PROJECTED TIMBER SUPPLIES 1970 LEVEL OF MANAGEMENT 



73 



Table 61. — Sawtimber removals, net growth, mortality, supplies of roundwood products, and inventories in 

 the Rocky Mountains, 1952, 1962, 1970, with projections {1970 level of management) l to 2020 



[Million board feet] 





1952 



1962 



1970 



Projections 



Item 



1980 



1990 



2000 



2020 



SOFTWOODS 



Removals from sawtimber: 

 Roundwood products 



2,940 



177 



60 



3,961 

 240 



78 



4,948 



311 



97 



5,274 

 275 

 605 



5,349 

 261 

 633 



5,625 

 259 



647 



5, 222 



Logging residues. _ _____ 



237 



Other removals _ _ _ _ _ _ 



660 







Total _. 



3, 177 



4,279 



5,356 



6, 154 



6, 243 



6,531 



6, 119 





Net growth. _ __ _ 



4, 153 

 2,470 



4,523 

 2,517 



4,936 

 2,546 



5,646 

 2, 214 



6,034 

 2, 185 



6, 178 

 2, 168 



6, 328 



Mortality ____ 



2, 150 







Roundwood supplies: 



From sawtimber _ 



2,940 

 186 



3,961 

 228 



4, 948 

 326 



5,274 

 311 



5,349 

 300 



5,625 

 289 



5, 222 



From other sources 2 



289 







Total __. __ _ _ 



3, 126 



4, 189 



5,274 



5,585 



5,649 



5,914 



5, 511 







Inventory of sawtimber _ _ 



369, 173 



381, 344 



355, 107 



345, 984 



342, 424 



340, 949 



339, 635 







HARDWOODS 



Removals from sawtimber: 

 Roundwood products 



14 

 1 

 1 



18 



1 

 1 



11 

 1 

 1 



106 



4 



28 



146 



5 



30 



194 



6 



32 



189 



Logging residues. _ 



6 



Other removals __ _____ 



32 







Total ... 



16 



20 



13 



138 



181 



232 



227 







Net growth _ _ _. _ _ 



98 

 71 



107 

 73 



145 

 102 



187 

 63 



209 

 63 



212 

 68 



210 



Mortality. . . . 



63 







Roundwood supplies: 



From sawtimber. . ... 



14 

 1 



18 

 1 



11 

 2 



106 

 2 



146 

 2 



194 

 2 



189 



From other sources 2 ._ . 



2 







Total ... 



15 



19 



13 



108 



148 



196 



191 







Inventory of sawtimber 



8,904 



9,580 



9,302 



9,955 



10, 310 



10, 386 



9, 970 







1 Plus other area and harvesting assumptions specified 

 in this chapter. 



2 Includes roundwood products from rough and rotten 

 trees, dead trees, and trees on noncommercial and non- 



tion that National Forest removals could rise to 

 equal the level of allowable cut estimated in 1970. 



It is recognized that forest acreages could vary 

 from assumptions as a result of changing land 

 management objectives. Allowable cut levels 

 could be revised downward as a result of increases 

 in nontimber uses. And economic analyses indi- 

 cate that actual timber harvests could equal 

 allowable cuts only with significantly higher 

 stumpage price levels than existed in 1970. 



Projections also indicate that substantial 

 volumes of hardwoods, particularly aspen, could 

 be made available under the assumptions of these 



forest land. 



Note: Estimates are for trend levels and consequently 

 may differ from actual figures for the specified years. 



base projections, but substantial changes in hard- 

 wood values, plant capacity, and markets would 

 be necessary before expanded use becomes feasible. 



Supplies of Roundwood 



Harvests of timber products for use by the tim- 

 ber industries made up an estimated 87 percent 

 of all softwood growing stock removals in 1970 

 (tables 60 and 62). Approximately 11 percent of 

 the total volume removed from growing stock was 

 left in the woods as logging residues. An estimated 

 2 percent — which probably was an underestimate 

 of average annual withdrawals — represented re- 



