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TABLE 2. Runoff Curve * bers for Hydrologic Soil -Cover Complexes <br />(Antecedent Moisture Condition II. and la ■ 0.2 S) <br />Land Use Description /IYeatwent/Hydrolo =ie Condition Hydrologic Soil Group <br />Residential:) A S C D <br />Average lot size Average 5 Isp+erviousl <br />1/6 acre or less 65 61 BS 80 87 <br />1/3 acre <br />1/3 sera 30 57 72 81 86 <br />1/2 sere 25 54 70 80 8S <br />1 acre 20 51 68 79 84 <br />Paved parking lots, roofs. driveways. etc.11 98 98 9S 98 <br />Streets and roads: <br />paved with curbs and stow sewers) 96 96 OS 96 <br />gravel 76 95 89 91 <br />r 72 82 87 89 <br />Commercial and business areas (S55 impervious) 89 92 94 • 9S <br />• <br />Industrial districts (725 impervious) 81 86 91 93 <br />Open Spaces, lawns, parks. golf courses, ceoeteries.etc. <br />good condition: grass cover on 75% or more of the area 39 61 74i SO <br />fair condition: grass cover on SO% to 755 of the area 49 69 79 84 <br />Fallow Straight row -- 77 86 91 94 <br />Row crops row Poor 72 81 88 91 <br />StraigStraight <br />row Good 67 78 8S 89 <br />Contoured Poor 70 79 14 8i <br />Contoured Good 65 75 12 86 <br />Contoured 8 terraced Poor 66 74 SO 82 <br />Contoured 4 terraced Good 62 71 78 81 <br />Small grain Straight row Poor 6S 76 84 88 <br />Good 63 75 83 87 <br />Contoured Poor 63 74 82 85 <br />Good 61 73 81" 84 <br />Contoured 4 terraced Poor 61 72 79 82 <br />Good S9 70 78 81 <br />Close es ed Straight row Good 58 72 81' IS • <br />or t Contoured Poor 64 7S 83 85 <br />rotation Contoured <br />Good SS 69 78 83 <br />meadow CCoontoured 4 terraced Poor Good 63 73 76 80 <br />Pasture Poor 68 79 86 19 <br />on range Fair . 49 69 79 84 <br />Good 39 61 74 80 <br />Contoured Poor 47 67 81 18 <br />Contoured Fair 25 59 75 83 <br />Contoured Good 6 35 70 79 <br />Meadow Good 30 5$ 71 78 <br />Woods or Poor 45 66 77 83 <br />Forest land Fair 36 60 73 79 <br />Good 25 5S 70 77 <br />Farmsteads - -- • 59 74 82 86 <br />JLLrve :sabers are computed assuming the runoff from the house and driveway is <br />directed towards the street with a minimum of roof water directed to lawns <br />where additional infiltration could occur. <br />3/the reaiaing pervious areas (lawn) are considered to be in good pastors <br />condition for these curve numbers. <br />11n some warmer climates of the country a curve naber of 95 may loused. <br />)Close - dritled or broadcast. <br />07 O ` ` V �4tsti <br />SDJRc,E : 'lwc.G1aN, R.Icl. , R (90 ‘D t. 1 N4 zo t (plc Ekopki.4 StS <br />14 <br />