HDOT Climate Resilience Action Plan | May 2021

TABLE OF CONTENTS Appendix A. List of Recommendations from the Exposure assessments ..................................................................A-1 A.1 Asset Inventory....................................................................................................................................A-1 A.2 Precipitation and Temperature Projections ....................................................................................A-1 A.3 Rockfall and Landslide .......................................................................................................................A-2 A.4 Chronic Coastal Flooding...................................................................................................................A-3 A.5 Storm Surge.........................................................................................................................................A-3 A.6 Tsunami ...............................................................................................................................................A-4 A.7 Wildfire .................................................................................................................................................A-5 A.8 Lava Flow.............................................................................................................................................A-6 A.9 Appendix A References .......................................................................................................................A-7 Appendix B. Overview of State, Local, and Federal Technical Resources and Guidance Pertaining to Climate Change in Hawai‘i.........................................................................................................................B-1 B.1 State Guidance ................................................................................................................................... B-1 B.1.1 Statewide Documents .....................................................................................................B-1 B.2 HDOT Studies and Programs ............................................................................................................ B-2 B.3 Local Guidance................................................................................................................................... B-3 B.3.1 City and County of Honolulu’s Mayor’s Directive .........................................................B-3 B.3.2 Establishment of No Build Zones by County Governments ........................................B-4 B.3.3 County Hazard Mitigation and Resilience Plans ...........................................................B-4 B.4 Federal/National Guidance............................................................................................................... B-5 B.4.1 American Association of State Highway and Transportation Officials (AASHTO).....B-5 B.4.2 Federal Highway Administration (FHWA) ......................................................................B-5 B.4.3 U.S. Army of Corps of Engineers (USACE) ................................................................... B-11 B.4.4 National Oceanic and Atmospheric Administration.................................................. B-13 B.4.5 Federal Emergency Management Agency .................................................................. B-13 B.5 Appendix B References.................................................................................................................... B-13 Appendix C. Environmental Offices in State DOTs .......................................................................................................C-1 C.1 Introduction.........................................................................................................................................C-1 C.2 HDOT’s Current Environmental Organizational Structure.............................................................C-1 C.3 Roles for a State DOT Environmental Unit .......................................................................................C-2 C.4 Changing Contexts for Transportation and Environmental Analysis............................................C-3 C.5 Illustrative State DOT Structures for Environmental Units ............................................................C-4 C.5.1 Washington State Department of Transportation (WSDOT) .......................................C-5 C.5.2 Minnesota Department of Transportation (MnDOT) ....................................................C-7 C.5.3 Maryland Department of Transportation (MDOT) ........................................................C-8 C.5.4 Florida Department of Transportation (FDOT) ...........................................................C-10

HAWAI‘ I HIGHWAYS | CLIMATE ADAPTATION ACTION PLAN ( i )