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Tabl� I-5.6 SCS RunoffCurveNumtxrs <br />LAND USE <br />Land <br />�oen area <br />Meadow or pas�ucc <br />�-- <br />Wood orforestland <br />)pen spaces (lawns, parks, <br />;alf courses, landscaping, etc.) <br />iood condition <br />?air condition <br />3ravel roads and parking lots <br />Dirt roads and parking lots <br />[mpervio�s surfaces <br />Qpen water bodies <br />Single fiamily residential (1) <br />Dwelling UniUGross Acre <br />I.0 <br />1.5 <br />2.0 <br />2.5 <br />3.0 <br />3.5 <br />4.0 <br />4.5 <br />5.0 <br />5.5 <br />6.0 <br />6.5 <br />7.0 <br />pRD's, multi-family; <br />��mmercial. industr:al <br />winter condition <br />low growing brush � <br />undisturbed <br />youn_g saco�d <br />with cover crc <br />or brush <br />grass cover on >75% of area <br />arass cover �n 50-75% of area <br />ent, roofs, etc. <br />--_----- <br />wetlands, ponds, etc. <br />°�o Impervious <br />15 <br />ZO <br />25 <br />70 <br />34 <br />38 <br />42 <br />Sb <br />48 <br />5� <br />52 <br />54 <br />56 <br />CURVE NUMisnx� n i <br />HYDROLOGIC SOIL GROUP <br />A B C D <br />g� g1 94 95 <br />74 82 89 92 <br />65 78 85 89 <br />q2 64 76 8� <br />55 72 81 86 <br />g� gg 92 94 <br />68 80 86 <br />77 85 90 <br />76 85 89 <br />72 82 87 <br />98 98 98 <br />]00 1-1�0 <br />Separate curve <br />numbers must <br />be selected for <br />pervious and <br />impervious <br />portions of' the <br />site cr basin <br />90 <br />92 <br />91 <br />98 <br />100 <br />(1) The % impervious values assume that roof and driveway runoff is directed into the streedstorm system <br />1-5-33 <br />