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DRAINAGE CALCULATIONS <br /> GAFFNEY/JOHNSON <br /> 10505 19T" AVENUE S.E. <br /> Page 3 <br /> 100-YEAR STORM <br /> Q100DEVEIAPED - �.54 C.f.$. <br /> As overflow 0.54 cfs can ba carried in a 12-inch pipe @ 1.08; <br /> capacity = 4+ cfs, Therefore O.K. <br /> � <br /> I <br /> i <br /> II <br /> �I <br />