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Baseline Technical Report <br /> ARCADIS Report for Soils and Biological <br /> Resources, MLE2 Project Area <br /> open to dense (50 to 70 percent), depending on the amount of time that has passed <br /> since reclamation. Noxious weeds are present where native vegetation has not been <br /> completely re-established. <br /> 3.10 Noxious Weeds <br /> Noxious weeds are primarily associated with disturbed areas and alongside roads. <br /> The most commonly noted species is yellow toadflax (Linaria vulgaris), with lesser <br /> amounts of Canada thistle, musk thistle (Carduus nutans), oxeye daisy <br /> (Chrysanthemum leucanthemum), bull thistle, cheatgrass (Anisantha tectorum), and <br /> Dalmatian toadflax. These species do not presently appear to be displacing native <br /> vegetation. Several of these species were probably introduced to the area as <br /> ornamentals (toadflax and ox-eye daisy), or by livestock(thistles and cheatgrass). <br /> 3.11 Potential Impacts to Vegetation Resources <br /> The project footprint should be limited to the proposed project boundary to the <br /> greatest extent feasible as to avoid unanticipated impacts to native vegetation. <br /> Reclamation performance standards per Rule 3 of the Mineral Rules and Regulations <br /> of the Colorado Mined Land Reclamation Board (CMLRB) for Hard Rock, Metal, and <br /> Designated Mining Operations (CMLRB 2010) should be implemented for post- <br /> mining use. Per this rule, CC&V will need to choose how the affected lands will be <br /> reclaimed (and how to avoid introduction of noxious weeds to the site), and the <br /> results of these decisions will need to be formulated into a Reclamation Plan. <br /> Reclamation measures per section 3.1.5 of CMLRB mining rules and regulations <br /> (CMLRB 2010) should be implemented. <br /> A delineation of potential wetlands and other waters of the U.S. for the areas of new <br /> disturbance included in the MLE2 Project of the Cresson Project by CC&V was <br /> completed in July of 2011. Wetlands and other waters are regulated under Section <br /> 404 of the Clean Water Act (CWA) and authorization (a Section 404 permit) is <br /> required for the placement of dredged and fill material into them. No wetlands or <br /> other waters regulated under Section 404 were found in any of the study areas. The <br /> lack of these features is due to the relatively small watersheds, well drained soils, <br /> steep slopes, and only moderate precipitation of the study areas. <br /> Disturbances to the prevailing hydrologic balance of the affected land and <br /> surrounding area and to the quantity or quality of water in surface and groundwater <br /> systems should be minimized per measures as described in Section 3.1.6 (Water — <br /> General Requirements) of the CMLRB mining ruling and regulations (CMLRB 2010). <br /> CCV Baseline Soils Biology Resource Report(11-17-11).doc 15 <br />