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<br />I TABLE OF CONTENTS <br />I Page <br /> PREFACE <br />I I. INTRODUCTION 1 <br /> A. Autho ri zat ion <br />I B. Acknowledgements <br /> C. Purpose and Scope <br /> D. Organization of Report <br />I E. Mapping and Surveying <br /> F. Previous Action and Related Studies <br /> G. List of Figures and Drawings <br /> H. References <br />I <br /> II. STUDY AREA DESCRIPTION 8 <br />I A. Location <br /> B. Drainage Basin Characteristics <br />I C. Ground Water Characteristics <br /> II I. HYDROLOGY AND HYDRAULIC ANALYSES 11 <br />I <br /> A. Hydrology Analysis <br />II B. Hydraulic Analysis .-- ~ - <br /> IV. SPECIFIC PROBLEMS AND RECOMMENDATIONS 12 <br />I A. GROUNDWATER 12 <br /> 1. Hi story <br /> 2. Investigation <br />I 3. Alternative Solutions <br /> 4. Recorrnnendations <br />I B. HIGHWAY 159 CROSSING OF RITO SECO 17 <br /> 1. History <br /> 2. Investigation <br />I 3. Alternative Solutions <br /> 4. Recommendations <br /> C. PROTECTION PROVIDED BY LEVEE 19 <br />I 1. History <br /> 2. Investigation <br /> 3. Alternative Solutions <br />I 4. Recommendations <br /> D. NORTH BASIN OF RITO SECO 22 <br />I 1. Hi story <br /> 2. Investigation <br /> 3. Alternative Solutions <br /> 4. Recommendations <br />I E. PRELIMINARY COST ESTIMATES 24 <br />I <br />