The Forest Engineering Research Institute of Canada (FERIC) examined the level of butt damage from felling with high-speed circular saws in three winter harvesting operations in Alberta and British Columbia. The location and extent of the butt damage on each damaged stem were recorded, and the impact of the butt damage in terms of loss of sawlog volume available for lumber manufacturing was projected. Factors influencing butt damage are discussed, and recommendations to reduce wood losses are made.