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<br />..I <br /> <br />'- <br />. <br /> <br />Page 2 <br />Michael Buckley <br /> <br />Case 1: The peak flow values from the old study are significantly different than the peak flows for the <br />new study for the same stream reach, (The peak flows from the old study fall outside of the 90% <br />confidence interval of the new study). For this situation, the new peak flows should be adopted, <br /> <br />Case 2: The peak flow values from the old study are not significantly different than the peak flows for <br />the new study. (The peak flows from the old study fall within the 50% confidence interval of the new <br />study), For this situation, the old peak flows should remain in effect. <br /> <br />Case 3: The peak flow values from the old study are borderline between significantly different and not <br />significantly different than the peak flows for the new study. For this situation, the studies will be <br />reviewed and discussed on a case-by-case basis. <br /> <br />Your comments are welcomed regarding the above language, and I am interested to know if the State's <br />hydrologic criteria is in conflict with FEMA's criteria, Please call me if you have any questions or need <br />additional information. Thank you for your assistance on this matter, <br /> <br /> <br />homas W. Browning, P.E, 7 <br />Flood Control and Floodplain Management Section <br /> <br /> <br />TWB/twb <br />C:\seca\technical\buckely letter.doc <br />