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B-35 <br /> Keenesburg Project RETTEW Project No. 114782000 <br /> Colorado Sand Company LLC April 2019 <br /> 4.3 Soil Bore Logs <br /> Exploratory soil borings were completed within the southwest quarter of Section 12 and are depicted on <br /> the Soils Map provided in Appendix A, Figure 3. Detailed bore logs are provided in Appendix F. Borings <br /> were completed to determine soil profiles, moisture content,groundwater depths, and bedrock depths. <br /> 5.0 VEGETATION <br /> During the field investigation, vegetation data was collected at the sample points depicted on the aerial <br /> basemap provided in Appendix A, Figure 2, and recorded on sample data forms provided in Appendix C. <br /> Vegetation across the site is primarily composed of various grasses, prickly pear, and sand sagebrush. <br /> Trees are largely absent within the project area,with the exception of a small grove of Russian olive trees <br /> in the far southeast corner of the section. The majority of project area consists of grazed grasslands <br /> containing patches of sagebrush and a significant amount of bare ground (30 to 70 percent). Shrub cover <br /> ranged from 0 to 30 percent cover. Sample points 1—4 were located within this grazed upland habitat. <br /> The landscape generally appears as a relatively homogenous landscape. However, one drainage (Ennis <br /> Draw) runs through the west half of the project area. Vegetation within portions of this drainage, <br /> especially those areas containing ponded water and saturated soils, was distinctly different from the <br /> surrounding upland areas and was documented by sample point W1. Wetlands were documented within <br /> Ennis Draw at this sample point. A summary of the plant species identified at each sample point is <br /> provided in Table 5.1 below. Root depth at each sample point was approximately six inches deep. <br /> Table 5.1-Vegetation species at each sample point. <br /> Sample Point <br /> Species 1 2 3 4 W1 <br /> Shrub Stratum <br /> Sand sagebrush (Oligosporus filifolius) • • <br /> Twistspine prickly pear(Opuntia <br /> macrorhiza) <br /> Herb Stratum <br /> Blue grama grass(Condrosum gracile) • <br /> Water sedge (Corex aquatilis) • <br /> Cheatgrass(Bromus tectorum) • • • • <br /> Intermediate wheatgrass (Thinopyrum <br /> • <br /> intermedium) <br /> Western wheatgrass(Pascopyrum smithii) • • <br /> Little bluestem (Schizachyrium scoparium) • <br /> Common threesquare (Scoenoplectus <br /> pungens) <br /> Saltgrass(Distichlis spicata) • • <br /> Indian ricegrass(Oryzopsis hymenoides) • • <br /> Additional information for each sample point can be found on the sample point data forms contained in <br /> Appendix B. <br /> 9 <br /> Keenesburg Project—Limited Impact 110 Application_May 24,2019 <br />