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CHAPTER FOUR Impacts from Transportation and Access. Acquiring access into 6 new acres for livestock grazing administration would improve management of the grazing program, but 2 of the 6 would be for public access, which would result in some degree of additional livestock harassment and vandalism to livestock facilities. Impacts from Acquisltlon of Non-Federal Lands. Acquiring 40 acres of private land in unit 0-19, Powderhorn SRMA, would result in an increase of about 20 AUMs of new available forage for allocations. CUMULATIVE IMPACTS ON LIVESTOCK GRAZING MANAGEMENT Eliminating or not authorizing livestock grazing and implementing minimum stubble heights and 20-40% utilization rates would result in a net decrease of ll,406 AUMs. Long-term livestoek forage condition, vigor, and distribution would be improved as a result of vegetative treatments and improvements in forage quality and quantity. IMPACTS ON FOREST MANAGEMENT IMPACTS FROM PROPOSED MANAGEMENT ACTIONS Impaets from Forest Management. Approximately 34,679 acres of suitable commercial forest lands and 27,352 acres of suitable woodlands would be available for harvest. This would result in an annual harvest of approximately 1,040 MBF of commercial forest products, 565 cords of fuelwood, and other forest products. Impacts from Soil and Water Resources Management. Erosion control requirements would eliminate timber harvests on 250 acres of commercial forest lands. This would result in a loss of 7.5 MBF annually. Impacts from Riparian Zone Management. Restrictions in riparian zones would,eliminate timber harvests on 1,000 acres of commercial forest lands. This would result in a loss of 30 MBF annually. Impacts from Wildlife Hahitat Management. Harvest restrictions on crucial big game winter ranges would eliminate harvest on 138 acres resulting in a loss of 5 MBF annually. Requirements for non-game habitat would eliminate harvest on 1,000 acres of commercial ponderosa pine, resulting in a loss of 3() MBF annually. Leaving sufficient cover for elk hiding cover would eliminate harvest on 2,000 acres of commercial forest lands resulting in a loss of 60 MBF annually. Restrictions on timber harvest from May 1 to June 3() in elk calving areas would shorten the usual six month harvest season by two months. If an estimated 10 goshawk nests are located, 1,260 acres of commercial timber would not be available for harvest, resulting in a loss of 38 MBF per year. Protecting other raptor nestsites would remove 500 acres from the timber base, resulting in a loss of 15 MBF per year. Limiting road construction to 1.5 miles per sqnare mile would preclude harvest on approximately 500 acres of commercial forest lands, which would result in a reduction of 15 MBF per year. Impacts from Recreation Management. Restrictions on timber harvests in units 0-17, 0-19 and 0-20, to enhance recreation management and primitive ROS settings, would eliminate timber harvest on 14,285 acres of commercial forest lands. This would result in a loss of 428 MBF annually. Increasing recreational use on High Mesa would create a serious safety hazard along the switchbacks on the High Mesa Road between logging trucks and recreational vehicles. Impacts from Visual Resource Management. Managing the commercial forest lands within two miles of the Powderhorn SRMA under VRM class II objectives would eliminate timber harvests on 2,500 acres of commercial forest lands, which would result in a loss of 75 MBF annually. Impacts from Fire Management. Identifying Management Unit 0-21 for conditional suppression could result in wildfires within approximately 1,000 acres of commercial timber, potentially resulting in a loss of 3() MBF annually. 4-50