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EYHIBIT J (Cont'd) <br />' Stock and Erosion Control Ponds- <br />Thmughout the area there are small erosion control dams as xell as larger <br />' ponds that could be used as stock ponds. The vegetation of these areas is in part <br />related to the drainage courses and in Hart related to stockpile vegetation yet <br />' tc bz described. Three different areas can be identified. <br />The dam structure is mostly of weedy species (Bromus tectorum, Allysum, Relianthus, <br />etc.) and some other invaders including Rabbitbrush. Near the xaterline and more <br />' or less in the vicinity of the previous drainage course Cottonwoods can be found <br />that are in the range of 10 to 25 years old. A fex willows may also be found. <br />' The pond slopes themselves may be either bare or densely covered xith <br />Xanthium italicum (Cocklebur). There does not seem to be much of any condition <br />' in between these txo extremes. The cause of this phenomenon is unknoxn. <br />Stockpiles- <br />' Part of t.tie affected land is currently operated as a mine. Over the years <br />soil, overburden, and unusable clay have been saved for backfilling purposes. <br />' These stockpiles have all been invaded by various plant species and some areas <br />were planted. Taken together they present one of the most important resources for <br />ascerte.i.ning the possibilities of successfully revegetating areas that will beccme <br />ready for reclamation in the future. <br />There are three types of stockpiles found on the property. Most of them are <br />' composed of overburden, there are some that are topsoil, and a fex of clay. Many <br />intergrade. Vegetation occu=xence appears to be controlled by 1) the composition <br />' of the material, 2) the time since it xas deposited, 3) the amount of planting <br />that occurred, if any, and 4) the species planted where planting occurred. <br />The species can be grouped into txo major divisions, the invaders and those <br />that were planted. Table 4 lists these species and their characteristics. <br />' With respect to the four factors controllirg the vegetational differentiation <br />a large number of variations are possible on these stockpile areas. In summary, <br />the following patterns can be found: <br />' I. Relatively young stockpile areas <br />A. Overburden, unplanted -generally these areas are invaded by type 1 <br />' species and only sloxly allow type 2 species to invade. <br />B. Seil, unplanted - almost invariably, topsoil stockpiles beccme centers <br />of distribution for type 2 species that can be serious pests. <br />C. Overbunien, planted - none seen. <br />' _r,, Soil, planted - low diversity, highly productive communities of planted <br />species generally lacking in weed growth. <br /> <br />1 <br />45 <br />