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The field crew in northern California, running a Standard Penetration Test (ASTM D1586) and installing piezometers to monitor groundwater on a steep slope.

1)  Adams, W.C., Prellwitz, R.W. and Koler, T.E., 2007, Low-Technology Approach to Evaluating Slope Stability in Forested Uplands, In: First North American Landslide Conference, Vail, CO, pp. 569 - 577.


Williamson Drive Probe soil sampling and blow counts for comparison with the adjacent SPT readings.

2)  Parson, D.W., Prellwitz, R.W., Koler, T.E. and Cloyd, J.C., 2007, Scale Problems in Landslide Risk Management - An Update on US Forest Service Three Level System, In: First North American Landslide Conference, Vail, CO, pp. 149-161.


3)  Koler, T.E., Loomis, J.B. and Bergstrom, J.C., 2007, First Steps in Estimating the Total Economic Value for Landslide Hazard Mitigation on National Forest System Lands, In: First North American Landslide Risk Conference, Vail, CO, pp. 1215-1224.


4)  Adams, W.C., Prellwitz , R.W. and Koler, T.E., 2003, An Economical Approach to Supplement Investigations of Soil Relative Density in Forest Engineering Geology, SARA 2003, 12th Panamerican Conference on Soil Mechanics and Geotechnical Engineering/39th U.S. Rock Mechanics Symposium, Massachusetts Institute of Technology, Boston, MA, pp. 369 - 374.


Mr. Prellwitz's steady hand is needed to get consistant SPT results in this remote area near Lake Tahoe.

5)  Adams, W.C., Findley, D.P. and Lowell, S, 1996, Peters Road Landslide.  Presented at the 47th Highway Geology Symposium, Wyoming Department of Transportaion and Wyoming Geological Survey.


6)  Adams, W.C. and Breckenridge, R.M., 1991, Landslides in Idaho, Idaho Geological Survey, SMG-1, map scale 1:500,000.