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. The results of the spring small mammal trapping survey are presented in Table 2.04.11-3. The undisturbed pinyon-juniper/sagebrush rocky bluff supported the most diverse small mammal fauna. The agricultural area (Line No. 3) was also relatively diverse. The rangeland habitat had the lowest diversity value and the lowest capture rate. The orchard site with only 16 trap nights had the highest capture rate. A total of five species were found during this trapping period. Two of these, the Colorado chipmunk and white-throated woodrat were found only on the undisturbed pinyon-juniper/sagebrush bluff. The pinyon mouse and house mouse were found only during the spring. The fall small mammal trapping results are presented in Table 2.04.11-4. The agricultural area (Line No. 8) had the greatest diversity and capture rate. The rangeland, as in the spring, again had the lowest diversity and capture rate. The western harvest mouse, deer mouse, and long- tailed vole were found during both survey periods. Mule deer was the only large mammal species observed in the study area. The number of deer observed per day in the study area and immediate vicinity varied from zero to 15 with a mean daily observation rate of 5,63 (st. dev. = 9.95; n [observation days] = 22). Most observations made in the daylight hours were in the willow component of the swales, in old orchards, and in rangeland habitats. In the early evenings and mornings, deer were occasionally observed • foraging in irrigated pastures and meadows. Observational records indicate that deer are present in the study area all year. Deer move into the San Miguel Valley in winter from neighboring plateaus (R. Arant pers. comm.), but winter observations indicate no notable concentrations in the study area at that time. Elk winter in the San Miguel River Valley, having descended from adjacent plateaus and mountains. Elk are occasionaAy seen in the Nucla area (R. Arant pers. comm.). No elk or elk sign was observed in the New Horizon 2 study area during the course of conducting baseline studies. The muskrat, raccoon, striped skunk, and coyote are the furbearing mammals that were confirmed in the New Horizon 2 study area. The red fox and the long-tailed weasel were reported at the New Horizon 1 Mine in 1980 (Peabody Tab 11, Wildlife Baseline Report - Nucla Mine). The occurrence of these species was not quantified but observations indicate that striped skunks and muskrats are numerous in the study area. The bobcat, gray fox, and ring- tailed cat also occur in the San Miguel River Valley (R. Arant pers. comm.), but none were observed during the course of conducting baseline studies. . (REVISE06/27/01) 2.04.11-13