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Cross, Jason C.; Turnblom, Eric C.; Ettl, Gregory J. 2013. Biomass production on the Olympic and Kitsap Peninsulas, Washington: updated logging residue ratios, slash pile volume-to-weight ratios, and supply curves for selected locations. Gen. Tech. Rep. PNW-GTR-872. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 30 p. Biomass residue produced by timber harvest operations is estimated for the Olympic and Kitsap Peninsulas, Washington. Scattered residues were sampled in 53 harvest units and piled residues were completely enumerated in 55 harvest units. Production is based on 2008 and 2009 data and is stratified by forest location, ownership type, harvest intensity, and harvest method. An additional sampling was taken to ascertain the mass of wood present in a pile of biomass: 20 piles of biomass were measured for gross volume, processed into hog fuel, and remeasured for volume; five samples were drawn from each pile and examined for volume, green mass, and bone-dry mass. An equation relating mass of wood in a pile to the gross biomass volume is derived. Finally, the availability and average delivered cost per ton of biomass is calculated for five delivery centers on the Olympic Peninsula.

general technical report, pacific northwest research station, usda forest service

Biomass production on the Olympic and Kitsap Peninsulas, Washington: updated logging residue ratios, slash pile volume-to-weight ratios, and supply curves for selected locations