SANTA CATALINA ISLAND REPOWER FEASIBILITY STUDY AUGUST 2020 Prepared For: SOUTHERN CALIFORNIA EDISON Mr. Matthew Zents, PE Project Manager Southern California Edison 1515 Walnut Grove Avenue Rosemead, CA 91770 Santa Catalina Island Los Angeles County, California PROJECT NUMBER 226818-0000432.02 TABLE OF CONTENTS 1.0 Overview ................................................................................................................................. 10 2.0 Existing Land, Environmental, and Electrical Conditions ............................................... 12 2.1 Island Overview ............................................................................................................................... 12 2.2 Land Ownership .............................................................................................................................. 12 2.3 Existing Environmental Conditions .............................................................................................. 13 2.4 Existing and Forecasted Electrical Load Profile ........................................................................ 14 2.5 Existing Electrical Infrastructure and Distribution ..................................................................... 18 3.0 Emissions Compliant Fossil Fuel Generation ................................................................... 22 3.1 Generator Replacement ................................................................................................................ 22 3.2 Electrical Power System ................................................................................................................ 31 3.3 Estimate of Probable Construction Cost ..................................................................................... 36 3.4 Consolidated Cost Estimates ........................................................................................................ 38 3.5 Cost Adjustment for Santa Catalina Island ................................................................................ 43 3.6 Permitting and Schedule Estimates for Power Plant Generation .......................................... 45 4.0 Renewable Energy ................................................................................................................ 47 4.1 Renewable Resource Assessment .............................................................................................. 47 4.2 Site Selection .................................................................................................................................. 64 4.3 Synergi Analysis .............................................................................................................................. 84 4.4 Microgrid Analysis .......................................................................................................................... 96 4.5 60% Renewable Microgrid ..........................................................................................................104 5.0 Submarine Power Cable ....................................................................................................112 5.1 Undersea Cable Introduction ......................................................................................................113 5.2 Submarine Cable Option .............................................................................................................118 5.3 Execution Plan ..............................................................................................................................122 5.4 Cost and Schedule .......................................................................................................................131 5.5 Risk Considerations .....................................................................................................................132 5.6 Conclusion .....................................................................................................................................133 6.0 NREL Phases I & II Summary ...........................................................................................134 6.1 Methodology ..................................................................................................................................134 6.2 Results ...........................................................................................................................................135 6.3 Discussion: Potential Next Steps Incorporating Load Increases, Decreases, and Deferable Loads..............................................................................................................................................143 7.0 Energy Efficiency and Demand Response ......................................................................145 7.1 Introduction ...................................................................................................................................146 7.2 Existing Conditions and Energy Use Overview .........................................................................147 7.3 Catalina Island Load Data...........................................................................................................158 7.4 Current Load Reduction Potential .............................................................................................166 7.5 Domestic Customers Recommendations.................................................................................170 7.6 Non-Domestic Customer Recommendations ..........................................................................172 7.7 EE Implementation Considerations ...........................................................................................179 ProjectProject NumberNumber 226818226818--0000432.0000432.0202 NV5.COMNV5.COM || ii 7.8 Projected Load Increases ............................................................................................................180 7.9 Conclusion .....................................................................................................................................183 8.0 Recommended Further Study ...........................................................................................185 8.1 Load Decreases: Energy Efficiency, Demand Response, Deferrable Loads .......................185 8.2 Load Increases: Building Electrification, Vehicle Electrification, Cruise Ship Electrification ........................................................................................................................................................185 8.3 NREL REOPT Phase III Study ......................................................................................................185 8.4 Renewable Microgrid and Electrical Grid Study ......................................................................186 8.5 Project Development Support ....................................................................................................186 9.0 References ...........................................................................................................................187 10.0 List of Abbreviations ...........................................................................................................191 11.0 Appendix ..............................................................................................................................195 ProjectProject NumberNumber 226818226818--0000432.0000432.0202 NV5.COMNV5.COM || iiii FIGURES Figure 2-1 - Existing Generators: Location, Capacity and Voltage ....................................................... 15 Figure 2-2 - 2017 Generation Profile .................................................................................................. 16 Figure 2-3 - Catalina Island 20 Year Load Growth, 0.5% .................................................................... 17 Figure 2-4 - Catalina Island 20 Year Load Growth, 1% ....................................................................... 17 Figure 2-5 - Catalina Island Future Growth ......................................................................................... 18 Figure 2-6 – CYME Model, City of Avalon Distribution Network .......................................................... 19 Figure 2-7 – Screenshot from SCE CYME Model Showing High Loading Values ................................ 21 Figure 3-1 - Service Capacity and Future Demand .............................................................................. 26 Figure 3-2 - 2.4 kV System Capacity--Generators and Transformer .................................................... 27 Figure 3-3 – General Arrangement of 100% Propane Generator Fleet .............................................. 29 Figure 3-4 - Propane Storage for 100% Propane Generator Fleet ...................................................... 30 Figure 3-5 - Engine Bays and Engines ................................................................................................. 36 Figure 3-6 - Fuel Delivery Distribution ................................................................................................. 38 Figure 3-7 - Option 1 All Engine Replacement..................................................................................... 39 Figure 3-8 - Option 2 Two Engine Replacement .................................................................................. 41 Figure 3-9 - Location Adjusted Project Costs: All Engines ................................................................... 44 Figure 3-10 - Location adjusted