Winnebago County Multi-Hazard Mitigation Plan June 24, 2014 Multi-Hazard Mitigation Plan Winnebago County, Illinois Adoption Date: -- _______________________ -- Primary Point of Contact Secondary Point of Contact Joseph A. Vanderwerff, Sr. PE Donald L. Krizan County Engineer Civil Engineer Senior Winnebago County Highway Department Winnebago County Highway Department 424 N. Springfield Avenue 424 N. Springfield Avenue Rockford, IL 61101-5097 Rockford, IL 61101-5097 Phone: (815) 319-4000 Phone: (815) 319-4000 Email: [email protected] Email: [email protected] Prepared by Natural Hazards and Research Mitigation Group Department of Geology Southern Illinois University Carbondale 1259 Lincoln Drive Carbondale, IL 62901 Winnebago County Multi-Hazard Mitigation Plan June 24, 2014 Acknowledgements The Winnebago County Multi-Hazard Mitigation Plan would not have been possible without the incredible feedback, input, and expertise provided by the County leadership, citizens, staff, federal and state agencies, and volunteers. We would like to give special thank you to the hundreds of citizens not mentioned below who freely gave their time and input in hopes of building a stronger, more progressive County. Winnebago County gratefully acknowledges the following people for the time, energy and resources given to create the 2014 Multi-Hazard Mitigation Plan. Winnebago County Board Scott H. Christiansen, Chair Dianne Parvian Ted Biondo Dorothy Reed Dave Fiduccia Julio Salgado Burt Gerl Steve Schultz Angie Goral Lynne Strathman John Guevara John F. Sweeney Joe Hoffman Dave Tassoni Gary Jury Jim Webster Dave Kelley Fred Wescott Kyle Logan L.C. Wilson Kay Mullins 2014 Multi-Hazard Mitigation Plan Steering Committee Joseph Corl - Division Chief, Operations Division, Rockford Fire Department Jamie Evans - Chief, Police Department, Village of Roscoe Marcy Leach - Engineering Operations Manager, Public Works Department, City of Rockford Thaddeus Mack - Planner, Construction & Development Services, City of Rockford Jim Wise - Village Administrator, Village of Cherry Valley Don Krizan - Civil Engineer Senior, Highway Department, Winnebago County ii Winnebago County Multi-Hazard Mitigation Plan June 24, 2014 Table of Contents Section 1. Introduction .............................................................................................................................. 1 Section 2. Planning Process ........................................................................................................................ 2 2.1 Timeline ......................................................................................................................................... 2 2.2 Planning Team Information ........................................................................................................... 2 2.3 Public Involvement ........................................................................................................................ 4 2.4 Neighboring Community Involvement .......................................................................................... 4 2.5 Review of Technical Documents .................................................................................................... 4 2.6 Review of Existing Plans ................................................................................................................ 5 2.7 Jurisdiction Participation Information ........................................................................................... 5 2.8 Adoption by Local Government ..................................................................................................... 6 2.9 Jurisdiction Participation ............................................................................................................... 6 Section 3. County Profile ............................................................................................................................ 7 3.1 County Background ....................................................................................................................... 7 3.2 Topography ................................................................................................................................... 9 3.3 Climate .......................................................................................................................................... 9 3.4 Demographic ............................................................................................................................... 10 3.5 Economy ...................................................................................................................................... 10 3.6 Industry ....................................................................................................................................... 11 3.7 Land Use and Development Trends............................................................................................. 11 3.8 Major Lakes, Rivers, and Watersheds .......................................................................................... 13 Section 4. Risk Assessment ...................................................................................................................... 16 4.1 Hazard Identification ................................................................................................................... 16 4.1.1 Existing Plans ....................................................................................................................... 16 4.1.2 National Hazard Records ..................................................................................................... 16 4.1.3 FEMA Disaster Information ................................................................................................. 17 4.1.4 Hazard Ranking Methodology ............................................................................................. 19 4.1.5 Risk Priority Index ................................................................................................................ 19 4.1.6 Jurisdictional Hazard Ranking .............................................................................................. 21 4.1.7 GIS and Hazus-MH ............................................................................................................... 21 4.2 Vulnerability Assessment ............................................................................................................ 22 4.2.1 Asset Inventory .................................................................................................................... 22 iii Winnebago County Multi-Hazard Mitigation Plan June 24, 2014 4.3 Future Developments .................................................................................................................. 23 4.4 Hazard Profile .............................................................................................................................. 23 4.4.1 Flooding Hazard ................................................................................................................... 23 4.4.2 Thunderstorm Hazard ......................................................................................................... 30 4.4.3 Tornadoes Hazard ............................................................................................................... 33 4.4.4 Hazardous Material Storage and Transportation Hazard .................................................... 42 4.4.5 Winter Storm Hazard ........................................................................................................... 53 4.4.6 Drought and Extreme Heat Hazard ..................................................................................... 55 4.4.7 Dam Failure ......................................................................................................................... 58 4.4.8 Earthquake Hazard .............................................................................................................. 60 Section 5. Mitigation Strategies ............................................................................................................... 69 5.1 Community Capability Assessment ............................................................................................. 69 5.1.1 National Flood Insurance Program (NFIP) ........................................................................... 69 5.1.2 Jurisdiction Ordinances ....................................................................................................... 70 5.1.3 Fire Insurance Ratings ......................................................................................................... 70 5.2 Mitigation Goals .......................................................................................................................... 71 5.3 Mitigation Actions/Plans ............................................................................................................. 72 5.4 Implementation and Analysis of Mitigation Projects ................................................................... 73 5.5 Multi-Jurisdictional Mitigation Strategy ...................................................................................... 79 Section 6. Plan Maintenance.................................................................................................................... 80 6.1 Monitoring, Evaluation, and Updating the MHMP ...................................................................... 80 6.2