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<br /> - - <br />I <br />I BIG DRY CREEK (ADCm NORTH AREA <br /> FLOOD HAZARD AREA DELINEATION <br />I TABLE OF CONTENTS <br /> LIST OF TABLES <br />I Section Description Page <br /> Table No. Table Name Page <br /> LETTER OF TRANSMITTAL I1I~ I Design Rainfall Depths - No Area Adjustment I1I-3 <br />I I1I-2 Sub-Basin Characteristics I1I-5 <br /> ACKNOWLEDGEMENTS I1I-3 Land-Use vs. Percent Impervious - Big Dry Creek I1I-6 <br />I (ADCO) North Area Tribularies <br />I. INTRODUCTION 111-4 Peak Flows at Selected Locations (Fulure Watershed I1I-10 <br /> A. Authorization I-I Imperviousness) <br />I B. Purpose and Scope I-I <br /> C. Data Collection 1-2 IV-I Flood Hazard Data for 100-Year Storm IV-6 <br />I IV-2 Flood Elevation Data for 10-, 50- and IV-7 <br />II. STUDY AREA DESCRIPTION 100-year Storms <br /> A. Introduction II-I <br />I B. Tributary Drainage Basins II-I <br /> C. Past Problems II-6 <br />I III. HYDROLOGIC ANALYSIS <br />I A. Introduction III-I <br /> B. Runoff Model III-I LIST OF FIGURES <br /> C. Design Rainfall III-I <br />I D. Basin Characteristics III-4 <br /> E. Impervious Land Density I1I-7 Figure No. Figure Name Page <br />I F. Flood Frequency and Discharge III-9 II-I Drainage Area II-3 <br />I IV. HYDRAULIC ANALYSIS I1I~ I Design Poinl Locations & Schematic Diagram III~2 <br /> A. HEC-2 Model IV-I I1I-2 Watershed Impervious - Existing Conditions III-8 <br /> B. Inadvertent Detention Areas IV-2 I1I-3 Watershed Impervious - Future Conditions III-II <br />I C. Hydraulically Disconnected Flow IV-4 III-4 Peak Flow Diagrams I1I-12 <br /> D. Floodway IV~4 <br />I E. Flood Hazard Data IV-5 <br />I REFERENCES <br /> APPENDIX: DRAWINGS <br />I <br />I <br /> -- <br /> - - --- <br />