Laserfiche WebLink
p.o. box 121 CLIENT: City of 6recky <br />~fi~ T c^+'dr'eY, m 80434 PROTECT: Eogkviar DATE: Lil/2003 <br />flPRPS o (970) 723-4061 PR07ECT NO.: 02,08 BY: TEB <br /> BASIIJ: Country Club - Historic to CQS RR Bridge <br />RATIONAL METHOD - RUNOFF CALQ/LATIONS <br />Reference: 1 Greeley -Storm Drainage Design Criteria, l0/1/97 <br />2 Urbm Storm Drairage Criteria Altarual UDFLD, Denver <br />3 Dillon -Storm Drnirage Design Criteria, 9/62 <br />(Eater data only in boxes. All other values are calalated by progrorn} <br />State; CO <br />Town: 6reeky <br />Basin: Cauriry Club <br />Sub-basin: Entire historic basin frrom U565 quad maF <br />Design point: Bridge order CGS Railroad <br />Condition: Historic, rmtive grass Iard, silty sardv soil <br />Design Storm: ~ 100 Yn' <br />Q = C ` i ` A where : C = rvroff coefficient <br />I =rainfall intensity (in/hr) <br />A =drainage basin area (acres) <br />Q = runoff ri cfs <br />r-_____~_- _-~_ ___--_~_~_ <br />Area <br />Coefficient, C <br />% Impervious <br />Lend use <br />Commercial <br />Street <br />Res (high) <br />Rrs (meduan) <br />R~ (law) <br />Pork /Lawn <br />School <br />Other siky, sturdy <br />Totd <br />Composite <br />USE: <br />Calalate percart of impervious area <br /> <br /> <br />Area <br />(arxs) Calalate weighted naroff coefficient "C <br />IrnperviarLV 0 yr <br />Percent Area Coefficient <br />Impervious (aarrs) °C• <br /> 85% 0.00 0.75 <br /> 100% 0.00 0.88 <br /> 70% 0.00 0.60 <br /> 42% 0.00 0.40 <br /> 25% 0.00 0.30 <br /> 7% 0.00 0.10 <br /> 50% 0.00 0.45 <br />1,317.00 0% 0.00 0.01 <br />1,317.00 0.00 <br />100 rr <br />WeTTrcrmt <br />aC <br />0.90 <br />0.93 <br />0.80 <br />0.65 <br />0.60 <br />0.45 <br />0.70 <br />0.20 <br />O% 0.01 0.20 <br />0.20 <br />gnat Historicxis Page 1 <br />