PROJECTED TIMBER SUPPLIES 1970 LEVEL OF MANAGEMENT 



71 



T\ble 58 —Inventory of growing stock per acre in the North, by owner class, 1952, 1962, and 1970, with 



projections to 2020 





[Cubic feet] 













Owner class and species group 



1952 



1962 



1970 



Projections 



1980 



1990 



2000 



2020 



National Forests: 



189 

 447 



258 

 598 



296 

 704 



363 

 871 



403 

 950 



417 

 974 



417 

 974 







636 



856 



1,000 



1,234 



1,353 



1,391 



1,391 



Other public : 



150 

 402 



193 



545 



226 



648 



274 

 814 



305 

 906 



316 

 936 



316 

 936 







552 



738 



874 



1,088 



1,211 



1,252 



1,252 



Forest industry : 



440 

 494 



544 

 590 



640 

 571 



749 

 643 



805 

 686 



823 

 701 



824 

 701 









934 



1, 134 



1,211 



1,392 



1,491 



192 

 850 



1,524 



1,525 



Farm and miscellaneous private: 



132 

 499 



151 

 580 



155 

 664 



179 



778 



196 



875 



196 



875 









631 



731 



819 



957 



1,042 



1,071 



1,071 



All owners: 



163 

 483 



194 



578 



220 

 655 



260 

 774 



284 

 845 



294 

 869 



300 

 867 









646 



772 



875 



1,034 



1, 129 



1, 163 



1, 167 







1 





T\ble 59 —Area of commercial timberland in the Rocky Mountains, by owner class, 1952, 1962, and 1970, 



with projections to 2020 



[Millions acres] 



Owner class 



National Forest 



Other public 



Forest industry 



Farm and miscellaneous private. 



1952 



41. 9 

 7.2 

 2.2 



12. 5 



1962 



Total. 



63.9 



42. 7 

 7.2 

 2.2 



12.5 



1970 



» 39.8 



7.2 



2. 2 



12.4 



Projections 



1980 



64. 6 



61.6 



39.4 

 7. 1 

 2.2 



11.8 



60.5 



1990 



39.0 

 7.0 

 2.2 



11. 1 



59.3 



2000 



38.6 

 7.0 

 2.2 



10.5 



58.3 



2020 



37.8 

 6.8 

 2.2 

 9.2 



56.0 



« Includes 5 million acres of National Forest land not considered in projecting timber supplies > These indue k , small 

 patches and stringers of productive forest land isolated from markets, areas too unstable to harvest with current teen 

 nology, and lands where nontimber uses predominate. 



Timber Removals 



Because of accessibility problems and low 

 stumpage values, timber harvests in the Rocky 

 Mountain area for many years were limited to 

 large, high-quality timber such as white pine 

 and ponderosa pine. A large portion of the tim- 



ber inventory was not economically available 

 until after World War II, when improved trans- 

 portation in the region and growing timber 

 markets led to increased values for diverse species 

 and smaller sized trees. 



The extent of recent timber development is 

 indicated by the substantial rise in timber re- 



