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~,)23~5 Impacts tram Wildlife Habitat Management. Maintaining existing treatments and developing new wildlife treatments on uplands and within riparian areas, allocating new available forage to meet watershed objective fIrst, potentially reducing big game nUJI\bers in GMUs 54, 55, 551, and a part of GMU 64, and implementing other wildlife mitigation measures would result in improved livestock distribution and forage quality over the life of the plan. Not authorizing any livestock grazing in the Bighorn-A (unit 0-4), and Bighorn-B (unit 0-5) ACECs and not authorizing domestic sheep grazing in unit 0-17 or 0- 20 south and west of Lake City on 31,651 suitable acres in order to prevent disease transfer to bighorn sheep, to improve habitat, and to help herd numbers increase would result in cancellation of grazing permits and livestock reductions of 3,502 AUMs. Not authorizing sheep grazing on the part of unit 0.20 north of Lake City would result in a change of class of livestock to cattle only on affected allotments. Not authorizing livestock grazing in allotment 6200 in units 0-16 and 0-10 on 837 suitable acres would reduce livestock forage allocations by 114 AUMs. Not authorizing domestic sheep grazing on 1,617 suitable acres in allotment 6056 in unit 0-16 to also reduce forage competition would reduce livestock forage allocations by 54 AUMs. Not authorizing domestic sheep grazing in allotment 6112 in units 0-16 and O. 19, and on the remainder of unit 0-6 would result in a change of class of livestock on these allotments to cattle only. Limiting fall livestock use to four days in order to provide more use of fall vegetation' regrowth by wildlife on 2,400 suitable acres in GMUs 55 and 551 would result in the need for more intensive livestock grazing administration, while providing more forage during the affected time of year. Excluding treatments on 63,252 suitable aces on wildlife habitats would eliminate opportunities to increase or improve forage on these lands. Restricting livestock treatments on about 362,170 suitable acres and restricting grazing administration on about 148,710 acres for management of wildlife habitats would possibly increase costs and time for planning and implementation, or operator's costs for livestock management. ALTERNATIVE D IMPACTS Impacts from Fishery Resources (Aquatic Habitat Management). Pursuing and aequiring instream flow appropriations on 13 miles of fishery streantS and implementing fIshery resource mitigating measures in activity plans to improve upon or prevent damage to or loss of fishery stream channels and associated riparian resources would indirectly improve forage quantity and quality, over the life of the plan. Impacts from Forest Management. Commercial timber and woodland harvests would, over the life of the plan, increase forage and help improve livestock distribution on some of the 34,679 acres of suitable commercial forest lands and '1:1,352 acres of suitable woodlands available for harvest. Mitigating measures and harvest restrictions, especially within riparian areas, would help limit removal of forage in affected areas during harvesting of forest products. Excluding livestock for fIve years in Unit 0-21 on reforested sites or treated areas could result in temporary reductions of forage allocated to livestock, and more administration of livestock would be required. Impacts from Recreation Management. Restricting livestock grazing treatments and projects and managing grazing to maintain recreation settings on 37,867 suitable acres in unit 0-19 would limit the scope of these future proposals and possibly increase BLM's or operators' management and use supervision time or costs. Designation of an additional 14,389 acres of public land as closed to OHV traffic, and limiting OHV traffic on an additional 34,943 acres to designated routes yearlong would reduce livestock harassment and management concerns on these lands. Impacts tram Visual Resource Management. Not permitting livestock grazing on 1,040 suitable acres in unit 0-8, American Basin ACEC in order to maintain and protect scenic resources would reduce livestock allocations by 250 AUMs. Not authorizing livestock grazing on 147 suitable acres on allotment 6200 (Dillon Pinnacles ACEC, unit 0-8) would reduce livestock allocations, the impact of which is discussed under livestock allocations, the impact of which is discussed under wildlife habitat management. 4-49