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<br />CHAPTER 4. ENVIRONMENTAL CONSEQUENCES
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<br />sensitive species were discovered during intensive search efforts in the vicinity of the reservoir (see
<br />Section 3.7).
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<br />4.7.2 Direct and Indirect Impacts
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<br />4.7.2.1 AllBrnBlivB .A . No Aclion
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<br />Under Alternative A, the project area would remain in its existing state supporting current land uses.
<br />Impacts of the existing reservoir on the vegetation resources have already been realized and would
<br />not be expected to change in the foreseeable future barring any unforeseen site developments or
<br />alterations in recreation or grazing policy.
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<br />4.7.2.2 AllBrnllivB B . ProposBd RusBrvoir Explnsion
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<br />Assuming implementation of Alternative B, the primary impact to the vegetation resources would
<br />be the inundation of a portion of each of those communities proximal to the reservoir. The acreage
<br />which would be lost due to inundation is presented on Table 4-5, Potential Disturbed Acreage By
<br />Vegetation Type. Therefore, as noted in this table, 51.4 acres ofvegetation would be lost as follows:
<br />15.0 acres (29%) of wetland, 19.1 acres (37%) of upland meadow, 12.0 acres (23%) of mixed conifer,
<br />and 5.3 acres (11%) of previously disturbed ground. The proposed borrow source, area A-I, would
<br />affect 35.9 acres, however, about three-quarters of this acreage would be inundated. The remaining
<br />one-quarter, is predominantly upland meadow with some mixed conifer. Finally, the proposed
<br />powerline would potentially affect an additional 2.2 acres of vegetation located along the Fish Creek
<br />Access Road. Any of the three road corridor options would affect about one and one/half acres.
<br />In total, the proposal would disturb approximately an additional 71 acres of vegetation (including
<br />5.5 acres of previous disturbance) over current conditions.
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<br /> . TABLE 4-5 . .
<br />POTENTIAL DISTtJRllED AcREAGE BY VEGETATION TYPE
<br /> Wetland. Upland . Mixed Disturbed . Tol:l.1
<br /> Meadow Conifer Are.. Acreage
<br />ALTERNATIVES
<br />Alternative A . No Action 0.0 0,0 0.0 0.0 0.0
<br />Alternative B - Propo.sed Reservoir ExpamioD 15.0 19.1 12.0 5,3 51.4
<br />Alternative C - Smaller Reservoir Expansion 8.8 10.8 6.1 3.8 29.5
<br />BORROW AREA OPTIONS
<br />Borrow Are. A-I - (Altern>!ive B) 12.3 12.0 7.9 3.7 35,9
<br />Borrow Are. A-I - (Altern>!ive C) 6.6 10.7 6,3 2.2 25,8
<br />Borrow Are. A-2 0,0 0.7 2.3 0,0 3.0
<br />Borrow Area B 0.0 9.5 13.7 0.2 23.4
<br />CAMPGROUND
<br />Campground Relocation Site 1 I 0.0 I 3,3 3,6 I 0.0 I 6.9
<br />Cunpground Reloution Site 2 0.0 I 0.5 4,8 I 0.0 I 5,3
<br />ROAD CORRIDOR OPTIONS
<br />Ro.d Option 1 0.04 0.24 1.21 0.00 1.49
<br />Ro.d Option 2 0,37 0.50 0.82 0.00 1.69
<br />Ro.d Option 3 0.48 0.40 0.71 0,02 1.61
<br />POWERLINE 0.09 0.97 0.91 0,21 2.18
<br />.Mos( of the proposed disturbance to borrow area At would be inundated and, therefore. is DOt additive with
<br />other disrurbwces.
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<br />September 1993
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<br />Page 4.23
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