| Summary: | In 1991 the Forest Engineering Research Institute of Canada and the Faculty of Forestry at the
University of British Columbia initiated a four year cooperative project for the Canadian Forest
Service to estimate harvesting system productivity and costs for clearcutting second-growth coastal
sites of British Columbia. The overall objectives were to develop productivity and cost prediction
models for common harvesting systems operating in second-growth stands and to design a
framework for a model to select the best harvesting system for a given area based on costs.
Two harvesting operations in coastal second-growth forests on Vancouver Island were monitored.
This included mechanical and manual felling, and primary timber extraction with combinations of
modified hydraulic log loaders (excavator-forwarders) and long-boom loaders (super-snorkels).
Studies measured machine productivities and identified factors that influenced machine performance.
Model framework design incorporated production functions derived from time studies, optimal
placement of roads and landings, and machine and operating costing methods. === Forestry, Faculty of === Graduate
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