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! <br /> Distance = 280 feet ----------------------- Velocities = 0.43 ft./sec. <br /> T = 280 feet + 10.0 min. <br /> (60 sec.) (0.43 ft./sec. ) <br /> = 10.85 min. + 1(1. � min. <br /> = 20.85 min. <br /> , � I10 = 1.25 in./hr. <br /> Q = C.I.A. <br /> _ (0.05) (1.25 in./hr.) (1.07 Acres) <br /> = 0.07 cfs <br /> S[JPIDfARY OF UNDEVELOPED RUVOFF <br /> A1 = 0.20 cfs <br /> A2 = 0.07 cfs <br /> CALCULATION STORAGE VOLUME <br /> The Volume of the pipe will be determined by using the Vrjanainen and <br /> Warren formulas as modified for the North Bend (City of Everett) area. <br /> fSee table 4 attached). <br /> IN GEI�ERAL: <br /> V� = 4329 T _ 40 O.T. <br /> T + 25 <br /> WFIERE: <br /> Qo = Allowable Outfall <br /> (Acreage)(Pu[ure runoff coef.) <br /> C = -Future runoff coef. <br /> T25 = 25 year peak storagc time (min.) <br /> T = -25 + 2706 <br /> Qo <br /> Vs = Maximum Storage Volume (ft.3/acre) <br /> Vs = (4329) (T) _ (40)(Oo)(T) <br /> T + 25 <br /> Vt = (Vs) (Acreage) (Runoff coef.) <br />