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<br />SAWTIMBER SUPPLY <br /> <br />First, die RCCIlt teD ~ (FY '82 - IT' 91) overview of the sawtimber supply on the Rio Grande timbershed <br />and from the Rio GraIIde forest is provided. This is followed with detail explaining the program structure <br />showill& sales volumes by species compOsition and other ~teristics. Eadr draft beluw refers to sales <br />or WJlMmes thlll sold (were purdrased "nd operllled) unless otherwise indiclIled. SimIlarly, volume will <br />refer t/) ltIWIimber only, unless otherwise denoted, <br /> <br />I. <br /> <br />TEN YEAR OVERVEW <br /> <br />i' <br /> <br />The following charts provide an overview of tile sawtimber sales vohunes for the Rio Grande and its <br />1imbc:rsbed. These charts are based 011 data taken from the Forest Service 2400-17 records, 10 the volumes <br />are as appraised by the US. Forest Service. The appraisal data reported here accurately refIeeted the <br />Forest Service forms. 'Jbcy are estimates made of the actua1 sale volume before barYesl and they often <br />clifi'er from the actua1 barYesl (log scale). If sales arc consistently appraised too high or too low in volume, <br />then die da1a recorded in the timber sale records can introduce bias in any analysis that uses those records. <br />According to Forest Serviee oJJic14ls. and confirmed bylnthlstry representll1ives, timber lilies on the <br />Rio Grande HlI1ional Forest IIiNe IIot been "cuning ollt"for several years. This _ns thlll tl/'praisal <br />Wllllmesllillle been higher 'hall log ,CIIle volumes by dOllt 20 perCOlL Simply put, appraised volumes, <br />as recorded 011 the 2400-17'5 have been higher than actual. This will be an important COIlSidention in the <br />interpretation of the results of this study. <br /> <br />In atldition, primary proccs:.ors typically rely on an extent of "over-run." Over-run is the clifi'erence . <br />bctwccn log scale and lumber tally. Most processors can produce ~ 30 percent over-run, meaning <br />that their lumber tally will be at least 30 percent higher than the log tally. Over-run varies substantial1y <br />from mi1110 mill (and by barYesl practice) and over-run percentages of 60 to 100 percent are common. <br />While over-run is impOrtant background, it will not be revisited in this study. <br /> <br />The following chart shows the sawtimber volume sold from the Rio Grande as compared with its <br />timbersbcd. In all charts addressing the timbershcd, timbershcd volumes include Rio Grande volume. <br /> <br />\ <br /> <br />e <br /> <br />( · r'; 2 ~ 3' "'I <br />'" ;) I <br /> <br />~ <br /> <br />4 <br /> <br />~ <br />