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ig <br />C <br />The potential for occurrence of plant and animal species listed as threatened or endangered <br />within the existing creek corridor is low (Environmental Science Associates 1993). <br />The grasslands adjacent to Littlejohn Creek were investigated for positive wetland indicators <br />► + but did not qualify as wetlands (Jones & Stokes Associates, Inc. 1995). <br />As observed during a field visit on May 10, 1995, the steep slopes in the project area were <br />largely unvegetated; however, some patchily distributed weedy vegetation was found including soft <br />chess (Bromus hordeaceous), ripgut brume (Bromus diandrus), cocklebur (Xanthium stromarium), <br />lippia (Phyla nodiflora), and bermuda grass (Cynodon dactylon). Although some of this sparse <br />vegetation was dominated by hydrophytic vegetation at the toe of the slope, hydric soil and wetland <br />hydrologic conditions were not evident above the ordinary high-water mark. The dominance of <br />hydrophytic vegetation at the lower part of the slope is probably the result of high flows during winter. <br />(Jones & Stokes Associates, Inc. 1995.) <br />Herbaceous riparian vegetation occurred below the ordinary high-water mark. Dominant <br />species include water primrose (Ludwigia peploides ssp. montevidensis) and waterpepper (Polygonum <br />hydropiperoides); parts of these plants float on the water surface. Other dominant species include rice <br />j cutgrass (Leersia orywides) and baltic rush (Juncos balticus). All four species are classified as <br />obligate wetland plants (Reed 1988). <br />C <br />scatteredWoody riparian species, consisting of mostly saplings approximately 8-10 feet tall, are <br />throughout the length of <br />willowsordinary high-water mark. In May, several that were uprooted• <br />found•• _ maintenance for flood <br />protection, , probably be • r The channel's slopes probably lack mature ri <br />rian <br />trees and shrubs because of maintenance for flood protection and erosion prevention and as a result <br />of shallow soils. A few larger trees grow outside of the stream channel. Most riparian trees are <br />willows (Salix sp.), including black willow (Salix goodingd) and arroyo willow (Salix lasiolepis), with <br />two Oregon ash (Fraxinus latifolia), three cottonwood (Populus ftemontii), two tree of heaven <br />(Ailanthus altissima), • eight•.! (Quercus lobata).• •'Associates, <br />•• <br />Wetland Mitigation and Monitoring Plan for the Chapter 2. Existing Conditions <br />Austin Road landfill Expansion. <br />U. S. Army Corps of Engineers File 199400974 <br />City of Stockton 2'3 April S. 1996 <br />