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I <br />RUNOFF FACTORS FOR STORM SEWERS <br />(V.ilues of "C" in n = CIA) <br />srwHot�isi-� _covi r � <br />_ <br />PLAT <br />ROLLING <br />0-58 <br />5e. <br />UNDEVELOPED <br />LAND <br />Wr.nd & Forest... <br />Sparse 'frees <br />................. <br />& Ground Cover <br />0.10 <br />0.15 <br />Light Grass <br />................... <br />to Bare Ground <br />0.15 <br />0.20 <br />.................... <br />0.20 <br />0.25 <br />DEVELOPED AREA <br />Pavement & Roofs.. 0.90 0.90 <br />Gravel Roads & Parking Lots ................... 0.75 0.80 <br />City Business..... 0.85 0.90 <br />Apartment Dwelling Areas .................. 0.80 0.85 <br />Industrial Areas (Heavy) ...................... 0.70 0.60 <br />Industrial Areas (Light) ...................... 0.60 0.70 <br />Earth Shoulder ......................... 0.50 O. <br />Playground ............................... U <br />0.25 0.S50 <br />Lawns, Meadows & Pastures ..................... 0.20 0.25 <br />Parks & Cemeteries ............................ 0.15 0.20 <br />SINGLE FAMILY RESIDENTIAL <br />(Dwelling Unit/Gross Acre) <br />1.0 <br />- 1.5 <br />DU/GA <br />1.5 <br />- 3.0 <br />............... <br />DU/GA <br />0.30 <br />1.0 <br />- 3.5 <br />........................................... <br />DU/GA <br />0.35 <br />3.5 <br />- 4.0 <br />.................... <br />DU/GA.................. ............. <br />0.40 <br />4.0 - <br />6.0 <br />............... <br />DU/GA <br />0.45 <br />6.0 - <br />9.0 <br />................................. <br />DU/GA <br />0.50. <br />9.0 - <br />15.0 <br />................. <br />DU/GA <br />0.60 <br />................................. <br />0.70 <br />113 <br />