Jersey County Natural Hazards Mitigation Plan December 2015 Originally Published February 2008 2015 Jersey County Hazard Mitigation Plan TABLE OF CONTENTS Page Number: Plan Overview……………………………………………………………………PO-1 CHAPTER 1 ......................................................................................................... 1-1 1.1. Introduction ..................................................................................................... 1-1 1.2 Jersey County Profile ..................................................................................... 1-2 1.3 Planning Process ............................................................................................. 1-8 1.4 References…………………………………………………………………....1-18 CHAPTER 2 – Risk Assessment ........................................................................ 2-1 2.1. Overbank Flooding ......................................................................................... 2-1 2.2. Flood Profile ................................................................................................... 2-6 2.3. Severe Thunderstorms .................................................................................... 2-31 2.4. Severe Winter Storms ..................................................................................... 2-36 2.5. Tornadoes ....................................................................................................... 2-40 2.6. Earthquakes .................................................................................................... 2-44 2.7. Drought ........................................................................................................... 2-47 2.8. Extreme Heat .................................................................................................. 2-49 2.9. Wildfires, Landslides, and Erosions………………………………………….2-50 - 2.10.Summary of Hazards…………………………………………………………2-57 2.11 Impact……………………………………………………………………...…2.57 2.12 References……………………………………………………………………2-58 CHAPTER 3 - Hazard Mitigation Goals ........................................................... 3-1 3.1. Goals and Objectives ...................................................................................... 3-1 3.2. Goals and Guidelines ...................................................................................... 3-3 3.3. Periodic Studies, Surveys and Involvement of the Public .............................. 3-4 3.4. Review and Reaffirmation of Hazard Mitigation Goals ................................. 3-15 3.5 Re-Affirmed Goals ......................................................................................... 3-18 3.6 References…………………………………………………………………….3-20 CHAPTER 4 – Preventive Measures ................................................................. 4-1 4.1. Building Codes ............................................................................................... 4-1 4.2. Manufactured Homes ..................................................................................... 4-3 4.3. Subdivision Regulations ................................................................................. 4-4 4.4. Code Enforcement and Administration .......................................................... 4-5 4.5. Planning .......................................................................................................... 4-5 4.6. Retrofitting for Multiple Hazards ................................................................... 4-10 4.7. Insurance ........................................................................................................ 4-8 4.8. The Government’s Role ................................................................................. 4-10 4.9. Conclusions .................................................................................................... 4-13 4.10.Recommendations .......................................................................................... 4-13 CHAPTER 5 – Property Protection ................................................................... 5-1 5.1. Keeping the Hazard Away ............................................................................. 5.1 5.2. Retrofitting ..................................................................................................... 5-3 5.3. Building Retrofitting ...................................................................................... 5-5 5.4. Insurance ........................................................................................................ 5-7 5.5 Recommendations .......................................................................................... 5-9 5.7 References ...................................................................................................... 5-7 CHAPTER 6 – Natural Resource Protection ..................................................... 6-1 6.1. Introduction .................................................................................................... 6-2 6.2. Floodplain and Storm Water Management ..................................................... 6-3 6.3. Flash Flooding and Drainage System Maintenance ....................................... 6-2 6.4. Dams and Levees ............................................................................................ 6-3 6.5. Erosion and Sedimentation Control ................................................................ 6-5 6.6. Wetland Protection ......................................................................................... 6-8 6.7. River and Stream Restoration ......................................................................... 6-8 6.8. Open Space Preservation ................................................................................ 6-9 6.9. Farmland Protection ....................................................................................... 6-8 6.10 Best Management Practices ............................................................................ 6-11 6.11 Dumping Regulations. .................................................................................... 6-12 6.12 Urban Forestry ................................................................................................ 6-11 6.13 Watershed Planning ........................................................................................ 6-12 6.14 Recommendations .......................................................................................... 6-15 6.15 References……………………………………………………………………6-16 CHAPTER 7 – Emergency Warning and Response ......................................... 7-1 7.1. Introduction ..................................................................................................... 7-1 7.2. Threat Recognition and Warning .................................................................... 7-1 7.3. General Information ........................................................................................ 7-3 7.4. Emergency Response....................................................................................... 7-5 7.5. Critical Facilities Protection ............................................................................ 7-6 7.6. Post – Disaster Recovery and Mitigation ........................................................ 7-7 7.7. Recommendations ........................................................................................... 7-8 7.8 References…………………………………………………………………….7-8 CHAPTER 8 – Public Information .................................................................... 8-1 8.1. Community Newsletter/Direct Mailing ........................................................... 8-1 8.2. Technical Information ..................................................................................... 8-2 8.3. Public Information Program Strategy .............................................................. 8-3 8.4. Public Information Summary .......................................................................... 8-3 8.5. References ....................................................................................................... 8-5 CHAPTER 9 – Action Plan ................................................................................ 9-1 9.1. Goals ................................................................................................................ 9-2 9.2. Guidelines ........................................................................................................ 9-2 9.3 Identified Action Items………………………………………. ...………….. 9-3 9.4 Administrative Action ………………………………………………………..9-4 9.5 Plan Maintenance……………………………………………………………..9-9 Plan Overview Jersey County is susceptible to natural hazards that threaten life, health and has caused heavy property damage. While the county has experienced its share of damage from tornadoes, straight line winds and flash flooding, the most devastating and prolonged flood of 1993 stands without equal. Jersey County is positioned at the crossroads of three mighty rivers, the Mississippi, Missouri and the Illinois. The county found itself at the center of a historic flood. In 2003, Jersey County and participating municipalities banded together to better understand the hazards that effect the county and the impact they have on the residents and their property. In 2008 a Plan was developed to identify ways to reduce those impacts. The Federal Emergency Management Agency (FEMA), through the Disaster Mitigation Act of 2000 and the Stafford Act 1require that a community develop and adopt a FEMA approved natural hazard mitigation