Figure 17. — A stand of aspen bordering the Sanpoil River in north- 

 eastern Washington. These trees range from 4 inches to 10 inches 

 d. b. h. 



Nearly two-thirds of the total ponderosa pine land 

 is site IV, which is the most common site class 

 in every forested county. More than three-fourths 

 of the remainder, however, is site V or VI. 



More than two-thirds of the 712,000 acres of 

 site III land is in Oregon, and half of it is in the 

 Klamath unit. Most of the small area of site 

 classes I and 1 1 is in Washington, on the east slope 

 of the Cascade Range immediately north of the 

 Columbia River. The small area of site II that 

 occurs in Oregon is scattered along the east slope 

 of the Cascade Range from Warm Springs Indian 

 Reservation south to the California line. 



Lands judged by the Douglas-fir site classification 

 are decidedly substandard. There is no Douglas- 



fir site I land, very little site II, and comparatively 

 little site III. The area of Douglas-fir site V land 

 is nearly three times that of site V in all of western 

 Oregon and western Washington where Douglas- 

 fir is the predominant forest type. 



Timber Volume 



The determination of the extent and character 

 of the region's timber stand was one of the most 

 important parts of the forest survey. The result- 

 ing data can be used in analyzing the immediate 

 supply of raw materials for the region's forest 

 industries and for other markets. 



Table 8. — Land areas in the ponderosa pine region, forest-land 

 areas, and commercial conifer areas, by site-quality class, 1 1936 



Kind of forest and site- 

 quality class 



Total land area 



Area in 

 forest 

 land 



Area in 

 commer- 

 cial 

 conifers 



Commercial conifer: 

 Ponderosa pine: 



Class I 



Acres 



480 



18, 018 



711, 604 



7. 849, 633 



3, 193, 731 



268, 801 



Percent 



Percent 



Percent 



Class II 



0.03 

 1.09 

 11.99 



4.88 

 .41 



0.08 

 3.22 

 35.54 

 14.46 

 1.22 



11 



Class III 



4.40 



Class IV .. 



48. 55 



Class V 



19.76 



Class VI . 



1 66 







Total 



12, 042, 267 



18.40 



54.52 



74.48 







Douglas-fir: 



Class II 



320 



117, 400 



971,641 



3, 036, 152 









Class III - 



.18 

 1.48 

 4.64 



.53 

 4.40 

 13.75 



.73 



Class IV 



6.01 



Class V 



18.78 







Total 



4, 125, 513 



6.30 



18.68 



25.52 







Total commercial 

 conifer. 



16,167,780 



24.70 



73.20 



100.00 



Lodgepole pine „ . . . 



2,001,875 



1, 537. 700 



1, 039, 005 



1, 233, 465 



66, 380 



39,905 



3.06 



2.35 

 1.58 

 1.88 

 .10 

 .07 



9.06 



6.96 



4.71 



5.59 



.30 



.18 





Juniper and mountain ma- 

 hogany .. .. . _. 









Subalpine. - -- 





Oak 





Hardwood 









Total other than 



5, 918, 330 



9.04 



26.80 











22, 086, 110 

 43, 373, 830 



33.74 

 66.26 



100.00 





Nonforest types.. .... 













65, 459, 940 



100.00 













1 Deforested areas, types 35A, 35B, and 37. were classified as to site on 

 the basis of original type: some lodgepole pine type areas were assigned 

 ponderosa pine or Douglas-fir site qualities; and some deforested burns 

 and insect-killed areas were included in the lodgepole pine, subalpine, 

 western juniper, or noncommercial rocky areas. 



26 



