Feedstock Supply Assessment – Kittitas Biomass Utilization Project
Preliminary Briefing Paper
The recently released DNR report, Washington Forest Biomass Supply Assessment, Mar. 13, 2012, prepared by UW and TSS provides the most current resource information. The full report is available on the DNR website and is a follow-up to the 2009 Eastern WA Biomass Accessibility Study by UW for DNR; also available on the DNR website.
Associated with this latest report is the WA State Biomass Calculator available at http://wabiomass.cfr.washington.edu/.
The calculator is easy to use and allows one to calculate potentially available forest biomass under a range of harvest models and geographic areas within a range of harvest costs, delivered costs, planning periods and haul distances.
Bear in mind that forest biomass is a by product (or residual) of forest harvest operations where the primary marketable product are logs. Potential market biomass is directly proportional to harvest levels. The UW and TSS researched a range of harvest scenarios based on historical, recent and projected harvest volumes by ownership class.
The calculator can be run on a watershed (WRIA), sub-watershed (WAU), or County based geography or a larger regional geography.
The calculator is not valid for a specific project, (as we had hoped for), but it is legitimate for a “ball park” estimate and a starting point for a more detailed analysis.
For an example run I used the “average” harvest model and the “medium” harvest/processing costs, for a facility located in Ellensburg and a 2 hour haul distance.
Example Results (annual) all ownership categories:
Upper Yakima WRIA = 11,000 BDT/yr @ $40/BDT within 2 hrs.
If we add the Naches WRIA (with same criteria)
Naches WRIA = another 11,000 BDT/yr @ $40/Bdt within 2 hrs.
If we add Wenatchee WRIA
Wenatachee WRIA = another 3,000 BDT/yr @ $50/BDT within 2 hrs.
or 5,000 BDT/yr @ $50/BDT within 3 hrs.
Keep in mind this has never been done before in Central WA. All our forest generated hog fuel has gone to Wallula, Tacoma, or Lewiston and has been subsidized by round wood or a spec. chip.
To do a project specific supply study will require we look at the future harvest plans by ownership category, location, accessibility, logging system, vegetation type and then project residuals on the landing. We can then come closer to availability. Once we know planned sale volume we can use BDT per MBF values on p.98 of the report: Eastside DF = .81 BDT/MBF; eastside mixed conifer = .69 BDT/MBF.
Also, keep in mind we will have Cle Elum and Dryden transfer station woody biomass that will reduce the average delivered cost.