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Vantage to Pomona Heights Chapter 3 <br />230 kV Transmission Line Project FEIS Affected Environment <br />PAGE 3-21 <br />As not all land within the 150-foot corridor was surveyed, additional special status species and <br />populations could occur within the Project study area. For each route segment, potential habitat for <br />special status plants was estimated using documented vegetation cover types and desktop data <br />interpretation for areas not surveyed. Data sources for aerial interpretation included 2001 JBLM YTC <br />vegetation data (JBLM YTC 2002), GAP data, and fire history data. Based on the habitat requirements of <br />special status plants that occur or have the potential to occur within the ROW, estimated potential habitat <br />was further categorized as suitable, marginal, and unsuitable. Unsuitable habitat included: agricultural <br />land; developed, road, or firebreak; irrigation canal; open water; watered poplar/ornamental tree; and <br />noxious weeds. Marginal habitat included: annual grassland, perennial grassland, rabbitbrush/annual <br />grassland, and sagebrush annual grassland. Suitable habitat included: basalt cliff/rock, <br />sagebrush/perennial grassland, bitterbrush/perennial grassland, aspen, intermittent stream, or dry gully <br />and riparian. Table 3.2-6 presents a summary of habitat suitability by route segment. <br />Table 3.2-6 Special Status Plant Species Locations and Habitat Suitability by Route Segment <br />ROUTE SEGMENT <br />SPECIAL STATUS <br />PLANTS THAT OCCUR OR HAVE THE POTENTIAL TO OCCUR WITHIN THE ROW1 <br />HABITAT SUITABILITY (ACRES) <br />Suitable Habitat Marginal Habitat Unsuitable Habitat <br />1a/NNR-1 None <br />12.7 acres—predominately <br />sagebrush/perennial grassland, with some <br />intermittent stream/dry gully <br />19.9 11.4 <br />1b Nuttall’s sandwort and <br />snowball cactus <br />50.3 acres - predominantly <br />sagebrush/perennial grassland, with some <br />aspen and intermittent stream/dry gully. <br />149.5 28.7 <br />1c Snowball cactus <br />58.7acres - predominantly <br />sagebrush/perennial grassland, with some <br />aspen and intermittent stream/dry gully. <br />152.9 24.0 <br />2a None 2.0 acres - sagebrush/perennial grassland <br />and intermittent stream/dry gully. 16.0 0.0 <br />2b Columbia milkvetch <br />112.9 acres - predominantly <br />sagebrush/perennial grassland, with some <br />intermittent stream/dry gully and basalt <br />cliff/rock. <br />144.5 40.2 <br />2c None <br />8.5 acres - predominantly <br />sagebrush/perennial grassland, with some <br />intermittent stream/dry gully and basalt <br />cliff/rock. <br />242.7 78.6 <br />2d Awned halfchaff sedge, <br />Columbia milkvetch <br />9.9 acres - predominantly <br />sagebrush/perennial grassland, with some <br />intermittent stream/dry gully and basalt <br />cliff/rock. <br />117.7 0.8 <br />3a None 2.2 acres - sagebrush/perennial grassland. 0.0 0.8