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<br />9. U.S. Department of the Interior, Geological Survey, water-Supply <br />Paper 1680, Magnitude and Frequency of Floods in the United States- <br />-Part 6B. Lower Mississippi River Basin, 1964 <br /> <br />10. U.S. Department of the Interior, Geological Survey, Water-Supply <br />Paper 1850-B, Floods of June 1965 in the South Platte River Basin, <br />Colorado, 1965 <br /> <br />11. <br /> <br />U.S. Department of the Interior, Ocological Survey, Water Resources <br />Data for Colorado, part I, Surface Water Records, prepared in <br />cooperation with the State of Colorado and other agencies <br /> <br />. <br /> <br />. <br /> <br />12. <br /> <br />U.S. Department of the Interior, Geological Survey, Flood prone <br />Area Map, Scale 1:24,000, Contour Interval 10 feet: ~o~smont, <br />Colorado (1970) <br /> <br />13. U.S. Water Resources Council, "A Uniform Technique for Determining <br />Flood Flow Frequencies," Bulletin 15, December 1967 <br /> <br />14. U.S. Department of the Army, Corps of Engineers, Hydrologic Engi- <br />neering Center, HEC-l Flood Hydrograph Package, 723-010, Davis, <br />California, 1973 <br /> <br />15. Bruns, Inc., Major Storm Drainage, 1973, Longmont, Colorado, 1973 <br /> <br />16. U.S. Department of the Army, Corps of Engineers, Omaha District, <br />"Correspondence regarding Spr ing Gulch, addressed to W.B. Spr ings- <br />ton, Civil Engineer, Region VII, U.S. Department of Housing and <br />Urban Development," R.G. Burnett, Chief, Engineering Division, <br />June 2, 1971 <br /> <br />17. Urban Drainage and Flood Control District, Rainfall/Runoff Informa- <br />tion--Magni tude/Frequency , Design Rainfall, Small Urban Basin~, <br />May 1972 <br /> <br />18. U.S. Department of the Interior, Geological Survey, Manual for <br />Estimating Flood Characteristics of Natural Flow Streams in Colo- <br />rado, Jerald F, McCain and Robert D. Jarrett, 1975 <br /> <br />19. U.S. Department of AgriCUlture, Soil Conservation Service, Proce- <br />dures for Determining Peak Flows in Colorado, December 1972 <br /> <br />. <br /> <br />20. <br /> <br />U.S. Department of the Army, Corps of Engineers, Hydrologic Engi- <br />neering Center, HEC-2 Water-Surface profiles, Generalized Computer <br />Program, Davis, California, 1973 <br /> <br />21. U.S. Department of the Interior, Geological Survey, 7.5-Minute <br />Series Topographic Maps, Scale 1:6,000 (enlarged from 1:24,000), <br />Contour Interval 10 feet: Longmont, Colorado (1968), Photorevised <br />(1971) <br /> <br />25 <br />