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rl), ~.')!~ -' . ...' J J,. Impacts from Acquisition of Non-Federal Lands. The acquisition of private lands containing crucial elk and deer winter range would prevent the loss of habitat through subdivision development and human activities. Impacts from Wilderness Study Area Management. Flexibility to manipulate wildlife habitat would continue to be limited in WSAs, potentially resulting in reduced options for wildlife transplant locations. CUMULATIVE IMPACTS ON TERRESTRIAL WilDLIFE HABITAT Management actions identified in this alternative would gradually improve wildlife habitat conditions. Big game habitat would improve through land treatment projects. Bighorn sheep herds would continue to fluctuate widely due to disease. Sage grouse habitat would be decreased and populations would potentially be reduced as a result of some sagebrush treatments. IMPACTS ON FISHERY RESOURCES (AQUATIC HABITAT) IMPACTS FROM PROPOSED MANAGEMENT ACTIONS Impacts from Locatable Minerals Management. Mineral entry and location being precluded on 45,282 acres of withdrawn federal mineral estate would prevent possible reductions in fIshery habitat quality, or a complete loss of some fishery habitat on some streams due to mining activities and associated road construction on effected fIsheries, Loss of fishery habitat due to sedimentation and channelization would be greatest if mineral development were to occur in alluvial soils along or in streambanks. These lands have a low or no likelihood for the occurrence of locatable minerals, Impacts from Soil and Water Resources Management. Vegetation treatments designed to reduce soil erosion would enhance aquatic habitat by decreasing the amount and frequency of sediments entering the streams. Acquisition of water rights, including instream flows, would ensure sufficient water to maintain the present fIsh population. CURRENT MANAGEMENT IMPACTS Impacts from Livestock Grazing Management. Restricting livestock use to proper utilization levels in some riparian zones would decrease sedimentation of fIshery strea,ms in these areas, stabilize streambanks and increase overhanging cover. Fishery habitat would improve through improvement of water quality and increase in aquatic vegetation and insects. Impacts from Forest Management. Timber harvests and associated activities, such as road, skid trail, and staging area construction, in some drainages with fIshery streams would increase sedimentation and alter stream channels. Impacts from Recreation Management. The construction of recreation facilities and increased recreational use of flShery streams would cause the loss of or reduction in the quality of some fishery habitat on about 3.5 miles of streams. Impacts from Rights-of-Way Management. Construction of roads and pipelines in or across flShery streams would result in the sbort-term loss, or damage to, fishery habitat. CUMULATIVE IMPACTS ON FISHERY RESOURCES (AQUATIC HABITAT) Fisbery habitat would be lost due to management actions identified in this alternative. Construction of roads and decreases in streambank cover would increase sedimentation and alter stream channels and increase water temperatures. IMPACTS ON LIVESTOCK GRAZING MANAGEMENT IMPACTS FROM PROPOSED MANAGEMENT ACTIONS Impacts from Livestock Grazing Management. A total of 47,256 AUM's would be available for livestock grazing on 146 grazing allotments. If implemented, land treatment projects would improve livestock distribution and forage quality. Implementing actions to ensure livestock utilization levels in the less-than-heavy range in some riparian 4-7