2012-06-20_PERMIT FILE - C2010089A (7)

Home Browse Search

are small portions of irrigated lawns. Outside of the planted lawn grass areas, the vegetation is dominated mostly by annuals consisting mostly of Summer Cypress, Cheatgrass and Russian Thistle. On numerous portions of the Glasier property, there has been a rather significant invasion of Russian Knapweed into these areas. The total area of the Residential / Agricultural Disturbance vegetation type as shown on Map 2.04.10 -1, Permit Area Vegetation Map, is 3.47 acres and this type equals 1.08 percent of the proposed mine permit area. PONDS This vegetation type exists in those areas corresponding to livestock ponds and irrigation holding ponds. These sites are devoid of vegetation, because they possess standing water for sufficient time during the year to drown out even the most water tolerant species. There are eight livestock ponds located within the proposed NHN Mine permit area. The total area of the Ponds vegetation type as shown on Map 2.04.10 -1, Permit Area Vegetation Map, is 1.03 acres and this type equals 0.32 percent of the proposed mine permit area. IRRIGATION DITCH This vegetation type corresponds to the Second Park Lateral Ditch which enters the site near the southeastern portion of the Meehan property and exits the area on the western side of the Garvey property. Given the duration and rate of flowing water, this large ditch is devoid of vegetation and can more correctly be considered to be a canal. All other smaller lateral ditches on the site have the water moved with sufficient regularity that they are mostly dominated by plants. The total area of the Irrigation Ditch vegetation type as shown on Map 2.04.10 -1, Permit Area Vegetation Map, is 0.46 acres and this type equals 0.14 percent of the proposed mine permit area. DRAINAGE CHANNEL This vegetation type exists in those areas where irrigation tailwaters flowing from up slope fields collects in the bottoms of swales and draws to form stream channels. This designation corresponds to those areas covered by the COE regulations for sites possessing an ordinary high water mark (OHWM). According to their regulations, areas possessing an OHWM possess flowing waters for sufficient duration to render them devoid of vegetation either through the processes of physical eradication or by flooding out the vegetation. Within the proposed NHN Mine permit area, there are two areas, one in the bottom of Meehan Draw and the other in the bottom of the unnamed drawing which flows across the southeast portion of the site which possesses these characteristics. Section 2.04.10 Page 21 November 2011