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16 <br /> habitat requirements). Some will shift to adjacent areas, some <br /> (particularly rodents, reptiles and amphibians) may be extirpated from <br /> limited areas. To determine impacts precisely would require detailed <br /> studies. <br /> Net result of the mining operation obviously is some loss of habitat. <br /> However, the impacts on larger mammals, songbirds and raptors which <br /> occupy the ponderosa pine-oak, pinon-juniper and grassland types would <br /> be quite small . On the other hand, some obligate species of riparian <br /> and stream habitats may be disturbed to a greater degree. The greatest <br /> impact would be expected at the Allen Mine where structures, roads and <br /> holding ponds are lcoated within the riparian zone. Species that <br /> might be adversely affected include raccoon (Procyon Zotor), white-footed <br /> mouse (Peromyscus diffic2Zis), wandering garter snake, great blue heron <br /> (Ardea herodias), and common snipe (Capella gallinago). For other species <br /> occurring in this type, and which may be affected, see Appendix. <br /> Fish <br /> Closely associated with and interrelated to the riparian zone are <br /> the stream habitats. These have been altered by mining operations in <br /> several ways . In the past, roads were built across the river, requiring <br /> fills and culverts. Diversions were constructed in the river. Refuse <br /> piles were deposited up to the river bank at the Allen Mine, eliminating <br /> riparian vegetation and often without providing suitable waterways to <br /> I <br /> the river from natural drainage systems behind the piles. Surface <br /> erosion of old refuse piles is evident at the Allen Mine. <br />