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<br />. <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />TABLE I <br /> <br />RA TIONAL METHOD RUNOFF COEFFICIENTS ~, <br /> <br />Description of Area <br /> <br />Runoff Coefficients <br /> <br />Busines s: <br />Downtown areas <br />Neighborhood areas <br /> <br />0.70 to 0.95 <br />0.50 to 0.70 <br /> <br />Residential: <br />Single-family areas <br />Multi units, detached <br />Multi units, attached <br /> <br />0.35 to 0.50 <br />0.40 to O. 60 <br />o. 60 to O. 75 <br /> <br />Residential (1/2 acre lots or more) <br /> <br />0.30 to 0.45 <br /> <br />Apartment dwelling areas <br /> <br />0.50 to 0.70 <br /> <br />Industrial: <br />Light areas <br />Heavy areas <br /> <br />0.50 to 0.80 <br />O. 60 to O. 90 <br /> <br />Parks, cemeteries <br /> <br />0.10 to O. 25 <br /> <br />Playgrounds <br /> <br />0.20 to 0.35 <br /> <br />Railroad yard areas <br /> <br />O. 20 to 0.40 <br /> <br />Unimproved areas <br /> <br />0.10 to O. 30 <br /> <br />*From Denver Regional Council of Governments Urban Storm Drainage <br />Criteria Manual, Volume I <br /> <br />13 <br />