Offloader Procurement Strategy Produced for California State Coastal Conservancy May 7, 2020 Offloader Procurement Strategy | State Coastal Conservancy Document Verification Client California State Coastal Conservancy Project name 18-091 Redwood City Harbor Beneficial Use Project Document title Offloader Procurement Strategy Document sub-title – Status FINAL Date 5/7/2020 Project number 10547 File reference Q:\WC\10547 Offloader Bid Solicitation\3_Design\Final Report\Final Offloader Procurement Strategy Report Revision Description Issued by Date Checked 00 Progress Draft MN 11/26/2019 DT 01 Draft MN 3/20/2020 SM; RD 02 Final MN 5/7/2020 DT; RD Produced by: Moffatt & Nichol 2185 N. California Blvd., Suite 500 Walnut Creek, CA 94596 (925) 944-5411 www.moffattnichol.com i Offloader Procurement Strategy | State Coastal Conservancy Table of Contents Document Verification ................................................................................................................................. i Table of Contents ........................................................................................................................................ ii List of Figures ............................................................................................................................................. iv List of Tables ............................................................................................................................................... v Glossary ...................................................................................................................................................... vi 1 Executive Summary .......................................................................................................................... 1 1.1 Introduction ............................................................................................................................... 1 1.2 Background ............................................................................................................................... 1 1.3 Physical Conditions ................................................................................................................... 2 1.4 Dredged Material Sources and Material Suitability .................................................................. 2 1.5 Required Site Improvements ..................................................................................................... 4 1.6 Power Requirements for Dredged Material Placement ............................................................. 6 1.7 Contracting Alternatives ............................................................................................................ 7 1.8 Environmental Documentation and Outreach ......................................................................... 11 1.9 CEQA/NEPA Strategy ............................................................................................................ 13 1.10 Conclusions and Recommendations ........................................................................................ 13 2 Introduction .................................................................................................................................... 16 2.1 Purpose and Need .................................................................................................................... 16 2.2 Scope of Work ......................................................................................................................... 16 3 Background ..................................................................................................................................... 18 3.1 Southern Eden Landing Ponds ................................................................................................ 18 3.2 Restoration Plans ..................................................................................................................... 18 3.3 Pond Sizes and Capacities ....................................................................................................... 19 4 Physical Conditions ........................................................................................................................ 21 4.1.1 Tides ........................................................................................................................... 21 4.1.2 Bathymetry ................................................................................................................. 21 4.1.3 Wind ........................................................................................................................... 21 4.1.4 Waves ......................................................................................................................... 21 4.1.5 Currents ...................................................................................................................... 24 5 Dredged Material Sources ............................................................................................................. 25 5.1 Sediment Sources .................................................................................................................... 25 5.2 Sediment Suitability ................................................................................................................ 28 5.3 Dredged Material Delivery ...................................................................................................... 29 5.4 Dredged Material Placement ................................................................................................... 30 6 Conceptual Improvements ............................................................................................................. 33 6.1 Onsite Improvements for Receiving Dredged Material .......................................................... 33 6.1.1 Placement Locations Within Eden Landing ............................................................... 33 6.1.2 Levee Repairs ............................................................................................................. 33 6.1.3 Water Control Structures ............................................................................................ 36 ii Offloader Procurement Strategy | State Coastal Conservancy 6.1.4 Water Management Requirements ............................................................................. 36 6.2 Offsite Improvements for Transporting Dredged Material ..................................................... 37 6.2.1 Offloader .................................................................................................................... 38 6.2.2 Pipeline ....................................................................................................................... 40 6.2.3 Booster Pump(s) ......................................................................................................... 42 6.2.4 Offloader Support Plant.............................................................................................. 42 7 Equipment Power Requirements .................................................................................................. 44 7.1 Electrical Power Option .......................................................................................................... 44 7.1.1 Overhead Transmission Line Power Drop ................................................................. 45 7.1.2 Temporary Pole Line .................................................................................................. 47 7.1.3 Temporary Submarine Cable ...................................................................................... 49 7.2 Diesel Power Option ............................................................................................................... 50 7.2.1 Diesel Generator ......................................................................................................... 50 7.3 Air Quality Analysis ................................................................................................................ 51 8 Contracting Alternatives ................................................................................................................ 52 8.1 Cost Estimating Methodology ................................................................................................. 52 8.2 Concession Model ................................................................................................................... 53 8.2.1 Site Development Costs (Contract 1) ......................................................................... 54 8.2.2 Offloader Operations Costs (Contract 2) .................................................................... 56 8.2.3 Summary of Costs for Concession Model .................................................................. 58 8.2.4 Procurement Strategy for Concession Model ............................................................. 60 8.3 USACE Dredging Project Model ............................................................................................ 61 8.3.1 Initial Onsite Improvement Costs (by SBSP Project) ................................................ 62 8.3.2 Costs for USACE Model ............................................................................................ 62 8.3.3 Summary of Costs for USACE Dredging Project Model ........................................... 62 8.3.4 Procurement Strategy for USACE Model .................................................................