Multi-Hazard Mitigation Plan Lake County Lake County Emergency The Polis Center Management Agency IUPUI 2900 West 93rd Street 1200 Waterway Boulevard Crown Point, Indiana Suite 100 Indianapolis, IN 46202 © Lee Lewellen 46307-1854 Lake County Multi-Hazard Mitigation Plan Adopted: October 2010 Multi-Hazard Mitigation Plan Lake County, Indiana Adoption Date: -- _______________________ -- Primary Point of Contact Jodi Richmond Director Lake County Emergency Management Agency 2900 West 93rd Street Crown Point, Indiana 46307-1854 P: 219-755-3549 F: 219-755-3559 [email protected] Secondary Point of Contact Gerry Scheub Lake County Commissioner 219-755-3055 Prepared by: The Polis Center 1200 Waterway Boulevard, Suite 100 Indianapolis, IN 46202 317-274-2455 Page 2 of 303 Lake County Multi-Hazard Mitigation Plan Adopted: October 2010 Table of Contents 1.0 INTRODUCTION ................................................................................................................ 6 2.0 PREREQUISITES ...................................................................................................................... 8 2.1 MULTI-JURISDICTIONAL PLAN ADOPTION ................................................................. 8 2.2 JURISDICTION PARTICIPATION ...................................................................................... 8 3.0 PLANNING PROCESS ........................................................................................................... 10 3.1 PLANNING TEAM ............................................................................................................. 10 3.2 PUBLIC INVOLVEMENT .................................................................................................. 12 3.3 NEIGHBORING COMMUNITY INVOLVEMENT .......................................................... 12 3.4 REVIEW OF TECHNICAL AND FISCAL RESOURCES ................................................ 12 3.5 REVIEW OF EXISTING PLANS ....................................................................................... 12 4.0 COUNTY PROFILE ................................................................................................................ 14 4.1 TOPOGRAPHY ................................................................................................................... 14 4.2 CLIMATE ............................................................................................................................ 15 4.3 DEMOGRAPHICS ............................................................................................................... 15 4.4 ECONOMY .......................................................................................................................... 16 4.5 INDUSTRY .......................................................................................................................... 16 4.6 COMMUTER PATTERNS .................................................................................................. 17 4.7 LAND USE AND DEVELOPMENT TRENDS .................................................................. 17 4.8 MAJOR LAKES, RIVERS, AND WATERSHEDS ............................................................ 20 5.0 RISK ASSESSMENT .............................................................................................................. 22 5.1 IDENTIFYING HAZARDS ................................................................................................. 22 5.1.1 Existing Plans ................................................................................................................ 22 5.1.2 National Climatic Data Center (NCDC) Records ......................................................... 22 5.1.3 Hazard Ranking Methodology ...................................................................................... 23 5.1.4 GIS and HAZUS-MH .................................................................................................... 29 5.2 ASSESSING VULNERABILITY ........................................................................................ 30 5.2.1 Essential Facilities List .................................................................................................. 31 5.2.2 Facility Replacement Costs ........................................................................................... 31 5.3 PROFILING HAZARDS ..................................................................................................... 32 5.3.1 TORNADO HAZARD .................................................................................................. 32 HAZUS-MH Tornado Analysis ........................................................................................ 35 Tornado Analysis in Northern Lake County ................................................................... 37 Tornado Analysis in Southern Lake County ................................................................... 41 5.3.2 FLOOD HAZARD ........................................................................................................ 45 HAZUS-MH Analysis Using 100-Year Flood Boundary and County Parcels ................. 51 Lake County (Incorporated and Unincorporated) .......................................................... 52 Page 3 of 303 Lake County Multi-Hazard Mitigation Plan Adopted: October 2010 Town of Cedar Lake ........................................................................................................ 56 City of Crown Point ........................................................................................................ 58 Town of Dyer .................................................................................................................. 60 City of East Chicago ....................................................................................................... 62 City of Gary .................................................................................................................... 65 Town of Griffith .............................................................................................................. 68 City of Hammond ............................................................................................................ 71 Town of Highland ........................................................................................................... 75 City of Hobart ................................................................................................................. 78 City of Lake Station ......................................................................................................... 80 Town of Lowell ................................................................................................................ 82 Town of Merrillville ........................................................................................................ 84 Town of Munster ............................................................................................................. 86 Town of New Chicago ..................................................................................................... 89 Town of Schererville ....................................................................................................... 90 Town of Schneider .......................................................................................................... 93 Town of St. John .............................................................................................................. 95 City of Whiting ................................................................................................................ 97 Town of Winfield ............................................................................................................. 97 5.3.3 EARTHQUAKE HAZARD ........................................................................................ 100 HAZUS-MH Earthquake Analysis .................................................................................. 107 Results for 7.1 Magnitude Earthquake Wabash Valley Scenario ................................. 107 Results for 5.5 Magnitude Earthquake in Lake County ................................................ 109 Results 5.0 Magnitude 500-Year Probabilistic Scenario .............................................. 111 Results Annualized Risk Scenario ................................................................................. 112 5.3.4 THUNDERSTORM HAZARD ................................................................................... 112 5.3.5 WINTER STORM HAZARD ..................................................................................... 124 5.3.7 HAZARDOUS MATERIALS RELEASE HAZARD ................................................ 129 HAZUS-MH Hazardous Materials Release Analysis ..................................................... 132 East Chicago Analysis .................................................................................................. 132 Gary/Hammond Analysis .............................................................................................. 142 5.3.8 FIRE HAZARD ........................................................................................................... 150 6.0 MITIGATION STRATEGIES ............................................................................................... 155 6.1 COMMUNITY CAPABILITY ASSESSMENT ................................................................ 155 6.1.1 NATIONAL FLOOD INSURANCE PROGRAM (NFIP) ......................................... 155 6.1.2 PLANS