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<br />- 28 - <br /> <br />;" <br /> <br />For the class "c" structure, routing of the IOO-year frequency, <br />six-hour duration rainstorm determined the minimum crest elevation <br />of the emergency spillway. The freeboard hydrograph, using moisture <br />condition II and 2.5 of the six-hour rainfall determined the minimum <br />capacity of the emergency spillway, <br /> <br />t <br />~, <br />~ <br />l <br /> <br />I <br />f, <br />i <br />I <br /> <br />" <br /> <br />, <br /> <br />f <br />!: <br />" <br /> <br /> <br />Ii: <br />~ <br /> <br />I <br /> <br />r <br />