CONTENTS 



Page 



I. INTRODUCTION 5 



1. Objective of the Study 5 



2. Design and Construction History 5 



II. EVALUATION OF DESIGN CHARACTERISTICS 19 



1. Wave Exposure 19 



2. Plan Shape 23 



3. Use of Model Tests in Design 23 



4. Armor Stability 25 



5. Settlement 31 



6. Littoral Transport 35 



7. Bottom Sediments 38 



8. Causeway Versus Wharf 43 



9. Ecological Effects 47 



10. Aesthetic Effects 50 



11. Precast Armor Versus Quarry Rock 51 



12. Construction Methods 51 



13. Island and Causeway Maintenance 52 



14. Seismic Evaluation 53 



III. RECOMMENDED ADDITIONAL DATA COLLECTION 54 



1. Wave Gages 54 



2. Sediment Gages 56 



LITERATURE CITED 58 



APPENDIX - The Biota of Rincon Island, California 59 



LITERATURE CITED IN APPENDIX 75 



TABLES 



1. Tidal Ranges at Punta Gorda 6 



2. Typical Overburden Materials at Island Site 13 



3. Armor Weight Requirements for Various Specific Gravities .... 15 



4. Estimated Annual Repair Cost for 27-foot Maximum Wave Design . . 26 



TABLES IN APPENDIX 



1. Algae Observed at Rincon Island 61 



2. Sponges at Rincon Island 62 



3. Coelenterates and Ctenophores at Rincon Island . 63 



