Vantage to Pomona FEIS Index 34 - Laserfiche WebLink

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Vantage to Pomona Heights Chapter 4 230 kV Transmission Line Project FEIS Environmental Consequences PAGE 4-47 Alternative F General Vegetation Long-term disturbance to approximately 209.7 acres of land (Table 4.2-6) would occur with the construction of Alternative F. The long-term disturbance would occur within 170.9 acres of sagebrush/perennial grassland, 26.5 acres of annual grassland/noxious weeds, 0.8 acre of intermittent stream/dry gully, 4.9 acres of perennial grassland, 3.0 acres of rabbitbrush annual grassland, 0.3 acre of riparian/wetland, 0.6 acre of rock/basalt cliff, and 2.8 acres of sagebrush annual grassland. Approximately 84.0 acres of vegetation would be temporarily disturbed. Disturbance would be minimized by RDFs described above that are designed to reduce impacts to vegetation resources. Vegetation impacts for Alternative F are anticipated to be: no identifiable for 12.0 miles; low for 22.5 miles, and moderate for 30.9 miles. Of the nine Action Alternatives, Alternative F has among the highest vegetation impacts at the moderate level. Special Status Species and Priority Ecosystem Alternative F crosses 9.6 miles of WNHP special status plant polygons, 1.1 miles of special status plant occurrences found during Project-specific surveys, and 3.8 miles of WNHP priority ecosystems (Table 4.2-7). With Alternative F, long-term disturbance to special status species potential habitat would occur to 30.6 acres of suitable, 20.6 acres of marginal, and 11.5 acres of unsuitable habitat. Long-term disturbance to special status plant species, potential suitable habitat, and WNHP priority ecosystems for Alternative F is anticipated to include 10.8 miles of no identifiable, 17.6 miles of low impacts, and 37.0 miles of moderate impacts. Of the nine Action Alternatives, Alternative F has among the highest impacts to special status plant species, potential suitable habitat, and WNHP priority ecosystems at the moderate level. Alternative G General Vegetation Long-term disturbance to approximately 139.7 acres of land (Table 4.2-6) would occur with the construction of Alternative G. The long-term disturbance would occur within 105.7 acres of sagebrush/perennial grassland, 26.7 acres of annual grassland/noxious weeds, 0.1 acre of intermittent stream/dry gully, 4.1acres of perennial grassland, 0.9 acres of rabbitbrush annual grassland, 0.4 acre of riparian/wetland, 0.2 acre of rock/basalt cliff, 0.4 acres of sagebrush annual grassland, and 1.2 acres of trees. Approximately 81.9 acres of vegetation would be temporarily disturbed. Disturbance would be minimized by RDFs described above that are designed to reduce impacts to vegetation resources. Vegetation impacts for Alternative G are anticipated to be: no identifiable for 21.9 miles, low for 20.2 miles, and moderate for 21.6 miles. Of the nine Action Alternatives, Alternative G has the lowest vegetation impacts at the moderate level. Special Status Species and Priority Ecosystem Alternative G crosses 12.1 miles of WNHP special status plant polygons, 1.8 miles of special status plant occurrences found during Project-specific surveys, and no WNHP priority ecosystems (Table 4.2-7). With Alternative G, long-term disturbance to special status species potential habitat would occur to 19.3 acres of suitable, 18.8 acres of marginal, and 23.1 acres of unsuitable habitat. Long-term disturbance to special status plant species, potential suitable habitat, and WNHP priority ecosystems for Alternative G is anticipated to include 16.1 miles of no identifiable, 17.8 miles of low impacts, and 29.8 miles of moderate impacts. Of the nine Action Alternatives, Alternative G has the lowest impacts to special status plant species, potential suitable habitat, and WNHP priority ecosystems at the moderate level.