Table 30. — Average annual cut of trees of saw-timber size 1925 30, 1937-39, theoretical allowable cut under sustained yield 1936, and 



ultimate sustained-yield capacity on available lands 





[In million hoard feet- 



-i. e., (11 ID, 1)00 



omitted] 













Annual 



cut 

 1925-36 



Annual 



cut 

 1937-39 



Allowable under sustained yield, 1936 



Ultimate sustained- 

 yield capacity ] 



Unit 



Ponderosa pine types ' 



Other 



types 



Ponderosa 

 pine sites 



Other 





50-50 



75-50 



95-75 



sites 



Eastern Washington: 



Chelan-ColviUe 



iei 



145 

 21 



19(1 

 161 

 23 



126 



108 



8 



123 

 103 



8 



106 

 88 



7 



114 

 119 

 13 



224 

 152 

 18 



171 





181 



North Blue Mountain 



18 







Total 



327 



374 



242 



234 



201 



246 



394 



370 







Eastern Oregon: 



North Blue Mountain _ . . __ 



113 



256 

 133 

 430 



131 

 343 

 232 

 667 



94 



205 

 195 

 390 



88 

 195 

 187 

 365 



77 

 170 

 168 

 314 



57 

 36 

 27 

 21 



166 

 210 

 290 

 344 



91 





39 





47 





42 







Total 



932 



1,373 



884 



835 



729 



141 



1,010 



219 









1,259 



1,747 



1,126 



1,069 



930 



387 



1,404 



589 







1 Allowable cut under sustained yield if cutting in the ponderosa pine types during the period 1936-65 takes the form (50-50) of light maturity-thrift 

 selection on both private and public lands: and (75-50) of heavy maturity-thrift selection on private, and light maturity-thrift selection on other lands; 

 and (95-75) of virtual clear cutting on private, and heavy maturity-thrift selection on other lands. 



1 Potential annual growth. 



timber-supply problem is most acute here, owing 

 to the heavy concentration of sawmill capacity 

 and the extremely high cut in the Klamath Basin. 

 In fact if the relation of cut to timber supply is 

 analyzed for Klamath County alone, or for the 

 so-called Klamath production area, 8 the situa- 

 tion appears even more critical. Some of the 

 timber in eastern Jackson County (in the Douglas- 

 fir region) may move to the Klamath Basin, but 

 the volume available from this source would not 

 support production at the present rate in the 

 Klamath Plateau unit for more than 2 years. 

 On the other hand, a substantial timber volume 

 in northern Klamath County will be milled in the 

 Deschutes River unit. Some students of the situa- 

 tion have predicted that timber in northern Cali- 

 fornia will move to Klamath Basin mills. The 

 maximum supply that could be derived from this 

 source would furnish not more than a 5-year cut 

 at the present rate. The amount that will actually 



! Includes the territory from the northern boundary of 

 the Klamath Indian Reservation, south to the Oregon- 

 California line, and from the divide in Lake County between 

 the Klamath Basin and the Goose Lake and Summer Lake 

 drainages west to the summit of the Cascade Range. 



be derived from this source will likely be much 

 less, owing to competition for stumpage from 

 northern California mills. 



Saw-timber cut at the average rate for 1925-36 

 could be sustained from the ponderosa pine types 

 without change of forestry practice only in the 

 South Blue Mountain unit. Since that period, pro- 

 duction in this unit has increased considerably be- 

 yond the sustainable volume. 



The timber budget could be balanced at the 

 1937-39 level of cutting in the Washington units 

 and the North Blue Mountain Oregon unit if the 

 volume in the nonpine types were economically 

 available. However, the production capacity of 

 these types in the Deschutes River, South Blue 

 Mountain, and Klamath Plateau units, the large 

 producers of the region, is of minor importance. 



Immediate adoption of a sustained-yield policy 

 would mean reducing the present cut drastically in 

 the principal producing centers and considerably 

 elsewhere. In spite of the difficulties now involved 

 in reducing the cut, the longer such reduction is 

 postponed the more severe will be the eventual cur- 

 tailment enforced by lack of merchantable raw 

 material. 



75 



