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<br />I <br /> <br />I <br /> <br />Table 4. Percent Impervious for Developed Conditionsl. <br /> <br />I <br /> <br />Land Use <br /> <br />Percent Impervious <br /> <br />I <br /> <br />Business (B)2: <br /> <br />I <br /> <br />BG,BL,BP,HB,C,IL, <br />IG,IP <br /> <br />90 <br /> <br />I <br /> <br />Residential: <br /> <br />(RH)2,RMP <br />(RM)2,RP,MM <br />(RL)2,RLP,RLM,ML <br /> <br />60 <br />45 <br />40 <br /> <br />I <br /> <br />Parks, Greenbelts, etc.(p)2: <br /> <br />10 <br /> <br />I <br />I <br /> <br />1 Engineering Division, Department of Public Works <br />and Water Utilities, City of Fort COllins, 1980 <br />"Storm Drainage Design Criteria" (reference 3). <br /> <br />I <br /> <br />2 Map Symbol, Figure 4 <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />12 <br /> <br />Table 5. Infiltration Rates for Fossil Creek Basin. <br /> <br />Soil Association <br /> <br />Soil Series <br /> <br />Permeability <br />(Inches/Hour) <br /> <br />SWMM <br />Infiltration <br />Rate <br />(Inches!Hour) <br /> <br />Otero-Nelson-Tassel <br /> <br />3.0 <br /> <br />Haplustolls-Baller-Rock outcrop <br /> <br />Nunn-Fort Collins-Ulrn <br /> <br />Laporte-Kirn-Minnequa <br /> <br />Heldt-Renohill-Kirn <br /> <br />Otero <br />Nelson <br />Tassel <br /> <br />Baller <br /> <br />Nunn <br />Fort Collins <br />Ulrn <br /> <br />Laporte <br />Kim <br />Minnequa <br /> <br />Heldt <br />Renohill <br />Kim <br /> <br />6.0-2.0 <br />2.0-6.0 <br />2.0-6.0 <br /> <br />2.0-6.0 <br /> <br />0.2-2.0 <br />0.6-2.0 <br />0.2-0.6 <br /> <br />0.6-2.0 <br />0.6-2.0 <br />0.6-2.0 <br /> <br />0.2-0.6 <br />0.2-0.6 <br />0.6-2.0 <br /> <br />3.0 <br /> <br />1.0 <br /> <br />1.0 <br /> <br />0.4 <br />