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precipitation of 15 to 20 inches, with at least 50% of the effective moisture falling <br />as snow. In addition, aT the lower elevations along Trout Creek, the site receives <br />moisture from run in and overflow water. The optimum growing season for native <br />plants is from May 15 to July 15. The winters are typically cold. <br />The site occupies gently sloping to flat areas adjacent to Trout Creek with an <br />elevation of approximately 7000 feet. To the east of Trout Creek, the majority of <br />the site consists of gently rolling to moderately steep slopes, with an elevation range <br />of 7000 feet to 7600 feet. <br />The area along Trout Creek contains deep, valley filling loamy soils of various <br />origins accumulating along drainage ways. Moisture is readily absorbed, and there is <br />also additional run in water to increase plant growth. This area is predominately a <br />grassland site with grasses contributing over 60% of the vegetative cover. Wet areas <br />in the stream bottoms contain predominately willows, sedges, and rushes. The soils <br />to the east of Trout Creek on the sloping uplands and hills range from deep to fairly <br />deep, and, if adequately covered with plant growth, can take water reasonably well <br />and have good water storing capacities. This area is dominated by shrub <br />communities, with sagebrush-snowberry being the most extensive. At the higher <br />elevations and on the ridge tops, the mountain shrub community becomes more <br />• extensive. $erviceberry and oakbrush are the major brush species. The area is <br />essentially treeless, except for a few small stands of Aspen. <br />2.4.2.1 Vegetation Types <br />Aspen Woodland <br />The Aspen Woodland vegetation type is found as small units scattered throughout <br />the permit area. This vegetation type is dominated by Quaking Aspen (Po ulus <br />tremuloides). Associated shrubs include substantial amounts of Snowberry (Sym_ <br />phoricarpos oreophilus) and Wood's Rose (Rosa woodsii). Serviceberry (Amelanchier <br />alnifolia), Chokecherry (Prunus virginiana melanocarpa), Currants and Gooseberry <br />(Ribes spp.) also frequently occur in smaller amounts. Herbaceous species commonly <br />present include Blue Wildrye (Elymus laucus), Agassiz Bluegrass (Poa agassizensis), <br />Common Dandelion (Taraxacum officinale), Sweet Cicely (Osmorhiza occidentalis), <br />Meadowrue (Thalictrum fendleri), and white-flowered Peavine (Lathyrus leucanihus). <br />• In a few stands, introduced forage grasses have become a major understory <br />component. These include mostly Smooth Brame (Bromus inermis) and Orchard-grass <br />(Dactylus glomerata). <br />Revised 7-81 2.4-2 <br />