THE AUTHORS 



WILLIAM S. HARTS OG is a Research Engineer, Forest Engineering 

 Research, located at the Intermountain Station's Forestry- 

 Sciences Laboratory in Bozeman, Montana. He has been 

 involved with logging, forest roads, and erosion on 

 various research assignments since 1969. 



JAMES CASS received a bachelor's degree in psychology in 1973 and an 

 M.S. in mathematics (statistics option) in 1975, both from Mont- 

 ana State University. While doing graduate work at Montana State, 

 he did the statistical analysis for this study. He is presently 

 employed as a statistician with the Montana Department of Rev- 

 enue in Helena, Montana. 



