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<br />second. The flood insurance report flood profiles indicate that out <br />of channel flooding occurs in all streams on a regularly basis. The <br />paleohydrologic investigations and analyses of streamflow data do not <br />support the frequent occurrence of these high discharges. Similarly, <br />these invEstigations do not support the occurrence of less frequent <br />flood discharges (100- and 500-year). Detailed onsite paleohydrologic <br />investigations in these tributaries and in other nearby representative <br />basins and the development of regional flood-frequency relations <br />(based on a rainfall flood contributing area below 7,500 to 8,000 <br />feet) could improve the flood hydrology in these bas~ns. <br />The onsite investigations also identified the occurrence of a <br />very large debris flow in Sutherland Creek. Debris flows recur when <br />sufficient weathered material develops on steep SlOp~8. There is a <br />need to determine the potential for other debris flows since the noted <br />debris flow occurred in area that is now a developed. <br /> <br />ACKNOWLEDGEMENT <br />I would like <br />Jarrett to measure <br />investigations. <br /> <br />to ackawledge the time and assistance from Carolyn <br />channel dimensions during the paleohydrologic <br /> <br />REFERENCES <br />Follansbee, Robert, and Sawyer. L. R., 1948, Floods in Colorado: U. S. <br />Geological Survey Water-Supply Paper 997, 151 p. <br />Jarrett, R. D.. 1987, Flood hydrology of foothill and mountain streams <br />in Colorado: Fort Collins, Colorado, Colorado State Universi ty, <br />Department of Civil Engineering. Ph.D. dissertation, 239 p. <br />U. S. Al-my C01'PS of Engineers. 1974, Flood Plain Information, Fountain <br />Creek, Colorado Springs and Manitou Springs, Colorado. Albuquerque <br />District, Albuquerque, New Mexico, 46 p. <br />U. S. F'ede::.~al Management Agency, 1983, Plood Insurance Study, City of <br />Manitou Sp:c'ingg, Colorado,. 1 volume. <br /> <br />i <br /> <br />I~ <br />