Logging residues are the portions of harvested trees not utilized and left in the woods after operations. Logging residue data is available online at (http://www.fia.fs.fed.us).
For 2007, about 4.51 billion ft3 (63.04 million dry tons) of logging residues were generated from all sources, with about 44% of the residues from softwood tree species and the remainder from hardwood species. About 8% of the material came from national forests and other public lands.
Few studies attempt to estimate future logging residues quantities or quantities available as a function of price, although costs are thought to be similar to pulpwood harvest and transport costs.