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Table 5: Historical trend in. stand composition and water yield, <br />Lodgepole Pine. <br />Acres Lodaepole Pine by Size and Year <br />Date <br />Water <br />Yield <br />Non- <br />stocked <br />Seedling/ <br />Sapling <br />Pole <br />Sawtimber <br />Total <br />1860 <br />14.2 <br />278,519 <br />91,503 <br />257,940 <br />23,222 <br />627,963 <br />1880 <br />12.4 <br />13 <br />370,009 <br />32,621 <br />257,940 <br />627,963 <br />1900 <br />14.2 <br />257,940 <br />278,520 <br />91,503 <br />627,963 <br />1920 <br />13.0 <br />529,926 <br />98,036 <br />627,963 <br />1940 <br />11.8 <br />257,940 <br />370,023 <br />32,621 <br />627,963 <br />1960 <br />11.3 <br />32,621 <br />157,035 <br />379,423 <br />91,503 <br />627,963 <br />1980 <br />11.6 <br />91,503 <br />529,926 <br />6,532 <br />627,963 <br />20001 <br />11.3 <br />6,532 <br />91,5031 <br />257,9401 <br />271,986 <br />627,963 <br />Table 6: Historical trend in stand composition and water yield, Spruce - <br />Fir. _ <br />Acres Spruce -Fir by Size and Year <br />Date <br />Water <br />Yield <br />Non- <br />stocked <br />Seedling/ <br />Sapling <br />Pole <br />Sawtimber <br />Total <br />1860 <br />20.3 <br />35,617 <br />247,269 <br />0 <br />23,222 <br />306,108 <br />1880 <br />19.7 <br />39,958 <br />233,528 <br />32,621 <br />2,994 <br />306,108 <br />1900 <br />19.2 <br />2,994 <br />273,486 <br />32,621 <br />306,108 <br />1920 <br />18.0 <br />176,548 <br />129,560 <br />306,108 <br />1940 <br />16.4 <br />41,023 <br />232,463 <br />32,621 <br />306,108 <br />1960 <br />16.8 <br />32,621 <br />250 <br />273,236 <br />306,108 <br />1980 <br />16.7 <br />32,621 <br />269,333 <br />4,153 <br />306,108 <br />2000 <br />16.51 <br />3,4771 <br />32,621 <br />39,958 <br />230,051 <br />306,108 <br />Table 7: Historical trend in stand composition and water yield, <br />Ponderosa Pine. <br />Acres Ponderosa Pine by Size and Year <br />Date <br />Water <br />Yield <br />Non- <br />stocked <br />Seedling/ <br />Sapling <br />Pole <br />Sawtimber <br />Total <br />1860 <br />6.0 <br />83,769 <br />1,086 <br />2,994 <br />87,849 <br />1880 <br />4.0 <br />84,856 <br />2,994 <br />87,849 <br />1900 <br />3.3 <br />2,994 <br />84,856 <br />87,849 <br />1920 <br />3.3 <br />86,763 <br />1,086 <br />87,849 <br />1940 <br />2.1 <br />2,994 <br />84,856 <br />87,849 <br />1960 <br />2.1 <br />87,849 <br />87,849 <br />1980 <br />2.1 <br />1,086 <br />82,947 <br />3,816 <br />87,849 <br />2000 <br />2.3 <br />3,816 <br />1,0861 <br />2,994 <br />79,953 <br />87,849 <br />35 <br />