rial on harvest sites. These estimates exclude stumps 

 and roots, which are potentially an economic resource 

 in certain areas. 



Unsalvaged mortality from suppression, insects, 

 disease, fire, and other destructive agents totaled an 

 additional 4 billion cubic feet. This included 1 billion 

 cubic feet of unsalvaged mortality on National 

 Forests, most of which occurred in the West. 



As a result of accumulated mortality, there was 

 about 14 billion cubic feet of salvable dead timber, 

 largely in western softwoods, in 1977. The majority of 

 this dead timber was on National Forests. As has 

 been indicated, nearly all of the mortality on the 

 National Forests occurred in areas that lack roads 

 and are inaccessible for trucks and tractors. The dead 

 trees are also usually scattered over large acreages. 



In addition to salvable dead, the timber inventory 

 includes 23.5 billion cubic feet of rotten trees and 43.3 

 billion cubic feet of rough trees. The rough and rotten 

 inventory is mainly composed of hardwood trees. 

 These rough and rotten trees are also scattered over 

 large acreages and potential uses are largely limited to 

 those where quality is not an important consideration. 



Unused wood residuals at primary manufacturing 

 plants in the United States amounted to about 0.5 

 billion cubic feet in 1976 — 4 percent of the wood 



input (fig. 6.8). The decline was mainly due to a large 

 rise in use of sawmill and veneer mill residuals in pulp 

 and particleboard production. Increased use of wood 

 residuals for fuel and of veneer cores for lumber also 

 contributed to the reduction in waste. The remaining 

 primary plant residues may be close to a practical 

 minimum. There will probably always be some 

 residues at primary manufacturing plants because of 

 the small volumes generated or location relative to 

 consuming plants. 



Urban wood wastes constitute a substantial solid- 

 waste disposal problem and a potential source of 

 increased product supply. The major categories of 

 such wastes are waste paper; solid wood product 

 residues from building construction, building demoli- 

 tion, and used pallets, crates, and dunnage; and 

 urban tree removals. A recent estimate of annual 

 formation of such wastes is as follows: 



Waste paper 45 million tons 



Waste solid wood products 14 million tons 

 Urban tree removals 3 million tons 



Recycling and fuel uses consume from 20 to 30 

 percent of the urban waste paper annually. Salvage 

 for products or fuel probably accounts for about one- 



There are still large volumes of wood left after harvest in some areas, and particularly in the old growth forests of the West. Most of this 

 material is low quality and suitable only for the production of fiber products or use as fuel. 







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