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 The 3Z30 acres of pre -commercial thinning done on these lands over the 



last four years have cost an average of $15. 22 per acre. By doubling the 



growth rate, which xnean6 raising the board foot per acre per year growth from 



100 board feet to 200 board feet, an increase in merchantable volume of 2000 



board feet is accumulated in 20 years. At current stumpage rates, this is 



worth $100 gained as compared to the $15. 22 expenditure. 



The immediate goal is to thin ZOOO acres annually of stands under mer- 

 chantable size, with the goal of reaching 4000 acres annually by the end of this 

 ten year period. Initially, this work will be done in stands in the advanced re- 

 production stage to push them along at a faster rate of growth to provide 

 volumes for cutting in the critical period 30 to 40 years from now. As thestr 

 stands are completed, the new reproduction from the 20, 000 acres of present 

 seed trees will be large enough~^to thin and clean and will all be thinned by the 

 time they reach 20 years of age. 



Commercial thinning of all stands now in the small sawtimber size will 

 be pushed as rapidly as possible an-,: wherever sufficient stud log volume is 

 developed to make the operation commercially feasible. At present, stands 

 needing removal of 1000 board feet per acre if roaded, or 2000 board feet per 

 acre if requiring roading, will be considered operable for commercial thinning 



SITE PREPARATION 



(a) Scarification will be done wherever necessary to re-establish ponderosa 

 pine anc larch on this type of timberlana. Dozer piling in conjunction 

 with slash disposal will be tht usual mtthod, although dozer stripping 

 may be used to pee! off grass soa areas where requirea. 



(b) BroaacasT burnin g for site preparation will be used only where it is 

 necessary to destroy the entire uncer story in order to get a new stand 



