Discovery Meeting: City & County of Honolulu

1. Discovery Meeting: City & County of Honolulu Honolulu, HI August 11, 2011

2. Agenda • Introductions • Meeting Goals and Objectives • Risk MAP Program Overview • Flood Risk Assessment Products • Discovery Process • Flood Risk Data & Discovery Map • Mitigation Planning • Next Steps

3. Introductions • Risk MAP Project Team • City and County of Honolulu partners and officials • State of Hawaii partners and officials • Other Federal Agencies partner representatives • Associations • Others

4. Meeting Goals & Objectives • Introduce NFIP and Risk MAP program • Start a dialogue about your flood risk • Communicate available resources • Offer partnerships and answer questions • Present a current picture of your flood hazards and risks to help you better: • Plan for the risk to increase your flood resilience • Take action to protect your communities • Communicate the risk to your citizens • Understand your needs and prioritize areas needing flood risk study (breakout sessions)

5. Risk MAP Program Overview

6. What is Risk MAP? • Risk Mapping Assessment & Planning (MAP) • Mapping – Flood hazard and risk identification • Assessment – Risk assessment tools and products (HAZUS) • Planning – Community mitigation plans and actions

7. What is Risk MAP? • Vision • Partner with communities to develop flood hazard maps and risk data • Deliver quality data • Promote better public awareness of flood risk • Inspire actions that reduce risk • Benefits • Help communities plan for risk • Facilitate informed decisions about development, codes, resources • Promote communication with citizens about flood risk

8. What is Risk MAP? • Through Risk MAP, FEMA works with communities to develop flood risk products and flood maps that are: • Based on the best available data from the community and latest technologies • Conducted by watershed • Strengthened by partnerships • You can use Risk MAP tools and data to: • Create or improve your mitigation plans • Make informed decisions about development or ordinances • Communicate more effectively about flood risk to citizens

9. Risk Map Project Timeline

10. Flood Risk Assessment Products

11. Program Product Comparisons Traditional Regulatory Products Non-Regulatory Products DFIRM Database Subject to statutory due-process requirements Not subject to statutory due-process requirements

12. Flood Risk Report • Background • Purpose, Methods • Risk Reduction Practices • Project Results • Changes Since Last FIRM • Depth & Analysis Grids • Flood Risk Assessment • Enhanced Analyses • Summarized by Locations • Communities and Watersheds

13. Flood Risk Map • Visually Promotes Risk Awareness • Contains results of Risk MAP project non-regulatory datasets • Promotes additional flood risk data not shown but located within the Flood Risk Database

14. Flood Risk Products • Changes Since Last FIRM • Depth and Analysis Maps • Flood Risk Assessment(HAZUS) • Areas of Mitigation Interest

15. Discovery Process

16. Discovery • Discovery helps determine the areas within your watershed where a flood risk study is needed • During Discovery, we work together to: • Review local flood risk and hazards • Understand local mitigation capabilities, hazard risk assessments, and current or future mitigation activities • Collect information about flooding history, development plans, daily operations, and stormwater and floodplain management activities

17. Discovery Process • Data Collection • Collect information about the communities in the watershed • Develop draft Discovery Map • Meeting • Present potential flood risk products and gather YOUR feedback on these products • Discuss and prioritize areas needing flood risk study • Discuss local planning and communication assistance • Outcome • Finalize Discovery Report and Map based on meeting input • Develop a scope of work and budget for potential Risk MAP projects • Determine available local contributions

18. Flood Risk Data and Discovery Map

19. Major Disasters Declared 1959-2008

20. Mapping History – City and County of Honolulu • Initial Digital Flood Insurance Rate Map (DFIRM) effective September 30, 2004 • Updated DFIRM panels incorporating coastal hurricane study (Kaena Point to Kawaihoa Point) and mapping around levees effective January 19, 2011 • Physical Map Revision (PMR) currently underway • Additional flood insurance study (FIS) to assess flood zones along the Kawainui Stream levee system and portions of Keaahala Stream, Waialae-Nui Stream & 8 other stream reaches. • Incorporate USACE studies along Malaekahana Stream and Keaaulu Gulch

21. Data Sources • State of Hawaii GIS Program – Office of Planning • City and County of Honolulu – Honolulu Land Information System • Mitigation Assessment Study – Prepared for FEMA June 2010 • FEMA Library • NOAA Topographic and Bathymetric Data Inventory • Hawaii State Civil Defense • USGS • Hawaii DAR Watershed Atlas of Hawaiian Watersheds

22. Data Collected to Date • Base Data • Watershed boundaries • Political Boundaries • Parcel Data • Rivers and streams • Transportation files • Orthoimagery • Topographic Data availability • Repetitive loss properties • Stream gauges • Critical facilities • Fire stations • Police stations • Public schools • Hospitals and clinics • Emergency shelters

23. Additional Data Collected to Date • Flood control structures • Land Use Information • Existing and Future land use • Tsunami Evacuation zones • Multi-Hazard Mitigation Plan for the City and County of Honolulu (2010) • Previous flood studies • The number of flood insurance policies and claims within your watershed • Letters of Map Amendment and/or Revision • Average Annualized Loss (AAL) information • Census data • Federal and State disaster information

24. Your Discovery Map

25. Areas of Concern by Geographic Region • Primary Urban Center (includes city of Honolulu) • Projected jobs increase by 22% by 2025 • Projected housing units increase by 25% by 2025 • Ewa • 28,000 new housing units by 2020 • New civic center, schools. Framework of roads and highways planned • Urban expansion of 10,050 acres • Central O’ahu • Population growth from 149,000 in 2000 to 173,000 in 2025 • Additional 11,000 new housing units

26. Areas of Concern - Identified Priority Watersheds • Moanalua • Paukauila (Helamano Drainage Area) • Ki’iki’i (Kaukonahua Drainage Area) • Anahulu River • Wailele • Ma’akua • Kaluanui • Punalu’u • Ka’a’awa • Waikane • Waiahole • Kane’ohe • Kawainui • Makaha • Nanakuli

27. Moanalua Watershed • Moderate rainfall levels • 13 recorded severe floods along Moanalua Stream • Insufficient channel capacity • Restrictive bridges and culverts • Unstable channel banks • Significant Zone D in the watershed • Lower reaches have available LiDAR • Repetitive loss structures in SFHA • Critical facilities in SFHA

28. Moanalua Watershed Potential Mitigation Strategies Identify Flood Hazard in Zone D Stream bank stabilization and/or restoration Replace undersized bridges and culverts In channel maintenance Elevation of critical structures Acquisition of repetitive loss structures

29. Kane’oheWatershed • Moderate rainfall levels • Heavily urbanized • Unregulated development • Large areas of Zone D and Unshaded Zone X • Available LiDAR in lower reaches • Critical facilities along lower reaches of Kaneohe Stream • Inadequate conveyance capacity

30. Kane’oheWatershed Potential Mitigation Strategies Identify Flood Hazard in Unshaded Zone X or Zone D Replace undersized bridges and culverts Flood control project(s) Elevation of critical structures

31. Mitigation Planning

32. Mitigation Planning • Hazard Mitigation Plans: • Can help guide your decisions on mitigation activities for all hazards you face • Are an important resource responsible for responding to disasters • Can help you apply for assistance to take action • Status of Multi-Hazard Mitigation Plan: • Plan lapsed on 9/13/2009

33. Plan Updates and Implementation

34. Hazard Mitigation Plan Updates • Risk MAP flood risk tools can help you enhance the flood portion of your Hazard Mitigation Plans • Provide risk analyses and assessments that can bolster your Plans • Can help you identify and prioritize flood mitigation activities • Mitigation planning resources • A wide range of planning technical assistance is available through Risk MAP • Types of assistance will be determined once we’ve agreed upon areas to be studied

35. Next Steps • Based on today’s discussion, will provide you with: • An updated Discovery Map • A Discovery Report that summarizes the data we collected • Based on our discussion, we will prioritize areas for further study and provide: • A draft project charter that documents the contributions of everyone involved in a possible Risk MAP project • A draft project scope that shows potential areas to be studied • We look forward to continuing to work with you to help create more flood resiliency