Pre-Disaster Natural Hazard Mitigation Plan Guilford, Connecticut History of Hazard Mitigation Planning Authority Disaster Mitigation Act of 2000 (ame

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6 Pre-Disaster Natural Hazard Mitigation Plan Guilford, Connecticut History of Hazard Mitigation Planning Authority Disaster Mitigation Act of 2000 (amendments to Stafford Act of 1988) Presented by: David Murphy, P.E. Associate Milone & MacBroom, Inc. Goal of Disaster Mitigation Act Encourage disaster preparedness Encourage hazard mitigation measures to reduce losses of life and property Photos by David Murphy, John Henningson, and Sid Gale or as noted September 23, 2010 History of Hazard Mitigation Planning Local municipalities must have a FEMAapproved Hazard Mitigation Plan in place to receive Federal Grant Funds for Hazard Mitigation Projects PDM (Pre-Disaster Mitigation) HMGP (Hazard Mitigation Grant Program) FMA (Flood Mitigation Assistance) RFC (Repetitive Flood Claims) SRL (Severe Repetitive Loss) History of Hazard Mitigation Planning State Description Grant Connecticut $641,025 Home elevations Connecticut Culvert replacement $500,000 Connecticut Home acquisition $411,000 Connecticut East Haven home elevation $75,206 Connecticut Home elevation $64,575 Connecticut Home elevation $56,700 Maine Floodplain acquisition and structure removal $2,157,678 Massachusetts Downtown flood mitigation/culvert replacement $3,000,000 Massachusetts Pond flood hazard project $1,745,700 Massachusetts Flood hazard mitigation project $1,079,925 Massachusetts Culvert project $525,000 Massachusetts Housing elevation and retrofit $473,640 Massachusetts Housing elevation and retrofit $449,935 Massachusetts Road mitigation project $186,348 Massachusetts Flood mitigation project $145,503 New Hampshire Water planning for firefighting $134,810 New Hampshire Culvert project $112,500 New Hampshire Box culvert project $102,000 New Hampshire Culvert project $72,750 New Hampshire Dry hydrants $15,251 New York Beach road elevation $1,792,521 New York Subdivision utilities: overhead to underground $300,767 New York WWTP Floodwall construction $223,200 New York Culvert project $122,664 Vermont Fluvial erosion risk assessment $337,498 Vermont Road mitigation project $140,441 Vermont Inundation & erosion controls to a public building $99,188 1

7 What is a Natural Hazard? What is Hazard Mitigation? An extreme natural event that poses a risk to people, infrastructure, and resources Pre-disaster actions that reduce or eliminate long-term risk to people, property, and resources from natural hazards and their effects Long-Term Goals of Hazard Mitigation What a Hazard Mitigation Plan Does Not Address Reduce loss of life and damage to property and infrastructure Reduce the cost to residents and businesses Educate residents and policy-makers about natural hazard risk and vulnerability Connect hazard mitigation planning to other community planning efforts Enhance and preserve natural resource systems in the community Terrorism and Sabotage Disaster Response and Recovery Human Induced Emergencies (some fires, hazardous spills and contamination, disease, etc.) 2

8 Components of Hazard Mitigation Planning Process Identify natural hazards that could occur in Guilford Evaluate the vulnerability of structures and populations and identify critical facilities and areas of concern Assess adequacy of mitigation measures currently in place such as regulations and emergency services Evaluate potential mitigation measures that could be undertaken to reduce risk and vulnerability Develop recommendations for future mitigation actions Critical Facilities Community Center Surge zone for Category 4 hurricanes as defined by USACE High School Guilford s secondary shelter Critical Facilities Fire Stations & Fire Headquarters 4 Graves Avenue Surge zone for Category 3 & 4 hurricanes 120 Whitfield Street Surge zone for Category 3 hurricanes 51 Water Street Flood Zone B and surge zone for Category 3 hurricanes 3087 Durham Road (North Guilford) Police Station Critical Facilities Police Station Town Hall & Emergency Operations Center Both are within the surge zone for Category 4 Hurricanes Public Works Facility Flood Zones A & B Surge zone for Category 1-3 hurricanes Nursing Homes, Assisted Living Facilities and Senior Communities 3

9 Potential Mitigation Categories Potential Mitigation Measures Structural Projects Property Protection Prevention Emergency Services Natural Resource Protection Public Education Elevate or remove flood-prone buildings Move critical facilities from flood zone Strengthen or reinforce the shelters Remove and replace undersized and/or failing bridges and culverts Replace overhead utilities with underground utilities Organize tree maintenance priorities and scheduling Enhance fire suppression capabilities Public education programs dissemination of public safety information Primary Natural Hazards Facing Guilford Inland flooding Coastal flooding, sea level rise, shoreline change, erosion Hurricanes and tropical storms Summer storms and tornadoes Winter storms and nor'easters Earthquakes Wildfires Dam failure Rock slides Inland Flooding Heavy rain Low-lying roads Undersized culverts Low bridges Poor storm drainage networks 4

10 Coastal Flooding Shoreline Change & Erosion High tides Storm surge Erosion of marshes Erosion of beaches Shoreline migration Sea Level Rise Sea Level Rise Accelerated coastal erosion Inundation Increased incidence of flooding 5

11 Hurricanes and Tropical Storms Hurricanes and Tropical Storms Winds Heavy rain / flooding Storm Surge Summer Storms and Tornadoes Heavy wind Tornadoes Wethersfield in 2009 Bridgeport in 2010 Downbursts Lightning Heavy rain Hail Downed trees Winter Storms and Nor'easters Blizzards and nor easters Coastal flooding Heavy snow and drifts Freezing rain / ice Downed trees 6

12 Earthquakes Wildfires Chester, CT experienced a small, 2.0 magnitude earthquake on March 11, 2008 Can cause dam failure Shaking Liquefaction Secondary (Slides/Slumps) Fire Heat Smoke April is the month of maximum risk in Connecticut Photos courtesy of FEMA and the Town of Sherman, CT Photos courtesy of FEMA Dam Failure Severe rains or earthquakes can cause failure Possibility of loss of life and millions of dollars in property damage 25 registered dams in Guilford Area-Specific Problems Critical Roads Subject to Flooding Coastal Structures Subject to Flooding Neighborhoods Subject to Isolation Eroding Tidal Marshes and Beaches Neighborhoods Vulnerable to Sea Level Rise Inland Repetitive Loss Properties Other Inland Flooding Areas Areas of Frequent Utility Outages Areas of Impaired Fire Suppression Recent dam failure in Sherman, CT Washed out road in RI 7

13 Critical Roads Subject to Flooding Route 146 Old Quarry Road Shell Beach Road Vineyard Point Road Sachems Head Road at Route 146 Critical Roads Subject to Flooding Indian Cove Road Chaffinch Island Road River Street Seaside Avenue Soundview Road Coastal Structures Subject to Flooding Repetitive Loss Properties Whitfield Street (2) Rock Point Lane (1) Marina Area Coastal Structures Subject to Flooding Many Coastal Neighborhoods 8

14 Neighborhoods Vulnerable to Isolation Eroding Tidal Marshes & Beaches Old Quarry Sachems Head Little Harbor Leetes Island Vineyard Point Indian Cove Mulberry Point Tuttles Point Neighborhoods Vulnerable to Sea Level Rise Shell Beach Road Trolley Road Seaside Avenue and Seaview Terrace Meadow Street Streets west of Whitfield Street Horseshoe Road Soundview Road Industries Inland Repetitive Loss Properties West Lake Shore Road Guilford Lakes Lakeside Drive West River Corridor & Tributaries Highwoods Road Durham Road Race Hill Road Mill Road Joan Drive Little Meadow Road 9

15 Other Inland Flooding Areas Flag Marsh Road Long Hill Road Lake Drive South of Quonnipaug Areas of Frequent Utility Outages Much of the Town is Susceptible Some Areas are Notable: Vineyard Point Indian Cove Mulberry Point Tuttles Point Photos courtesy of FEMA Areas of Impaired Fire Suppression Forested Areas in North Guilford Dense Neighborhoods Tuttles Point Mulberry Point Indian Cove Areas of Marsh Vegetation Next Steps Incorporate input from residents Rank hazard vulnerabilities Develop mitigation strategies Prepare the draft plan with recommendations for review by the Town and the public Adopt and implement the plan 10

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