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Vantage to Pomona Heights Chapter 3
<br />230 kV Transmission Line Project FEIS Affected Environment
<br />PAGE 3-25
<br />individuals throughout 5.4 acres and the occurrence along Route Segment 3b contained approximately
<br />158 individuals throughout 2.4 acres. As the entirety of all route segments were not surveyed, Columbia
<br />milkvetch could be present elsewhere.
<br />Dwarf Evening-Primrose
<br />Dwarf evening-primrose (Eremothera pygmaea) is a BLM Sensitive and Washington Sensitive species. It
<br />is a regional endemic known from eastern Washington, eastern Oregon, and Idaho. In Washington, it is
<br />known to occur in Benton, Douglas, Franklin, Grant, and Kittitas counties. Within the region, nineteen
<br />populations are known to occur occupying 6,564 acres. Primary threats to dwarf evening-primrose
<br />include resource extraction, road construction, herbicide drift, and invasion of non-native species (WNHP
<br />and BLM 2005; Camp and Gamon 2011).
<br />WNHP data indicate that dwarf evening-primrose intersects Route Segment NNR-7 and NNR-8 for
<br />approximately 0.5 mile. However, special status species locations include large buffers, so it is uncertain
<br />whether this occurrence intersects the ROW. As the entirety of all route segments were not surveyed,
<br />dwarf evening-primrose could be present elsewhere.
<br />Gray Cryptantha
<br />Gray cryptantha (Cryptantha leucophaea) is a federal SOC, BLM Sensitive, and Washington Sensitive
<br />species. It is endemic to the Columbia and Lower Yakima Rivers in Washington and Oregon. In
<br />Washington, it is known to occur in Benton, Franklin, Grant, Kittitas, Walla Walla, and Yakima counties.
<br />Thirty-three populations occupying 16,169 acres are known to occur. Primary threats to gray cryptantha
<br />include OHV use and competition from invasive and noxious weeds (WNHP and BLM 2005; Camp and
<br />Gamon 2011).
<br />WHNP data indicate that gray cryptantha intersects Route Segments 3b, 3c, NNR-7, and NNR-8 for
<br />approximately 5.4 miles. However, special status species locations include large buffers; therefore, it is
<br />uncertain whether this occurrence intersects the ROW. As the entirety of all route segments were not
<br />surveyed, gray cryptantha could be present elsewhere.
<br />Hairy Bugseed
<br />Hairy bugseed (Corispermum villosum) is a Washington Sensitive Species. This species is found in
<br />Colorado, Minnesota, Missouri, Montana, Nebraska, Nevada, North Dakota, Washington, Wisconsin,
<br />Wyoming, most Canadian provinces, and Washington including Grant County (NatureServe 2015). At the
<br />regional level, three populations occupying approximately 1,267 acres are known to occur. Threats are
<br />not documented, but are presumed to be similar to sensitive species in sandy habitats, including OHV use,
<br />increased weed invasions, changes in sand deposition, and agricultural conversion.
<br />WHNP data indicate that hairy bugseed intersects Route Segment 3c for approximately 0.6 mile;
<br />however, special status species locations include large buffers; therefore, it is uncertain whether this
<br />occurrence intersects the ROW. As the entirety of all route segments were not surveyed, hairy bugseed
<br />could be present elsewhere.
<br />Hoover’s Desert-Parsley
<br />Hoover’s desert-parsley is a federal SOC, BLM Sensitive Species, and a Washington Sensitive species.
<br />This species is known to occur only in Washington, with 22 populations occurring in Yakima County and
<br />adjacent portions of Benton, Grant, and Kittitas counties. Habitat for Hoover’s desert-parsley consists of
<br />loose rocky slopes and basalt drainage channels at elevations from 600 to 2,300 feet. The greatest threats
<br />to Hoover’s desert-parsley include gravel extraction, road construction, military training activities, and
<br />grazing (Camp and Gamon 2011).
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