The City and Borough of Juneau All-Hazards Mitigation Plan 2009 FINAL November 1, 2009 The City and Borough of Juneau All-Hazards Mitigation Plan Table of Contents SECTION 1: PLANNING PROCESS AND METHODOLOGY ................................................... 1 PLAANN DEVVEELOOPPMMEENNTT ................................................................................................................11 Plan Scope ...........................................................................................................................................................1 Project Staff .........................................................................................................................................................2 Plan Coordination................................................................................................................................................3 Plan Research ......................................................................................................................................................3 Public Involvement.............................................................................................................................................55 Plan Implementation..........................................................................................................................................55 Continuing Review Process................................................................................................................................66 Continued Plan Development ............................................................................................................................66 RISK ASSESSMMEENNTT METTHODOLHODOLOOGYGY ............................................................................................. 6666 Vulnerability Assessment Methodology ...............................................................................................................8 Federal Requirements for Risk Assessment........................................................................................................10 Economic Analysis .............................................................................................................................................10 SECTION 2: COMMUNITY PROFILE ............................................................................. 12 COOMMUNIMMUNITTYY OVVEERRVIVIEW ..........................................................................................................1122 COOMMUNIMMUNITTYY ASSETTSS ..............................................................................................................1144 COOMMUNIMMUNITTYY RESOOURCEURCES .........................................................................................................1166 Federal Resources..............................................................................................................................................16 State Resources ..................................................................................................................................................19 Other Funding Sources and Resources..............................................................................................................19 Local Resources .................................................................................................................................................19 SECTION 3: HAZARDS ................................................................................................. 24 AVVALALAANCHENCHE ........................................................................................................................2255 Hazard Description and Characterization.........................................................................................................25 Local Avalanche Hazard Identification .............................................................................................................28 Avalanche Hazard Vulnerability........................................................................................................................37 Avalanche Mitigation.........................................................................................................................................43 LAANDSNDSLIDDEES.........................................................................................................................4466 Hazard Description and Characterization.........................................................................................................46 Local Landslide Hazard Identification ..............................................................................................................49 Local Landslide Vulnerability............................................................................................................................52 Landslide Mitigation..........................................................................................................................................58 FIRREE IN DOOWNTOWNWNTOWN JUUNENEAAUU..................................................................................................... 6600 Hazard Description and Characterization.........................................................................................................60 Local Fire Hazard Identification .......................................................................................................................62 FINAL City and Borough of Juneau All-Hazards Mitigation Plan, Revised December 9, 2009 ii Fire Hazard Vulnerability..................................................................................................................................65 Downtown Fire Mitigation.................................................................................................................................69 EAARTHQUAKERTHQUAKES......................................................................................................................7711 Hazard Description and Characterization.........................................................................................................71 Local Earthquake Hazard Identification............................................................................................................73 Earthquake Hazard Vulnerability ......................................................................................................................75 Earthquake Mitigation .......................................................................................................................................76 SEVVEERREE WEAATHETHER ..................................................................................................................7777 Hazard Description and Characterization.........................................................................................................77 Local Severe Weather Hazard Identification .....................................................................................................83 Severe Weather Hazard Vulnerability................................................................................................................85 Severe Weather Mitigation............................................................................... 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Bookmark not defined.86 FLOOODSODS..............................................................................................................................8888 Hazard Description and Characterization.........................................................................................................88 Local Flood Hazard Identification.....................................................................................................................91 Flood Hazard Vulnerability ...............................................................................................................................95 Flood Mitigation ................................................................................................................................................95 WILDDLLAANDND FIRREE ....................................................................................................................9988 Hazard Description and Characterization.........................................................................................................98 Local Wildland Fire Hazard Identification......................................................................................................101 Wildland Fire Hazard Vulnerability ................................................................................................................102 Wildland Fire Mitigation .................................................................................................................................102 TSUUNAMINAMIS AANDND SEICCHEHES ........................................................................................................ 110404 Hazard Description and Characterization.......................................................................................................104 Local Tsunami Hazard Identification ..............................................................................................................105 Tsunami Hazard Vulnerability.........................................................................................................................106 Tsunami Mitigation..........................................................................................................................................106