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I• <br />• <br />• <br />SCS table <br />LSbie 8.Ib Runoff Curve Ntmtbas for Selected Land Uses (Soil Conservation Service, 1986) <br /> <br />Lsndusedescription ~ <br />A' Hydrologic Soil group <br />B ~~ <br />D <br />CnldvatW land° <br />Without eortservatioa trcatatrnt 72 8! 88 9t <br />Vrm conservation tteamserst 62 71 7$ 81 <br />Pasture or rarsge land <br />Poorcortdition ~ b8 79 85 89 <br />Good oorditioa 39 b! 74 80 <br />Meadow <br />l'nood comlhion 30 58 71 78 <br />Wood or fruest laud <br />7bin shawl, poor COVer,aq molds 4s bb 77 83 <br />flood covcs° 25 SS 70 77 <br />4prn Spas, lawns, parka, golf worsen, cemeteries. ere. <br />Good eorulitiaa {gars wvsr oa 75%or mere of the area) 39 bt 7a 8D <br />FavoaadiNon (grass cover m 50 to 7S%of dte area) 49 69 79 Ba <br />Commercial and business axu (85%impervious) 89 92 94 9S <br />Indusuial districts (72% imperviasS) <br />id <br />i <br />t` 81 88 41 93 <br />Res <br />cnt <br />a <br />Average lot slu Average peranuge impervtstus° . <br />t acre or kss 65 77 $s 90 92 <br />}acre - 36 bt 7s 63 87 <br />!acre 3o s7 n $t $b <br />}acre zs sa 7o sa $s <br />I acre 20 51 . 68 79 8a <br />Paved pasting hNa. roofs, dmawaya, etct 98 98 ~ 98 98 <br />Boccie and roads <br />Paved with cssrDS s~ steam rowers' 98 9$ 98 98 <br />Gravel 76 85 89 91 <br />Din 72 ffi 67 89 <br />°Ear a more detailed description of agricultural and lard trx curve numbers refer W "tiatiooal <br />Enguseaing Hmdbook," Secs. 4. ^Hydaology" Chap. 9.1472. <br />aGood cover is proteacd from grazing, lluw, and Mush cover soil. <br />`Carve numbers are cmnpsued assuming the runoff from the tease and driveway is dfrected toward the <br />street with a minimum of roof rosier dlraxed to lawns wtxse additional btRltratiats could aww <br />°ilse remaining pervious erase flown) are wruidewd to 6e in gwd pasture c~dltion for thew crave <br />raambera. <br />•tn some warmer dimatea of the caunvy a ewve numbu qt 95 may be used. <br />REVISED MARCH 2006 <br />Attachment 2.05.3(3)-14-3 <br />