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<br />Neighborhood Area I 0.50 - 0.70 <br />RESIDENTIAL <br />Single-Family Areas 0.30 - 0.50 <br />Multi-Units. Detached 0.40 - 0.60 <br />Multi-Units, Attached 0.60 - 0.75 <br />RESIDENTIAL (Suburban) 0.25 - 0.40 <br />APARTMENT DWELUNG AREAS 0.50 - 0.70 <br />INDUSTRIAL <br />Ught Areas 0.50 - 0.80 <br />Heavy Areas 0.60 - 0.90 <br />PARKS, CEMETERIES 0.10 - 0.25 <br />PLAYGROUNDS 0.20 - 0.35 <br />RAILROAD YARD AREAS 0.20 - 0.40 <br />UNIMPROVED AREAS 0.10 - 0.30 <br />STREETS <br />Asphaltic 0.70 - 0.95 <br />Concrete 0.80 - 0.95 <br />Brick 0.70 - 0.85 <br />DRIVES AND WALKS 0.75 - 0.85 <br />ROOFS 0.75 - 0.95 <br />LAWNS; SANDY SOIL <br />FIa~ 2% 0.05 - 0.10 <br />Avemge, 2-7% 0.10 - 0.15 <br />Steep, 7% 0.15 - 0.20 <br />LAWNS; HEAVY SOIL <br />FIa~ 2% 0.13 - 0.17 <br />Average, 2.7% 0.18 - 0.22 <br />Steep, 7% 0.25 - 0.35 <br /> <br />(From: Introduction to Hydrology, Viesmann, el.al., Dun-Donnelley, 1977.) <br /> <br />Colorado Flood <br />Hydrology Manual <br /> <br />7-34 <br /> <br />fR/JFT <br />