There are nine harvest options available in the calculator. This tab lets you select from a pick-list which harvest model to use in your calculations.
Each harvest model targeted a specific harvested board foot volume for each owner classes in each time period. The Average, Conservative, and
Aggressive Harvest models are based on projecting forward historical harvest data from
DNR harvest reports. The six forest health models use the Average Harvest model for all non-Federal owners, and increased harvest targets for Federal owners.
The graph shows harvest volume by owner class across time under the different harvest scenarios.
The Conservative Harvest model is based on projecting forward historical harvest data from DNR harvest reports. This model produces harvest levels slightly above 2 billion board feet (BBF) annually from 2015 through 2030. This model constrains merchantable timber production to levels observed in today's low markets, due mainly to the most current economic recession.
Select a planning period to calculate biomass. Planning periods are in 5 year increments. The 2010 planning period is based on historical trends. The 2015-2030 periods are projections
based on harvest levels described on the Harvest Model tab.
Biomass calculations can be run for different geographic areas. This tab lets you select the area for which your calculation will run.
You first select the type of area in which you are interested using the radio buttons, then select a specific location in the pick-list.
You must pick a specific location from the pick-list.
If you select State, County, Stumpage Value Area, Timbershed, or WRIA, the total Market Biomass within that unit will be calculated.
Competition takes place between facilities selected on the Facilities tab, with the biomass going to the facility that maximizes residual value.
If you select a facility, the total Market Biomass available to that facility will be calculated. Competition with other facilities is
determined by the facilities selected on the Facilities tab.
Biomass calculations can be limited to specific parts of the state. For example if Kittitas County were selected only biomass produced in Kittitas County would be
summarized in the results. The selection of a specific geographic area does not limit which facilities the produced biomass can be sold to. Kittitas County biomass could be sold to a
facility in Grays Harbor County if the facility in Hoquiam, for example, were selected on the facilities tab.
If a facility is selected rather than a geographic area then all biomass that is economically deliverable to the facility will be reported in the results.
The geographic area when selecting a facility could be considered a "fuelshed" for that facility. Competition for the biomass in the fuelshed is determined by the facilities
selected on the facilities tab. If no additional facilities are selected on the facilities tab then no competition between facilities will be considered. If other facilities are
selected on the facilities tab then the calculator will "sell" the biomass to the facility that maximizes residual value to the landowner. If there are multiple facilities
that have equivalent residual value to the landowner then the calculator will randomly pick one of those facilities.
Select a specific location for which to calculate biomass availability. Only a single geographic area can be selected at a time. If more than one area is desired you can select a
larger area and then select the appropriate Reporting field to report results for multiple areas. For example if you wanted to report biomass availability in both WRIA 48 & 49 then
select "County" for Type of area, then select Okanogan. Then on the Options tab under Reporting fields select Watershed (WRIA) as a reporting field. This will produce a table for
all the WRIAs in Okanogan County including WRIAs 48 & 49.
Potential biomass supply is determined by analyzing the competition between facilities. Supply to a facility assumes land owners
would sell their biomass to the facility that maximizes their residual value. If more than one facility has equal residual value to
the landowner then a single facility is randomly chosen.
Existing facilities are those that are currently buying biomass (although not necessarily timber harvest residuals). Proposed facilities are those that have been suggested, evaluated,
or are currently in the planning stages. Hypothetical facilities are those that were existing and then closed or were identified by the project team or through workshops held
early in the project.
At least one facility must be selected for the analysis. If a single facility is selected then no competition is considered.
If a facility is selected on the Geography tab it will be greyed out below as it must be included in the analysis and cannot be unselected.
Use the Quick-pick groups to select existing, proposed, hypothetical or all facilities rather than selecting facilities one at a time. Select clear to unselect all facilities.
Select facilities to include in the analysis. At least one facility must be selected for the analysis. If a single facility is selected then no competition is considered.
If multiple facilities are selected the competition between facilities is determined by maximizing residual value to individual landowners.
This tab lets you select the Harvest Cost model and the Price facilities pay for biomass.
There are three or four costs associated with harvesting, processing, loading and hauling biomass:
Three cost models are available in the Calculator:
Prices for biomass can range from $27 to $100 per ton. Each Cost Model has a different minimum price. Biomass cannot be economically delivered
to any facility when the price is below the minimum value for a cost model.
Biomass is only removed from the site if the price multiplied by the tons of Market Biomass is greater than the cost of getting that Market
Biomass to a facility. The model takes into account the minimum tons a chip van would need to carry in order to break even on a trip to a facility,
and will only take trips with loads above this threshold. The model will take as many trips as are needed to get all of the economically available biomass off site.
Select a cost model for harvesting, grinding, loading, trucking and unloading biomass. Note that harvest costs for biomass are assumed to be $0 for all commercial timber
harvests as the collection of biomass at the roadside is a side-effect of the timber harvest. For forest health treatments the harvest cost varies from $30 to $60 per ton.
Select a biomass price. This is the delivered price that biomass purchasers pay at the facility. For different combinations of harvest runs and costs the lowest price that
delivers biomass to at least one facility is different.
Note that higher biomass prices increase the run-time of the calculator so please be patient
This tab lets you set the final calculator options.
Harvest levels were modeled for the years ranging from 2010 to 2030 in five year increments. You can choose the planning period in which you are
interested from the Planning Period pick-list.
Truck haul times were calculated for all models in 10 minute increments out to four hours. By default the calculator uses the maximum four
hour haul time. If you would like to restrict the amount of time trucks are allowed to travel, you may choose a shorter haul time from the Biomass Trucking Restrictions pick-list.
Your results table can be reported back in various combinations; for example the amount of biomass for a facility coming from each county.
The Reporting Fields check boxes allow you to choose how your results are summarized.
If you check the Facility box, the results indicate biomass from your selected Geographic area that goes to each facility
The other check boxes indicate biomass from your selected Geographic area within each County, Watershed, etc.
Select a maximum haul time to restrict the amount of time a truck may travel to deliver biomass to a facility. This is one-way haul time.
Selecting Reporting fields allows for more granular analysis of results. For example if you are interested in biomass in Kittitas County and want to know which existing facilities
are economically viable to sell biomass to select County-Kittitas on the Geography tab and select Facility under Reporting fields. If a geographic area or facility is selected on the
Geography tab the corresponding reporting field option will be greyed out as it must be selected to report results.
To display ID numbers for Geographic areas and facilities in the results table select ID Numbers.
To display names for Geographic areas and facilities select Names.
This tab displays your results when you click the Run button.
The results table, depending on the options you selected, may include any of the following columns: CountyID, FacilityID, OwnerClass, SVAID, TimbershedID,
or WRIANumber. These are the ID numbers for the Counties, Facilities, Owner Classes, Stumpage Value Areas, Timbersheds, and WRIAs respectively.
The Download Lookup Tables link in the upper right corner of the tab will take you to a page where you can view and download tables for what these ID numbers mean.
If the No biomass is available using the current geographic, harvest and economic assumptions warning appears then the combination of
harvest, geography, facilities, costs and prices does not produce any economically viable biomass. Most often this is associated with too high of a cost or too low of a
price. However, if Spokane County were selected as the Geography and the facility in Hoquiam were chosen then no price evaluated would yield market biomass as both
the cost and travel time are outside of the analysis maximums.