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RUNOFF FACTORS FOR STORM SEWERS <br />,t <br />FLAT <br />ROLLING <br />0-5$ <br />5% <br />I <br />UNDEVELOPED LAND <br />t <br />0.10 <br />0. 15 <br />Wood F Forest . . . . . . . . . <br />Sparse Trees § Ground Cover <br />0.15 <br />0.20 <br />0.25 <br />I <br />Light Grass to Bare Ground <br />0.20 <br />IDEVELOPED <br />AREA <br />Pavement & Roofs <br />0.90 <br />0.75 <br />0.90 ; <br />0.90 <br />I <br />Gravel Roads F, Parking Lots . . <br />. . . . <br />0.85 <br />0.90 <br />City Business <br />. <br />Co uturt <br />s ; <br />Apartment Dwelling, Areas . • • <br />• • . . 0.�� <br />0.80 <br />Industrial Areas (Heavy) . • • <br />' ' ' 0.7 <br />0.0 <br />I <br />Industrial Areas (Light) • • • <br />. . ' . <br />0.60 <br />0.070 <br />Earth Shoulder <br />. <br />p 25 <br />�• CeWIS+lny <br />Playground <br />0.20 <br />' <br />F, <br />Lawns, Meadows Pastures <br />0.15 <br />0.20 <br />Parks f, Cemetery , . . • . . <br />. • . • <br />' <br />SINGLE FAMILY <br />RESIDENTIAL <br />(Dwelling Unit/Gross Acre) <br />1.0-1.5 DU/GA . . . ... <br />. . . . . . . . <br />. . 0.30 <br />0.35 <br />1.5-3.0 DU/GA . . . . <br />. . . . . . <br />0.40 <br />3.0-3.5 DU/GA. . . . . <br />. . . . . . . . <br />. . <br />0. <br />3.5-4.0 DU/GA . . <br />50 <br />0.50 <br />4.0-6.0 DU/GA . . . . <br />. . . . . . . . <br />. . <br />0.0 <br />•6.0-9.0 DU/GA . . . . . <br />. . . . . . . <br />. . <br />0.70 <br />' <br />9.0-15.0 DU/GA . . . . . <br />. . . . . . . <br />. . <br />