DOE/EIS-0332; McNary-John Day Transmission Line Project Draft ...

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3 3-50 Affected Environment, Environmental Consequences, and Mitigation Loss of the cryptogamic crusts could result in an increase in soil erosion and decreased soil nutrient and water retention. Reestablishment of the cryptogamic crust component in higher quality shrub-steppe is a long-term process, and can take from 7 to 100 years, depending on the complexity of the species association within a given area of cryptogamic crust (PALS 1997). Removal or disturbance of higher quality shrub-steppe communities along the project corridor would be a notable impact for the following reasons. � Disturbance of these areas would provide an opportunity for invasion by cheatgrass and other nonnative species. Adjacent grasslands provide a seed source for cheatgrass invasion. Moreover, cheatgrass has a competitive advantage over native bunchgrasses, which are an important component of shrub-steppe associations in the project area. � Restoration of native shrub-steppe communities would require long-term intensive maintenance to control invasive species. � Restoring the native shrub and grass component of the higher quality shrub-steppe would be only one component of recovering these communities. Restoration of the cryptogamic crust component and support for the animals that utilize shrub-steppe communities would be long-term processes tied to reestablishment of the shrubsteppe. Environmental Consequences—Short-Line Routing Alternatives Table 3-16 summarizes the vegetation impacts associated with the short-line routing alternatives. Table 3-16: Impacts of Short-Line Routing Alternatives: Vegetation Alternative Impacts McNary Substation Alternatives A. Relocate administration building presently located on north side of substation adjacent to Wildlife Natural Area B. Cross Wildlife Natural Area; circumvent administration building on north side Approximately 2 acres of permanent impact to grassland communities for the new location of building. Cottonwood trees and some vegetation would be removed for tower sites and conductor clearance. These cottonwoods are somewhat unique given the dry conditions that prevail over most of the route. The are supported by a local seep. Since the seep will not be altered, similar moisture-dependent woody species will likely regenerate in the areas where cottonwoods are cut. BPA McNary-John Day Transmission Project Draft EIS February 2002
Alternative Impacts C. Place line in bus work at ground level on north side of administration building, inside Wildlife Natural Area Hanford-John Day Junction Alternatives A. Move existing Hanford- John Day line north 200 feet to make room for new line on north side of corridor B. Place new line on south side of corridor (occupied by roads and towers) C. Place new line on south side of highway Corridor Mile 32 Alternatives A. Keep existing and new lines on tribal land B. Relocate existing and new lines away from tribal land Corridor Mile 35 Alternatives A. Keep existing and new lines on tribal land B. Relocate existing and new lines away from tribal land BPA McNary-John Day Transmission Project Draft EIS February 2002 Approximately 0.7 acre of permanent impact to grassland communities for construction, operation and maintenance of 1,600 feet of bus work. Vegetation Less than 1 acre of temporary construction impacts for six relocated towers, 1.2 acres of temporary impacts from new access road construction, and 0.6 acre of permanent impact from new access road operation and maintenance. 0.5 acre of temporary construction impacts for up to two additional towers; 0.1 acre of permanent impacts for two additional towers ; 3.1 acres of impacts resulting from construction and operation and maintenance of new access roads; removal of up to 12 trees-ofheaven (Ailanthus altissima). 0.5 acre of temporary construction impacts for up to two additional towers; 0.1 acre of permanent impacts for two additional towers ; 6.2 acres of impacts resulting from construction and operation and maintenance of new access roads; removal of up to 12 trees-ofheaven (Ailanthus altissima) 0.75 acre of temporary construction impacts for three new towers; 0.15 acre of permanent operation and maintenance impacts for three new towers; 0.42 acre of impacts resulting from construction, operation and maintenance of new access roads to three new towers. All impacts would occur in agricultural land. 2.25 acres of temporary construction impacts for nine new towers; 0.5 acre of permanent operation and maintenance impacts for nine new towers; 1.26 acres of impacts resulting from construction, operation and maintenance of new access roads to nine new towers. All impacts would occur in agricultural land. 1.0 acre of temporary construction impacts for four new towers; 0.2 acre of permanent operation and maintenance impacts for four new towers; 0.57 acre of impacts resulting from construction, operation and maintenance of new access roads to four new towers. All impacts would occur in grazed shrub-steppe. 2.0 acres of temporary construction impacts for eight new towers; 0.4 acre of permanent operation and maintenance impacts for eight new towers; 1.14 acres of impacts resulting from construction, operation and maintenance of new access roads to eight new towers. All impacts would occur in grazed shrub-steppe. 3-51
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McNary-John Day Transmission Line P
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ii Maintenance.....................
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List of Figures S-1 Vicinity Map ..
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3-17 Sensitive Wildlife Species Pot
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Summary problem of lack of power, p
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BPA McNary-John Day Transmission Pr
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Alternatives BPA McNary-John Day Tr
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Mitigation BPA McNary-John Day Tran
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Environmental Consequences—Propos
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Vegetation Affected Environment BPA
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Operation and Maintenance BPA McNar
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Cultural Resources Affected Environ
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Socioeconomics, Public Services, an
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Transportation Affected Environment
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Environmental Consequences—Propos
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Table S-2: Summary of Impacts of Sh
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Transmission Infrastructure BPA McN
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Plymouth Generating Facility BPA Mc
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Chapter 2 Proposed Action and Alter
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2 2-2 Proposed Action and Alternati
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2 2-10 Proposed Action and Alternat
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Table 2-3: Summary of Impacts and M
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3 3-100 Affected Environment, Envir
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Noise BPA McNary-John Day Transmiss
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Chapter 5 References Printed Refere
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StreamNet. 2001. StreamNet: Fish Da
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State Senator and Representatives J
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Media East Oregonian (Pendleton) Go
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Chapter 7 List of Preparers The McN
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Galan McInelly—Geologist. Respons
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Chapter 8 Glossary and Acronyms Glo
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Pithouse: a semi-subterranean “ea
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Ecology Washington State Department
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Appendix A Agency Correspondence an
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BPA Tribal Policy April 1996 It is
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8. Strive to develop and achieve mu
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• Provide assistance in establish
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> > > Chris Soncarty > Fisheries Bi
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Appendix B Public Involvement � L
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Most of the comments (45%) focused
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We do not plan to give a formal pre
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Mtg1 1 Need What is driving the nee
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Letter 1 Need The Pacific Northwest
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Mtg1 1 Need Nuclear is safe. Mtg1 1
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Mtg1 1 Process What happens if I do
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Mtg2 2 Alternatives What about goin
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Mtg1 2 Construction We have telepho
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Mtg2 2 Description Will this line b
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Letter 3 Cultural Resources Mtg1 3
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Mtg1 3 E-social Feel sorry for folk
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Mtg2 3 Landuse I'll need to remove
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Mtg1 3 Public Health We get shocked
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Form 3 Vegetation I am distressed t
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Mtg1 3 Wildlife Needs mitigation fo
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Appendix C Common and Scientific Na
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Appendix D Common and Scientific Na
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D D-2 Common and Scientific Names o
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Appendix G Electric and Magnetic Fi
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Bonneville Power Administration/ Mc
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Table of Contents Bonneville Power
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1.0 Introduction Bonneville Power A
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Bonneville Power Administration/McN
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List of References Cited Bonneville
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List of Preparers Bonneville Power
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Table 2, continued Bonneville Power
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Table 2, continued Bonneville Power
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Figure 1, continued c) Proposed lin
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Figure 1, continued Bonneville Powe
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Index 1 100-year floodplain .......
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Glade Creek.......S-9, S-12, 3-8, 3
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scoping .................S-7, 1-4,
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DOE/EIS-0332; McNary-John Day Transmission Line Project Draft ...

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