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Tablc I-i.G SCS RunoffCune Numbers <br />LAND USG DESCRIPTION CURVE NUMBERS Bl' <br />HYDROLOGICSO GROUP <br />A B C D <br />Culti�•atcdLand ��intcrcondition �b ll )�l 9� <br />Mountain opcn area lo�� t�ron•ing brush K erasslands 74 82 R9 92 <br />Mcado�3� or pasturc G� 7R 8j 89 <br />VVood or forest ]�nd undishirbed 42 G3 76 81 <br />voun sccond cro��th or brush » 72 81 86 <br />Orchard �aith cover cro 81 li8 92 94 <br />Opcn spaccs (la��ns, parks, <br />golfcourses, landscaping, ctc.) <br />Good condition grass covcr on >7�% of arca 68 RO K6 90 <br />Fair condition Grass covcr on �0-7�% of arca 77 Sj )0 92 <br />Gravel roads and parking lots 76 8� 89 91 <br />Dirt roads and pnrking lots 72 R2 87 R9 <br />Impen�ious surfaces a��ement. roofs. ctc. 9R 98 9R 98 <br />Open �eater bodics lakes. �vetlands, ponds, etc. 100 100 100 100 <br />Single famih• residential (1) <br />D�cclling UniUGross Acre "„ Impervious <br />1.0 1 i Scparatc curvc <br />LS 20 numbers mu�. <br />2.0 2> be selected for <br />2.� 30 pcn�ious and <br />3.0 3d impervious <br />3.� 3R portions of thc <br />4.0 42 sitc or basin <br />4.� 46 <br />s.o ax <br />s.; so <br />�.o sz <br />�,.s ;a <br />�.o s� <br />PRD's, multi-famil}•. <br />commercial. industnal <br />(I) Tlie Y/� impen�ious �'alues assume that roof and dnve�v;�J• runoffis dirccted into the sveeds[orm system <br />1_i_3_ `-� <br />