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Vantage to Pomona Heights Chapter 4 230 kV Transmission Line Project FEIS Environmental Consequences PAGE 4-27 corridor. Impacts from the proposed Project are similar to those described above for Nuttall’s sandwort. With the implementation of RDFs described above and the assumption that potential occurrences would be spanned and avoided, Project construction, operation, and maintenance activities could impact individuals or habitat (moderate impact), but would not contribute a trend toward federal listing. Kalm’s Lobelia Kalm’s lobelia is a BLM Strategic and Washington Endangered species. Kalm’s lobelia occurs from Newfoundland to Pennsylvania, west to British Columbia, and Colorado to Hudson Bay and the southern Mackenzie District. In Washington, it occurs in Yakima County. Within the region, Kalm’s lobelia is known from one population occupying approximately 92 acres. WNHP data indicates that one Kalm’s lobelia occurrence intersects Route Segment 3b for 0.3 mile. Kalm’s lobelia has been documented along the Columbia River near Alkali Canyon Creek and Borden Springs. The primary threats to this species include habitat degradation from livestock, weedy species and altering the flow of the natural spring (WNHP and BLM 2005). Impacts from the proposed Project are similar to those described above for Nuttall’s sandwort. With the implementation of RDFs described above and the assumption that potential occurrences would be spanned and avoided, Project construction, operation ,and maintenance activities could impact individuals or habitat (moderate impact), but would not contribute a trend toward federal listing. 4.2.4.10 Route Segment 3c General Vegetation Construction of Route Segment 3c would result in the long-term disturbance to approximately 59.5 acres of land (Table 4.2-4). Over three-quarters of the disturbance (49.6 acres) would occur in areas classified as sagebrush/perennial grassland. The remaining disturbance would occur in areas classified as annual grassland (3.8 acres), rabbitbrush/annual grassland (2.4 acres), riparian/wetland (0.3 acre), sagebrush/annual grassland (2.8 acre), and rock/basalt cliff (0.6 acre). Short-term disturbance would occur to approximately 22.0 acres of vegetation. General vegetation impacts are similar to those described above for Route Segment 1a/NNR-1. Disturbance would be minimized by RDFs described above that are designed to reduce impacts to vegetation resources. RDFs include using existing public roads to access structure sites, minimizing blading and disturbance to plant communities, revegetating following construction, and implementing a Noxious Weed and Invasive Plant Management Plan. Refer to Section 2.3 - Required Design Features Common to Action Alternatives for a complete list and description of RDFs. Impacts for Route Segment 3c are anticipated to be: 9.2 miles of no identifiable, 6.0 miles of low, and 10.1 miles of moderate. Special Status Species and Priority Habitats No federally listed plant species are known to occur along Route Segment 3c. WNHP data on special status plant occurrences indicate that Route Segment 3c intersects awned halfchaff sedge, Columbia milkvetch, gray cryptantha, hairy bugseed (Corispermum villosum), and Hoover’s desert-parsley. These locations include large buffers, so it is difficult to accurately determine whether these occurrences truly intersect the ROW corridor. In addition, the following species are within one mile of Route Segment 3c: annual sandwort, beaked spike-rush, caespitose evening-primrose, Columbia cress (Rorippa columbiae), fuzzytongue penstemon (Penstemon eriantherus var. whitedii), Geyer’s milkvetch, Great Basin gilia, Piper’s daisy, Nuttall’s sandwort, Snake River cryptantha (Cryptantha spiculifera), Wanapum crazyweed (Oxytropis campestris var. wanapum), and Wormskiold’s northern wormwood. Ninety-nine percent (179.8 acres) of federal lands within this route segment were surveyed for special status plants; however, the majority of Route Segment 3c is comprised of non-federal land (308.7 acres)