Environmental Assessment

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AFFECTED ENVIRONMENT & ENVIRONMENTAL CONSEQUENCES CHAPTER 3 From 1990 to 1999, a total of 4,992 acres were either mowed or underburned in the planning area. This includes approximately 1,803 acres of mowing and approximately 3,189 acres of underburning. No treatments have been implemented in the planning area since 2000. Wildfire has also contributed to the current age class/structure condition in the planning area. The largest fires to impact portions of the planning area include the 8,022 acre Pine Mountain Fire of 1914 and the 15,577 acre Aspen Flat Fire in 1959. Because of the time since these fires occurred, shrub conditions in those areas were not independently assessed. Table 3-7 summarizes the existing condition, specifically age class and structure, for bitterbrush. Conditions resulting from past wildfires such as the Aspen Flats and Pine Mountain fires are reflected in the table. Effects of timber sale and natural fuel reduction activities which occurred prior to 1990 are also assumed to be represented in the existing conditions displayed in the table. Areas which had management activities implemented since 1990 were considered to have moved age class/structure into the early seral category. Table 3-7 Bitterbrush Age Class/Structure Distribution, Opine Planning Area Winter Range Age Class / Structure (acres / % of Shrub Acreage) Habitat Unit or LRMP allocation Early 35 No Bitterbrush Mid Late Decadent (acres/% of gross acreage) 34 Total Ac /% of Project Area General Forest 464 / 48% 150 / 16% 130 / 13% 223 / 23% 5 /
AFFECTED ENVIRONMENT & ENVIRONMENTAL CONSEQUENCES CHAPTER 3 contain regeneration. Xeric shrublands do not provide hiding cover as currently defined. Areas of tall shrubs do provide camouflage cover, especially in areas of rolling topography. Tables 3-8 and 3-9 display the effects of proposed vegetation and fuel reduction treatments on hiding cover under each of the action alternatives. Table 3-8, displays the effects across the entire planning area. Table 3-8 Effects of Fuel Reduction and Vegetation Treatments on Planning Area Wide Deer Hiding Cover Acres Hiding Cover Quality Fuel Treatmen t Prescripti on Veg Treatmen t Prescripti on Hiding Cover (Gross Acres) 36 Alternative 2 Alternative 3 Net Reducti on w / 10% Retentio n (Net Acres) 3-13 Acres Convert ed to Other Type (Gross / Net Acres) Hiding Cover (Gross Acres) 36 Net Reducti on w / 20% Retentio n (Net Acres) Acres Convert ed to Other Type (Gross / Net Acres) Good -- MTT 508 457 -- 442 354 -- Good -- STT 125 113 -- 213 97 -- Good Burn -- 21 -- 21 / 11 marginal 10 -- 10 / 6 / marginal Good Burn MTT -- -- -- 7 6 -- Good Burn STT -- -- -- 13 10 -- Good Pre-Treat, Burn -- 255 229 -- 298 239 -- Good Pre-Treat, Burn MTT 902 812 -- 347 278 -- Good Pre-Treat, Burn STT 637 573 -- 1,142 914 -- Good Pre-Treat, Mow -- 8 7 -- 4 3 -- Good Pre-Treat, Mow MTT 17 15 -- 9 7 -- Good Pre-Treat, Mow STT 6 2 -- 18 14 -- Marginal -- MTT 407 184 -- 505 195 -- Marginal -- STT 156 70 -- 196 79 -- Marginal Burn -- 388 194 -- 116 47 -- Marginal Burn MTT 125 57 -- 109 44 -- Marginal Burn STT 81 37 -- 143 58 -- Marginal Pre-Treat, Burn -- 612 275 -- 480 192 -- Marginal Pre-Treat, Burn MTT 357 161 -- 698 160 -- Marginal Pre-Treat, Burn STT 392 176 -- 416 187 -- Marginal Mow -- -- -- -- 28 0 -- Marginal Pre-Treat, Mow -- 43 20 -- 28 12 -- Marginal Pre-Treat, Mow MTT 15 7 -- 18 8 -- Marginal Pre-Treat, Mow STT 5 3 -- 16 7 -- 36 Hiding cover acres under both action alternatives reflect the number of cover acres within treatment units only. Total estimated existing number of acres of good or marginal hiding cover is estimated at approximately 5,627 acres. Alternative 2 does not have activities prescribed in approximately 570 acres of existing cover; Alternative 3 does not treat approximately 724 acres of existing cover.
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United States Department of Agricul
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Abstract: The Opine Planning Area i
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PROJECT LOCATION CHAPTER 1 Figure 1
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PURPOSE AND NEED CHAPTER 1 commerci
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PLANNING DIRECTION - MANAGEMENT ALL
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PLANNING DIRECTION - MANAGEMENT ALL
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OTHER PLANNING DIRECTION & STRATEGI
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OTHER PLANNING DIRECTION & STRATEGI
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ANALYSIS ISSUES CHAPTER 1 The Opine
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ANALYSIS ISSUES CHAPTER 1 overstock
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ANALYSIS ISSUES CHAPTER 1 Soils The
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ALTERNATIVE DESCRIPTIONS CHAPTER 2
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AFFECTED ENVIRONMENT & ENVIRONMENTA
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AGENCIES AND PUBLICS CONSULTED CHAP
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Environmental Assessment

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