Table of Contents Chapter One: Hazard Mitigation Planning - An Introduction Mitigation Planning as Part of the Larger Emergency Management Picture........................................................................ 9 Robert T. Stafford Disaster Relief and Emergency Assistance Act (Stafford Act).............................................................. 11 Hazard Mitigation Funds....................................................................................................................................................... 11 Disaster Mitigation Act of 2000............................................................................................................................................ 13 44 CFR, Part 201.6................................................................................................................................................................ 13 Chapter Two: Mitigation Plan Foundation Definitions............................................................................................................................................................................. 14 Countywide Hazard Mitigation Goals................................................................................................................................... 14 Benefits of the Plan................................................................................................................................................................ 16 Chapter Three: Planning Process & Content Planning Team....................................................................................................................................................................... 17 Work Plan.............................................................................................................................................................................. 17 Hazard Identification and Analysis....................................................................................................................................... 18 Risk Assessment.................................................................................................................................................................... 20 Development of Mitigation Strategies................................................................................................................................... 22 Plan Monitoring and Maintenance......................................................................................................................................... 23 Plan Adoption........................................................................................................................................................................ 23 Public Involvement................................................................................................................................................................ 23 11/2013 Page 1 Chapter Four: Community Profile Carroll County Geography and Physical Environment......................................................................................................... 26 Carroll County Demographics............................................................................................................................................... 27 Relationship between County and Municipalities................................................................................................................. 30 Relationship between Hazard Mitigation Planning and Comprehensive Planning............................................................... 31 Maps: Carroll County Master Plan 2000: Land Use Designation Map (as amended).................................................................. 33 Hampstead Designated Land Use......................................................................................................................................... 34 Manchester Designated Land Use......................................................................................................................................... 35 Mount Airy Designated Land Use......................................................................................................................................... 36 New Windsor Designated Land Use...................................................................................................................................... 37 Sykesville/Freedom Designated Land Use............................................................................................................................ 38 Taneytown Designated Land Use.......................................................................................................................................... 39 Union Bridge Designated Land Use...................................................................................................................................... 40 Westminster Designated Land Use........................................................................................................................................ 41 Existing Use of Land: Carroll County, Maryland................................................................................................................ 42 Existing Use of Land: Hampstead Growth Area.................................................................................................................. 43 Existing Use of Land: Manchester Growth Area.................................................................................................................. 44 Existing Use of Land: Mount Airy Growth Area.................................................................................................................. 45 Existing Use of Land: New Windsor Growth Area............................................................................................................... 46 Existing Use of Land: Sykesville/Freedom Growth Area..................................................................................................... 47 Existing Use of Land: Taneytown Growth Area................................................................................................................... 48 Existing Use of Land: Union Bridge Growth Area............................................................................................................... 49 Existing Use of Land: Westminster Growth Area................................................................................................................. 50 Chapter Five: Drought Hazard Identification............................................................................................................................................................. 52 Risk Assessment.....................................................................................................................................................................54 Existing Mitigation Measures................................................................................................................................................ 59 Proposed High-Priority Mitigation Strategies....................................................................................................................... 61 Lower-Priority Mitigation Measures for Future Consideration............................................................................................. 62 11/2013 Page 2 Chapter Six: Flooding (Flash/Riverine) Hazard Identification............................................................................................................................................................. 64 Risk Assessment.................................................................................................................................................................... 67 Existing Mitigation Measures................................................................................................................................................ 71 Proposed High-Priority Mitigation Strategies....................................................................................................................... 74 Lower-Priority Mitigation Measures for Future Consideration............................................................................................ 76 Maps: Hazard High-Impact Area for Riverine/Flash Flooding: 100-Year Floodplains by Watershed (countywide map)............77 Hazard High-Impact Area for Riverine/Flash Flooding: 100-Year Floodplain – Double Pipe Creek Watershed..............78 Hazard High-Impact Area for Riverine/Flash Flooding: 100-Year Floodplain – Liberty Reservoir.................................. 79 Hazard High-Impact Area for Riverine/Flash Flooding: 100-Year Floodplain – Lower Monocacy Watershed................ 80 Hazard High-Impact Area for Riverine/Flash Flooding: 100-Year Floodplain – S Branch Patapsco Watershed............. 81 Hazard High-Impact Area for Riverine/Flash Flooding: 100-Year Floodplain – Upper Monocacy Watershed................ 82 Hazard High-Impact Area for Riverine/Flash Flooding: 100-Year Floodplain – Prettyboy Reservoir Watershed............ 83 Hazard High-Impact Area for Riverine/Flash Flooding: 100-Year Floodplain – Loch Raven Reservoir Watershed......... 84 Chapter Seven: Hurricane Hazard Identification............................................................................................................................................................. 85 Risk Assessment...................................................................................................................................................................