State Report for Washington

For Washington, estimated merchantable wood volume is expected to decrease from 95.82 billion cubic-feet to 94.536 billion (a change of -1.3%), while estimated sawlog wood volume is expected to decrease from 86.074 billion cubic-feet to 81.663 billion (-5.1%). Estimated merchantable bole biomass is expected to decrease from 1.4389 billion tons to 1.3822 billion (-3.9%), while estimated stump biomass is expected to decrease from 65.878 million tons to 47.852 million (-27.4%), and estimated tops and limbs biomass is expected to increase from 242.19 million tons to 284.97 million (17.7%). Finally, estimated aboveground biomass is expected to decrease from 1.7894 billion tons to 1.7629 billion, a change of -1.5%.

Figure 1: Percent difference in volume and biomass for Washington

Species breakdown

The top ten species in Washington in terms of standing biomass are Douglas- fir, western hemlock, Pacific silver fir, western redcedar, ponderosa pine, red alder, mountain hemlock, grand fir, subalpine fir, and western larch. These species account for 90.7% of the total aboveground biomass and 91.1% of the total merchantable volume. For merchantable wood volume, the species with the smallest percent change was western redcedar 0.9%, while the largest percent change was with subalpine fir -12.3%. For total aboveground biomass, the species with the smallest percent change was western larch 2.2%, while the largest percent change was with subalpine fir 29.8%. For sawlog wood volume, the species with the smallest percent change was ponderosa pine 3.4%, while the largest percent change was with subalpine fir -18.7%. For merchantable bole biomass, the species with the smallest percent change was ponderosa pine 1.1%, while the largest percent change was with Pacific silver fir -11.5%. For stump wood and bark biomass, the species with the smallest percent change was mountain hemlock 1.6%, while the largest percent change was with western hemlock -45.5%. For top and limb biomass, the species with the smallest percent change was Douglas- fir 0.4%, while the largest percent change was with subalpine fir 262.7%.

Figure 2: Percent difference in total aboveground biomass and merchantable volume for the top ten species in Washington

Figure 3: Percent difference in component biomass and volume for the top ten species in Washington