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SECTION 2 <br />Study Area Characteristics <br />herbicides, and fecal coliform due to grazing. This category is expected to decrease from 20 <br />percent of the UGB to 9.7 percent at UGB buildout. <br />Figure 2 -4 compares the percentage of existing and projected surface cover for the UGB portion <br />of the River Road Santa Clara basin. <br />Figure 2 -4 <br />Surface Cover in the River Road Santa Clara Basin UGB <br />2.4 Landform, Topography, Slopes <br />Ninety -nine percent of the basin has slope in the 0 % -5% category. The following table is keyed <br />to Map 4, Slope and Topography, and indicates the amount of acres affected by varying <br />categories of slope steepness. <br />Table 2 -4 <br />River Road Santa Clara Basin Slone Distribution <br />Location ' <br />Surface Cover (UGB) <br />Slope Distrib <br />tion (percent <br />100 % <br />......... <br />Slopes <br />0 -5% <br />Slopes <br />6 -10% <br />.::.: <br />Slopes <br />16 -25% <br />90% <br />Total <br />Within UGB <br />80% <br />1 % <br />0% <br />0% <br />�q <br />70% <br />Outside UGB <br />99% <br />1% <br />0% <br />0% <br />0% <br />100% <br />Total Basin <br />99% <br />1% <br />0% <br />.� <br />o <br />60 /o <br />100% <br />o Pervious - Other <br />0 Pervious - Landscape <br />p <br />50% <br />U <br />El Pervious - Forest <br />40% <br />■ Impervious <br />U <br />i■ <br />30% <br />a <br />20% <br />10% <br />0% <br />Existing (2007) Buildout <br />2.4 Landform, Topography, Slopes <br />Ninety -nine percent of the basin has slope in the 0 % -5% category. The following table is keyed <br />to Map 4, Slope and Topography, and indicates the amount of acres affected by varying <br />categories of slope steepness. <br />Table 2 -4 <br />River Road Santa Clara Basin Slone Distribution <br />Location ' <br />Slope Distrib <br />tion (percent <br />Slopes <br />0 -5% <br />Slopes <br />6 -10% <br />Slopes <br />11 -15% <br />Slopes <br />16 -25% <br />Slopes <br />>25% <br />Total <br />Within UGB <br />99% <br />1 % <br />0% <br />0% <br />0% <br />100% <br />Outside UGB <br />99% <br />1% <br />0% <br />0% <br />0% <br />100% <br />Total Basin <br />99% <br />1% <br />0% <br />0% <br />0% <br />100% <br />0:\25695978 Eugene RR -SC Final Basin P1an\Master P1anTINAL 2- 2010\Master_Plan 3- 11- 10_FINAL_ Word _Version.doc 2 -13 <br />