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<br />A flood plain study for Sutherland Creek in the Crystal Hills area of <br />Manitou Springs was printed in July 1975 (Reference 13). The 100-year <br />flood discharge of 750 cfs determined in that study was found to be <br />too low because an assumption was made in that study that Fountain and <br />Sutherland Creeks would have coincident flood events. The contributing <br />discharge of Sutherland Creek to Fountain Creek at their confluence <br />is l,OOO cfs in the U.S. Army Corps of Engineers report (Reference 3), <br />and the 1975 flood plain study for Sutherland Creek assumed that this <br />was the total discharge of the 100-year storm on Sutherland Creek. <br />The U.S. Army Corps of Engineers report did not assume coincident flood <br />events on the two streams, and the Sutherland Creek discharge of l,OOO <br />cfs at the mouth actually represents a far more frequent event. <br /> <br />'ta <br /> <br />~ <br /> <br />Flood boundary delineations for this Flood Insurance Study supersede <br />those shown on the Flood Hazard Boundary Map (Reference 14). <br /> <br />This study is authoritative for the purposes of the National Flood Insur- <br />ance Program; data presented herein either supersede or are compatible <br />with all previous determinations. <br /> <br />7.0 LOCATION OF DATA <br /> <br />Information concerning the pertinent data used in preparation of this <br />study can be obtained by contacting the Natural Clnd Te.chnological Hazards <br />Division, Federal Emergency Management Agency, Building 7l0, Denver <br />Federal Center, Lakewood, Colorado 80225. <br /> <br />. <br /> <br />8.0 BIBLIOGRAPHY AND REFERENCES <br /> <br />l. U.S. Department of Commerce, Bureau of the Census, 1970 Census <br />of population, Number of Inhabitants, Colorado, 1971 <br /> <br />2. U.S. Department of Commerce, National Oceanic and Atmospheric <br />Administration, National Climatic Center, Climatography of the <br />United States No. 81, Monthly Normals of TE!mperature, Precipitation, <br />and Heating and Coolin<;J Degree Days 1941-7(~, ASheville, North <br />Carolina, 1973 . <br /> <br />3. U.S. Department of the Army, Corps of Engineers, Albuquerque District, <br />Flood Plain Information, Fountain Creek, Colorado Springs and <br />Manitou Springs, August 1974 <br /> <br />4. U.S. Department of the Interior, Geological Survey, Water-Supply <br />Paper 997, Floods in Colorado, Robert Follansbee and Leon R. Sawyer, <br />1948 <br /> <br />5. U.S. Water Resources Council, Hydrology Corrmittee, Bulletin 17, <br />"Guidelines for Determining Flood Flow Frequency, March 1976 <br /> <br />. <br /> <br />22 <br />