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<br />IOO-year flood depth, the assumed depth shall be so <br />stated on the maps. <br /> <br />GeomorDhic Features Methods. Approxi- mate <br />flood boundaries may be determined from <br />geomorphic features on the best available <br />map. <br /> <br />c. Historic Flood Method. Historical flood information <br />may be used directly if the peak discharge can be shown <br />to approximate a IOO-year flood and is applicable to <br />the present conditions. Historical flood information <br />may be available in government reports on maps that <br />have been prepared for major floods, from high-water <br />marks, from gaging station data, or from miscellaneous <br />discharge measurements made in the study area. <br /> <br />b. <br /> <br />IOO-year <br />a study 0'. <br />topographic <br /> <br />D. Published Report and Maps <br /> <br />1. ReDorts. All approximate floodplain information which is <br />presented to the Board for designation and approval shall <br />be entitled, dated, and bound in an individual document. <br /> <br />2. Published MaD Scale. The published flooded area map <br />scale shall be 1 inch equals 2000 feet or such map scale <br />showing greater detail. <br /> <br />E. Qualifications. All approximate floodplain information shall <br />be developed by a qualified hydrologist or hydraulic engineer <br />under the direct supervision of a professional engineer <br />registered in the State of Colorado, or by an employee of a <br />state or federal government agency that has executed a <br />memorandum of understanding or other written agreement with the <br />Board based on a written statement which demonstrates to the <br />satisfaction af the Board their equivalent qualifications to <br />perform such work in Colorado. <br /> <br />-18- <br />