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1 <br />' 230 <br />t 1 flood events? <br /> 2 What we have referenced in our report is <br />' <br /> 3 an a-hour PMP which has a total precipitation volume <br />' 4 of 14 inches. What the expert this morning for <br /> 5 opposition indicated was that was 19 inches. Now, <br /> 6 that has a duration, I should say -- not recurrence, <br /> 7 but a duration of 24 hours. <br />' 8 Now, if you are going to choose a flat <br /> 9 event to characterize what peak flows are going to <br />1 l0 b <br />t <br />i <br />l <br />t <br />h <br />i <br /> e, you <br />yp <br />cal <br />y look a <br />the catchment s <br />ze, t <br />e <br />' 11 time of concentration, and choose that flood. So <br /> 12 the particular catchment size we are dealing with <br />' 13 now is of 8-hour duration, valid flood event. <br /> 14 You then take that -- that, obviously, <br />' 15 for 14 inches over 8 hours, results in a higher- <br /> 16 intensity precipitation than 19 inches over <br />' 17 24 h <br />th <br />S <br />th <br />k th <br />t <br />f <br />t <br />t <br /> ours. <br />o <br />e pea <br />rom <br />you genera <br />e <br />a <br />a <br />' 18 flood in terms of a discharge rate is higher, even <br /> 19 though its total volume may be smaller. <br /> 20 So in terms of our choice of a flood <br /> 21 event, we believe we have been correct, and in terms <br /> 22 of what it is, is conservative in terms of what this <br /> 23 design does. We must remember that our design <br /> 24 i <br />i <br /> cr <br />ter <br />a know the entire facilities are based on a <br /> 25 100-year 24-hour precipitation event. - <br /> AGREN, BLANDO & BILLINGS <br />