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CHAPTER FOUR Impacts from Locatable Minerals Management. Mining activity could result in accidental loss or removal of skiff milkvetch or Uncompahgre fritillary butterfly habitat, or other listed or classified species habitat. Required plans of operation would reduce this likelihood, however. Impacts from Oil, Gas, and Geothermal Management. No significant impacts are anticipated from one or two wells. The proposed no-surface occupancy stipulations would protect both the Uncompahgre fritillary butterfly and skiff milkvetch habitat in the event of any exploratory development. Impacts from Saleable Minerals Management. Not permitting the disposal of mineral materials on 62,037 acres would prevent the accidental loss/removal of elassified or listed habitat or species from surface disturbance from mineral material disposal 00 these lands. On-site examinations and mitigation required on the remainder of public lands for this discretionary action would further help to prevent accidental loss of species or habitat. Impacts from Livestock Grazing Management. The elimination of domestic sheepgrazing within the South Beaver Creek ACEC and intensive management of livestock grazing in the RedcIoud Peak ACEC would prevent or help prevent accidental loss of special status habitat and species in these areas. Implementing minimum stubble heights in riparian zones would improve habitat conditions for whooping and sandhill cranes, bald eagles, yellow billed cuckoos, and skiff milkvetch. Impacts from Recreation Management. Limiting OHV use to designated routes and trails yearlong in skiff milkvetch and Uncompahgre fritillary butterfly habitat would help prevent the accidental destruction of the species and their habitat from OHV use. Impacts from Rlghts.of-Way Management. Designating and managing public lands in the Redeloud Peak ACEC as a rights-of-way avoidance area and implementing rights-of-way location restrictions on public lands in the South Beaver Creek ACEC containing skiff milkvetch populations would help prevent accidental loss of these habitats and species from this land use. Impacts from Acquisition of Non-Federal Lands. Acquiring non-federal lands which contain colonies of skiff milkvetch would maintain the present population and increase the population by 35% on public lands. CUMULATIVE IMPACTS ON SPECIAL STATUS PLANT AND ANIMAL SPECIES AND HABITAT Special designations, limiting OHV use and implementing restrictions on livestock grazing and rights-of-way location would protect and enhance habitat for special status species and would help prevent accidental destruction or loss of these species and their habitat in these areas. IMPACTS ON TERRESTRIAL WILDLIFE AND HABITAT IMPACTS FROM PROPOSED MANAGEMENT ACTIONS Impacts from Wildlife Habital Management. Land treatment projects, water developments and managing elk and deer populations at recommended levels would increase wildlife forage production, availability, and quality to meet CDOW long-range or big game elk and deer herd goals. Improvement of habitat quality would improve animal distribution, reduce stress and improve forage utilization to acceptable levels in some areas. Minim;,;ng disturbances within big game crucial winter range and elk calving areas would reduce stress and fetal mortality, and increase calf survival. Designating the 28,215 acre West Antelope ACEC and implementing special management attention would improve and increase big game crucial winter range forage, plant vigor, carrying capacity, and thermal and hiding cover. Limiting forage utilization to a maximum of 50% of key forage species, and working with CDOW to reduce deer numbers on 3,302 acres of crucial big game winter range in GMU 64 near Cimarron would improve elk and deer forage conditions and carrying 4-60