The BioSAT model, version 1.0 is complete. This study involved organizing large volumes of data collected from various sources, including the U.S Census Bureau, U.S. Forest Service, railroad companies, and trucking firms (U.S. Census Bureau 2000; University of Wisconsin-Milwaukee Employment and Training Institute 2000; Perlack et al. 2005; U.S. Army Corps of Engineers 2008; U.S. Department of Agriculture Forest Service 2008; IEA Bioenergy Task 39 2009; Renewable Fuels Association 2009; Galik et al. 2009).
The BioSAT model estimates marginal cost, average cost, total cost of delivered mill and logging residues, and quantity of available mill and logging residues within 128.8 km haul distance. The BioSAT model estimates the cost and availability of woody biomass for procurement zones which may not be concentric, i.e., the shape of such zones rely on the available transportation network and biomass supply. National forests, parks, urban areas, and other restricted areas were not considered in BioSAT when estimating availability. Travel times and distances were estimated from the Microsoft© MapPoint® 2006 (http://www.microsoft.com/MapPoint/en-us/default.aspx
). Road networks in MapPoint® were a combination of the Geographic Data Technology, Inc. (GDT) and Navteq data. GDT data were used for rural areas and small to medium size cities. Navteq data were used for major metropolitan areas.
In the BioSAT model, estimates of all-live total biomass, as well as average annual growth, removals, and mortality were obtained from the Forest Inventory and Analysis Database (FIADB) version 3.0 (http://srsfia2.fs.fed.us/
). The Subregional Timber Supply (SRTS) model was used to estimate current logging residues and project future logging residues (Abt 2008). The Fuel Reduction Cost Simulator (FRCS), as modified for the Billion Ton Study, was used to estimate the costs of harvesting logging residues (Fight et al. 2006; Dykstra 2008). All records were organized at the U.S. Census Bureau 5-digit ZIP Code Tabulation Area (ZCTA) level (U.S. Census Bureau 2000). There were 25,044 ZCTAs in the 33-state study region which corresponded to 25,044 potential site locations for woody biomass-using facilities. The average area for 5-digit ZCTAs in the 33-state study region was 91.7 square miles.