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<br />Reference Reports: <br /> <br />I. City of Sterling Drainage And Flood Control Implementation PI,m, by ICON Engineering, Inc. <br />dated June 1997. <br /> <br />2. Pawnee Creek - Logan County, Colorado: Flood of July 1997, (Draft) by Colorado Water <br />Conservation Board, dated October, 1997. <br /> <br />3. Flood Plain Information and Drainage Plan for Sand Creek and the Pawnee Cn:ek Overflow at <br />Sterling, Colorado by Charles F. Leaf and Resource Consultants, 1m:., dated May 1983. <br /> <br />4. Sand Creek Watershed, Sterling, Colorado by the lJ.S.D.A. Soil Conservation Service, dated <br />August 1984. <br /> <br />5. Summary Report, Flood Plain Information for Sand Creek and the Pawnee Cre'ek Overflow at <br />Sterling, Colorado by Charles F. Leaf and Resource Consultants, Inc., dated January 1987. <br /> <br />6. Proposed Near-Term Improvements and Operation of Pioneer Drainage Ditch, Skrling, Colorado <br />by Charles F. Leaf and Resourct: Consultants, Inc., datc:d July 1988. <br /> <br />7. Proposed Near-Term Improvement and Operation of Pioneer Ditch, Sterling, Colorado, "Summary <br />Report" by Charles F. Leaf and Resource Consultants, Inc., dated July 1988. <br /> <br />8. Flood Insurance Study, City of Sterling, Colorado, Logan County by Fedc:ral Emergency <br />Management Agency, dated September 29, 1989. <br /> <br />9. Flood Plain Management Study" Pawnee Creek in Logan County, Colorado by U.S. Department of <br />Agriculture, Soil Conservation Service, dated April 1992. <br /> <br />10. Section 22 Planning Assistance, Major Drainageway Plan Pioneer Ditch at Sterling, Colorado by <br />U.S. Army Corps of Engineers, dated December 1995. <br /> <br />Hydrology <br /> <br />A detailed hydrologic analysis was not completed as a part of this report. The hydrology from <br />previous reports was reviewed and utilized in this study. The source for the Pawnee Creek hydrology <br />is the April 1992 SCS Report. Peak flows taken from this repOlt at key design points for the existing <br />channel conditions are shown on the following table. In addition, flow values were c'ompared to the <br />estimated peak flows that resulted from the July 30, 1997 flood, which likely was the flood of record <br />on Pawnee Creek. <br /> <br />1-6 <br />