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Historic Water Yield for Spruce -Fir Stand Composition <br />USFS North Platte Basin <br />30 <br />25 <br />�o <br />0 20 <br />0 <br />!o <br />x 15 <br />d <br />Q 10 <br />5 <br />0 <br />1860 1880 1900 1920 1940 1960 1980 2000 <br />i <br />M Non p Seed/Sap a Pole 0 Saw p Water Yield <br />Figure 18: Historic water yield and stand composition, Spruce -Fir. <br />10 <br />8 <br />0 <br />0 <br />00 6 <br />V_ <br />x <br />w 4 <br />a <br />2 <br />0 <br />Historic Water Yield for Ponderosa Pine Stand Composition <br />USFS North Platte Basin <br />t <br />I <br />21 <br />20 <br />i <br />i <br />19 �+ <br />18 I <br />17 j <br />3 <br />16 <br />15 1 <br />Figure 19: Historic water yield and stand composition, Ponderosa Pine. <br />Historic Water Yield for Douglas Fir Stand Composition <br />USFS North Platte Basin <br />12 8 <br />0 9 7 <br />Q d <br />Q g <br />r <br />x 6 s 6 :5 <br />y D <br />L a <br />Q 3 5 <br />t <br />0 4 <br />1860 1880 1900 1920 1940 1960 1980 2000 <br />F Non E3 Seed/Sap N Pole 0 Saw p Water Yield <br />Figure 20: Historic water yield and stand composition, Douglas Fir. <br />33 <br />