil mechanics Oregon. Figure roadfill failure caused by blockage of road drainage ditch. 5. Road removed stream. or damaged by In three cases, culverts carry- ing perennial or intermittent streams failed either because of inadequate size or, more probably, because they became blocked by debris (fig. 7). As a result, roads were completely washed out or were severely damaged. Figure which blocked the culvert and caused several feet of material to be deposited on the road surface. (Road, in foreground, has been repaired.). 7. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Dyrness, C. T. cn; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ). [Portland, Or. ] : Pacific Northwest Forest and Range Experiment Station, Forest Service, U. S. Dept. of Agriculture
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