4 - Design Criteria 37 



Objective 37 



Bypassing Concepts and Methods 38 



Fixed systems 39 



Mobile systems 40 



Semifixed (semi-mobile) systems 41 



Design Considerations 41 



Quantity 41 



Seasonal effects 44 



Sand sources 45 



Placement options 46 



Constraints 48 



Equilibrium Ebb Shoal Volume 48 



5 - Bypassing Alternatives 55 



Alternative 1 : Floating Plant 55 



Alternative 2: Semifixed Plant 56 



Alternative 3: Land-based Mobile Plant (Crawlcat/Crawldog) 62 



Alternative 4: Submerged Mobile Plant (Punaise) 64 



Alternative 5: Mechanical Fillet Mining 68 



Summary 69 



6 - Other Bypassing Studies 79 



7 - Conclusions 81 



References 86 



Appendix A: Chronological List of Geological Events Al 



Appendix B: Cartographic Data Analysis and Coordinate Conversion Bl 



Appendix C: Adjustment of 1933 Hydrographic Data to Modern Datum CI 



Appendix D: Simulation of 1949 Barrier Topography Dl 



Appendix E: Floating Plant Annual Cost Amorization El 



Appendix F: Booster Pump Worksheet Fl 



Appendix G: Construction Cost Summaries for Alternative 2: Semifixed Plant Gl 



IV 



