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RULE 2 PERMITS <br /> <br />Rule 2 Permits 2.04-52 Revision Date: 6/4/25 <br /> Revision No.: MR-264 <br /> <br />2.04.10 Vegetation Information <br /> <br />Six vegetation communities and a small amount of cropland exist within the Colowyo permit <br />boundary. The vegetation communities are sagebrush, mountain shrub, juniper, aspen woodland, <br />riparian and grassland. <br /> <br />The approximate extent of the vegetation communities throughout the permit area is shown on <br />Regional Vegetation Map (Map 4). The vegetation communities on the area to be disturbed by' <br />mining are mapped in more detail on the Vegetation Map (Map 4). The amount of area comprising <br />each type to be mined is found in Table 2.04.10-1, Vegetation Community Distribution on Areas <br />to be Mined. <br /> <br />During the summer of 1980, an intensive vegetation study was completed covering the initial <br />permit area to be disturbed by mining. The area to be mined consists, primarily, of the sagebrush <br />and mountain shrub communities with small inclusions of aspen and grass. <br /> <br />During the summer of 1988 vegetation study was completed for the additional areas to be added <br />to the permit. The additional areas to be mined consisted, primarily, of the sagebrush, mountain <br />shrub and aspen communities. <br /> <br />Vegetative mapping was accomplished utilizing information from previous vegetation surveys in <br />the area, the 1976 VTN Colorado Inc. study, color aerial photography and on the ground <br />observations. Sampling locations were selected by using 300 foot by 300 foot numbered grid <br />system covering the entire area to be sampled. Individual transect sites were sampled at random <br />using the numbers from the grid system for each vegetation type. At each selected point, a 100 <br />foot transect was laid out oriented in a randomly selected compass direction. Five random points <br />along each transect were then selected for the quantitative vegetation sampling. <br /> <br />Herbaceous cover data was collected using a 10 point frame at each of the five points along the <br />transect. The first hit by each pin on the herbaceous vegetation was then recorded by species. <br /> <br />Production samples were taken by clipping a 30cm x 60cm plot at each of the same five points <br />along the transect. The clipped herbaceous vegetation was separated into grasses and forbs. There <br />were no measurable amounts of annuals sampled. The samples were air dried then weighed. 60cm <br />x 60cm plots were used for the 1988 data and samples were oven dried prior to weighing. <br /> <br />Woody plant density data was obtained by recording the numbers of woody plants along a three <br />foot wide belt the entire 100 foot length of each transect. <br /> <br />Species composition and cover for the initial 1980 data is shown in Table 2.04.10-2, 1980 <br />Herbaceous Cover by Species. The 1988 data is summarized in Table 2.04.10-3, 1988 Herbaceous <br />Cover by Species. Summaries of the data can be found on Table 2.04.10-4, Summary of <br />Herbaceous Cover. <br />