Weldwood of Canada Limited's William Lake Operations and the B.C. Ministry of Forests and Lands, Cariboo Forest Region, agreed to a field trial on two sites (CP 122 and CP 140) to determine whether small crawler tractors could log steep slopes in the Central interior and satisfy economic and environmental constraints. FERIC monitored the logging trials, measuring log production and soil disturbance for small crawler-tractor and cable-yarding systems from June 1984 to march 1985. For additional comparison, a rubber-tired-skidder operation was also monitored for a six-week period in the summer.