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this rate to be roughly 23 million seeds per acre, or approximately <br />500 pure live seeds per square foot. This extraordinary rate is <br />necessary under the severe high elevation conditions discu:ased ear- <br />lier. Grass requires two to three years before it becomes firmly <br />established. Excellent first season grass growth at the mane site <br />produces shoots about one inch tall. <br />9.6 PLANTING TIMES <br />Generally, seeding and planting activities are limited to <br />the months of May through September. However, because of f.`requent bad <br />weather, May and September are not dependable months at they mine site. <br />Grass is seeded from about mid-May through July at Henderson West, <br />usually stopped during August, and resumed during the latter half of <br />September. Grass is seeded the entire summer at the mine site because <br />of the very short season. Tree seedlings are planted fiom the latter <br />part of May through mid-July. All transplanting must take place prior <br />to bud-break, i.e. June 1 at the mine site and the middle of May at <br />the mill site. <br />9.7 TREES, SHRUBS <br />Lodgepole pine and Engelmann spruce are the principal tree <br />species planted at the mine site. A 2:1 ratio of lodgepole to Engel- <br />mann spruce is planted because lodgepole are better adapted to open <br />sites. Spruce are included to promote relatively rapid plait succes- <br />Sion on the disturbed sites. <br />It is expected that bristle cone pine and limber Fine will <br />be commercially available in quantity by the time comprehen:;ive <br />9-3 <br />