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<br />.' <br /> TABLE OF CONTENTS <br />t <br /> Section Page <br /> Number Section Title N umbe r <br /> LETTER OF TRANSMITTAL <br /> CER TIFICA TE OF ENGINEERS i <br /> TABLE OF CONTENTS ii <br /> LIST OF TABLES AND FIGURES iii <br /> APPENDICES lV <br /> I INTRODUCTION AND CONCLUSIONS <br /> Scope of Services I-I <br /> Previous Planning Efforts 1-2 <br /> Conclusions and Recommendations 1-3 <br /> II STUDY AREA II-I <br />. <br /> III HYDROLOGIC ANALYSES <br /> Flood Hydrology III- I <br />1 <br /> Des~gn Rainfall III - 2 <br /> Peak Flows - South Boulder Creek III - 4 <br /> Backwater Analysis III - 5 <br /> Description of the Extent of Flooding III - 6 <br /> IV BENEFIT - COS T ANALYSIS IV -I <br /> V FLOOD CONTROL ALTERNATIVES <br /> Environmental Cons ide rations V -I <br /> Flood Control Alternatives V-2 <br /> Flood Plain Evacuation V-13 <br /> Marshall Gulch V-13 <br /> Selected Alternatives V-18 <br /> VI PRELIMINAR Y DESIGN <br /> Des ign Criteria VI-I <br /> Design Parameters VI-3 <br /> Flood Detention Reservoirs VI-5 <br /> Soft Channel VI-7 <br /> Berms at Denver-Boulder Turnpike VI-8 <br /> Land Restoration VI-9 <br /> Recreational Use VI-9 <br />~ Improvements at Bridges VI-9 <br /> Cost Estimates VI-I0 <br /> - ii - <br /> <br /> <br />~ <br />