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RUNOFF FACTORS FOR STORM SEWERS <br />(Values of "C" in R - CIA) <br />FLAT ROLLING <br />0-5• 51 <br />UNDEVELOPED LAND <br />Wood& Forest ................................. 0.10 0.15 <br />Sparse Trees & Ground Cover ................... 0.15 0.20 <br />Light Grass to Bare Ground .................... 0.20 0.25 <br />DEVELOPED AREA <br />Pavement i Roofs .............................. 0.90 <br />0.90 <br />Gravel Roads &•Parking Lots ................... 0.75 <br />0.80 <br />CityBusiness... .......................... 0.95 <br />0.90 <br />Apartment Dwelling Areas ...................... 0.90 <br />0.85 <br />Industrial Areas (Heavy) ...................... 0.70 <br />0.80 <br />Industrial Areas (Light) ...................... 0.60 <br />0.70 <br />Earth Shoulder ................................ 0.50 <br />0.50 <br />Playground..... ........................ 0.25 <br />0.30 <br />Lawns, Meadows & Pastures ..................... 0.20 <br />0.25 <br />Parks & Cemeteries ............................ 0.15 <br />0.20 <br />SINGLE FAMILY RESIDENTIAL <br />(Dwelling Unit/Gross Acre) <br />1.0 - 1.5 DU/GA................................. <br />0.30 <br />1.5 - 3.0 DU/GA................................. <br />0.35 <br />3.0 - 3.5 DU/GA................................. <br />0.40 <br />3.5 - 4.0 DU/GA................................. <br />0.45 <br />4.0 - 6.0 DU/GA................................. <br />0.50 <br />6.0 - 9.0 DU/GA................................. <br />0.60 <br />9.0 - 15.0 DU/GA................................. <br />0.70 <br />is <br />