Programme: Harvesting & Logistics Log Transportation in the Age of Automation Two Stage Logging

Abstract and Figures

Two-stage logging is a term that describes an intermediate extraction system between the primary extraction system pulling the tree stems from the cutover to a landing and the sorting, storage and loading out of the logs to the customer. It adds complexity in terms of additional equipment requirements as well as another step in the log supply chain from harvesting stems to loading out logs onto on-highway trucks for transportation to their destination. And yet if well planned and managed, two-stage logging provides the opportunity for environmental and financial benefits. While there are many equipment variations of two-stage logging, this report focuses on using trucks to either move stems from the primary extraction landing for processing at a central skid, or moving processed logs for sorting, fleeting and loading out at a central yard. Two-stage logging offers the advantages of reducing congestion on the primary extraction landing and reduced environmental and financial cost of roading and landing infrastructure, particularly for steep land harvesting. This report highlights eleven different existing operations that were studied. The systems are described, and where possible the report includes some indicative extraction times, productivity and cost for the two-staging operation. While some operations appeared to be very well integrated and achieved good results for the contractor and forestry companies, each variation has its costs and implementation challenges.