Assessment of Vulnerability to Sea Level Rise and Recommended - - PowerPoint PPT Presentation

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Assessment of Vulnerability to Sea Level Rise and Recommended - - PowerPoint PPT Presentation

Sep 08, 2022 40 likes •443 views

Assessment of Vulnerability to Sea Level Rise and Recommended Mitigation Strategies for Pasquotank County Bobby Harris, Radha Patel, Neil Sullivan, Molly Fisher, and Cassy Karlsson Professor David Salvesen Vulnerability Mitigation

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Assessment of Vulnerability to Sea Level Rise and Recommended Mitigation Strategies for Pasquotank County

Bobby Harris, Radha Patel, Neil Sullivan, Molly Fisher, and Cassy Karlsson Professor David Salvesen

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  • Vulnerability
  • Mitigation Strategies
  • Community Rating System (CRS)
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Global Mean Sea Level Rise

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Relative Sea Level Rise Projections (in feet) for Pasquotank County

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Sea Level Rise Vulnerability for Pasquotank County from Climate Central

Unit < 1 ft < 2 ft < 3 ft < 4 ft Property value $ Million 51 139 270 394 Population Count 1,644 3,188 6,082 10,351 Roads Miles 27 52 93 146 Land Acres 17,698 23,860 31,246 39,372

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1 foot Sea Level Rise 2 feet Sea Level Rise

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3 feet Sea Level Rise 4 feet Sea Level Rise

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Southern Pasquotank County by 2100

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Glen Cove by 2050 1 foot SLR

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Glen Cove by ~2070 2 feet SLR

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Glen Cove by ~2100 3 feet SLR

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Bray’s Estates Flood Zones

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Bray’s Estates by 2050

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Bray’s Estates by ~2070

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Bray’s Estates by 2100

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Bray’s Estates by 2100

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Elizabeth City

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Elizabeth City

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Increased Flooding

By 2050:

  • 100-year flood

event will occur every 5 years.

  • Half of county will

be within 100- year floodplain

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Mitigation

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(1) Limit Development in Flood-Prone Areas

  • Increase lot size in new

developments

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Raise freeboard requirements

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(2) Preserve Natural Buffers

  • Establish parks in flood prone areas
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(3) Build Community Awareness

  • Create a Community Flood Awareness Forum
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  • Create signage

(3) Build Community Awareness

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  • 4. Protect Critical Infrastructure

Elevation of Knobbs Creek Road

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Joining the Community Rating System

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National Flood Insurance Program

Annual Flood Premiums

  • Pasquotank County: $725,335
  • Elizabeth City: $966,782
  • Combined $1,692,117
  • As of 2014, subsidies slowly being

removed, predicted price increases

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Community Rating System

  • Participating in CRS gives discounts to

insurance premiums

  • Activities  Points  Discounts
  • CRS communities: Class 10  Class 1
  • 81 communities in North Carolina have

adopted the CRS

  • Prediction of Class 9 or Class 8 for Pasquotank
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CRS Activities

Categories:

  • Public Information
  • Mapping and Regulations
  • Flood Damage Reduction
  • Flood Preparedness

Community Rating System Rate Class Requirements and Discounts Rate Class SFHA* Discounts Credit Points Required 1 45% 4,500 + 2 40% 4,000 – 4,499 3 35% 3,500 – 3,999 4 30% 3,000 – 3,499 5 25% 2,500 – 2,999 6 20% 2,000 – 2,499 7 15% 1,500 – 1,999 8 10% 1,000 – 1,499 9 5% 500 - 999 10 0% 0 - 499

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Class 9 Activity Recommendations

Implemented Activities (Class 9) Activity # Estimated Points Morehead City Points Cost Indication (Free, Low, Med, High) 310 Elevation Certificates ~46-56 56 Already Implemented 320 Map Information Service ~60-140 140 Already Implemented 340 Hazard Disclosure ~10-15 10 Already Implemented 360 Flood Protection Assistance ~50 Already Implemented 440 Flood Data Maintenance ~50-90 86 Already Implemented 450 Storm-Water Management ~30-120 33 Already Implemented 630 Dam Safety ~58 58 Already Implemented No-Cost Points: ~304 – 529 383

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Class 9 Recommendations (cont.)

Recommended Activities (Class 9) Activity # Estimated Points Morehead City Points Cost Indication (Free, Low, Med, High) 330 Outreach Projects ~100-200 212 Low Cost 350 Flood Protection Information ~40-60 56 Low Cost 540 Drainage System Maintenance ~100-170 170 Medium Cost Total: ~544 – 959 821

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Class 9 Annual Savings

Elizabeth City: $48,339 Pasquotank County: $36,267 Combined: $84,706

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Class 8 Recommended Activities

Recommended Activities for Class 8 Certification Activity # Estimated Points Morehead City Points Cost Indication (Free, Low, Med, High) 410 Additional Flood Data ~10-60 11 Low 420 Open Space Preservation ~40-150 48 Medium 430 Higher Regulatory Standards ~120-215 165 Medium 510 Floodplain Management Planning ~70-125 99 Medium 610 Flood Warning Program ~40-140 60 Medium 530 Flood Protection ~60-160 High Total Class 8: ~340-850 383 Grand Total ~884-1809 1204

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Class 8 Annual Savings

Elizabeth City: $96,678 Pasquotank County: $84,606 Combined: $181,284

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Acknowledgements

  • Shelley Cox
  • Julie Stamper
  • Christy Saunders
  • Rich Olson
  • Amy Durden
  • Wayne Harris
  • David Salvesen
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Questions?

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Thank You!