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2.04.10 Vegetation Information Six vegetation communities and a small amount of cropland exist within the Colowyo permit boundary. The vegetation communities are sagebrush, mountain shrub, juniper, aspen woodland, riparian and grassland. The approximate extent of the vegetation communities throughout the permit area is shown on Regional Vegetation Map (Map 3). The vegetation communities on the area to be disturbed by' mining are mapped in more detail on the Vegetation Iv1ap (Map 4). The amount of area comprising each type to be mined is found in Table 1, Vegetation Community Distribution on Areas to be Mined. Areas currently used as reference areas to evaluate the success of revegetation are also located on the Vegetation Map (Map 4) and the Regional Vegetation Map (Map 3). During the summer of 1980, an intensive vegetation study was completed covering the initial permit area to be disturbed by mining. The area to be mined consists, primarily, of the sagebrush and mountain shrub communities with small inclusions of aspen and grass. During the summer of 1988 vegetation study was completed for the additional areas to be added to the permit. The additional areas to be mined consisted, primarily, of the sagebrush, mountain shrub and aspen communities. • Vegetative mapping was accomplished utilizing information from previous vegetation surveys in the area, the 1976 VTN Colorado Inc. study, color aerial photography and on the ground observations. Sampling locations were selected by using 300 foot by 300 foot numbered grid system covering the entire area to be sampled. Individual transect sites were sampled at random using the numbers from the grid system for each vegetation type. At each selected point, a 100 foot transect was laid out oriented in a randomly selected compass direction. Five random points along each transect were then selected for the quantitative vegetation sampling. 2.04.10-I Revision Date: 3/13/92 Revision No.: