MV Hospital - Climate Vulnerability Assessment and Route Prioritization

Martha’s Vineyard Hospital Resilience Project Climate Vulnerability Assessment and Route Prioritization Advisory Committee Meeting ~ February 14, 2024

Our Team Dean Audet, PE Senior Vice President, Fuss & O’Neill Technical Advisor 30+ Years of Experience • Flood Resilience • Stormwater Management • Nature-based Solutions

Brittany Hoffnagle Climate Resilience, Woods Hole Group Route Analysis 8+ Years of Experience • Climate Resilience Planning • GIS • Route Analysis

Eileen Gunn, AICP Associate, Fuss & O’Neill Project Manager 30+ Years of Experience • Climate Resilience PM • Transportation Planning • Grant Management

Connor Agro, PE Transportation Engineer Conceptual Design 5+ Years of Experience • Roadway Design • Complete Streets • Safety Analysis Adam Finkle, BS, MS Coastal Scientist, Woods Hole Group Nature-based Solutions 10+ Years of Experience • Ecological Restoration • Bioengineering • Coastal Resiliency

Pat Tierney, PE Transportation Engineer Conceptual Design 10+ Years of Experience • Roadway Design • Climate Resilience • Safety Analysis

Joseph Famely, MEM Senior Environmental Scientist, Woods Hole Group Vulnerability, Resilience 20 Years of Experience • Sustainability Planning • Risk Management • MVP Trainer

Agenda 1. Project Status/Schedule Update – 15 min a. Survey Results - Common Routes/Criticality Parameters

2. Vulnerability Assessment Recap and Discussion –20min 3. Route Analysis Presentation -25 min a. Discussion/Prioritization - 40 min

4. Next Steps – 10min a. Feasibility analysis -Four prioritized Routes b. Next Advisory meeting

Project Overview The goal of this project is to make transportation access to the hospital more resilient during current and future flooding events associated with sea level rise and storm surge.

• Provide an understanding of the current and projected flood risk along the key transportation routes used by EMS to access the hospital; • Gain an understanding of critical care service needs; • Conduct alternative route analysis; feasibility of road raising; and analysis of nature-based solutions to reduce risk; and

• Design conceptual level roadway adaptation alternatives for a more resilient transportation network.

Meeting Objective The objectives of this meeting are to: • Provide an understanding of the current and projected flood risk along the key transportation routes used by EMS to access the hospital; • Present the Route Analysis results and Critical Factors for decisionmaking; • And, have the Advisory Committee come to consensus on Four Prioritized Route Segments for the next project phase – feasibility analysis (risk reduction).

Project Area The project limits include the following major routes that serve the hospital and where access is threatened: • Barnes Road • Wing Road • County Road • Eastville Avenue • Temahigan Road • New York – Lake Avenue • Circuit Avenue • Dukes County Avenue • Beach Road (at Eastville Beach and Hospital Entrance)

Criticality Factors for Prioritizing 1. Response Times – (Any additional time is undesirable) 2. Critical Routes – Next slide 3. Detour Routes (Travel Time)

4. Fleet Vehicle Thresholds (driving thru flooded conditions) – 8in 5. Vulnerability (Storms and Future “Sunny Day” flooding) ✓ Depth of Flooding ✓ Duration of Flooding ✓ Length of Road Segment Flooded

Island-Wide EMS Critical Routes Summary Tri-town (and Chilmark) EMS Routes –

State - Five Corners -Beach Road

Old County – State – Five Corners -Beach Rds

Edgartown-West Tisbury–Barnes –County–Eastville -Beach Rds Five Corners Detour – Edgartown-Vineyard HavenBarnes…, or County to Eastville- Beach or Back Entrance

Island-Wide EMS Critical Routes Summary Oak Bluffs EMS Routes –

County-Eastville-Beach Rd

New York to Temahigan – Beach Rd

Beach Rd Detour – Back Hospital Entrance

Island-Wide EMS Critical Routes Summary Edgartown EMS Routes –

Edgartown-Vineyard Haven-County-Eastville-Beach Rds.

TROPICAL / EXTRATROPICAL STORMS

SEA LEVEL RISE

LANDSCAPE

Includes relevant physical processes: sea level rise, tides, storm surge, wind, wave setup / run-up / overtopping, future climate scenarios

PROBABILISTIC / HYDRODYNAMIC MODEL

FLOOD PROBABILITY

FLOOD DEPTH

CHANGING CLIMATE

ELEVATION

Future version to incorporate coastal erosion

FLOOD DURATION

FLOOD VOLUMES

FLOOD PATHWAYS

WINDS

WAVES

CURRENTS

OUTPUTS

INPUTS

Massachusetts Coast Flood Risk Model (MC-FRM)

10 0%

50 %

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Vulnerability Assessment Recap

2030

50 %

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Flood Probability Assessment Methods

10 0%

COASTAL FLOOD EXCEEDANCE PROBABILITY

2030 Roadway Vulnerability

2050 Roadway Vulnerability

2070 Roadway Vulnerability

2030 Ambulance Flood Restrictions

H

2030 1% AEP Flood Residence Time

MC-FRM Annual Coastal Flood Exceedance Probability

MC-FRM Annual Coastal Flood Exceedance Probability

Road Network Analysis Parameterization

Priority Hospital Routes – no flooding

Hospital Route Flood Impact Summary

Oak Bluffs Ferry

3:57

2:57

4:31

East Chop Road

2:44

2:58

3:00

Harthaven

7:17

0:31

2:42

Barnes Road

7:14

0:30

5:28

Edgartown-West Tisbury Road

11:00

0:30

5:06

County Road (North at Wing Rd)

2:54

0:30

4:06

County Road (South at E-VH Rd)

6:54

0:30

3:54

Edgartown (Upper Main St)

13:54

0:30

3:54

Linton Avenue

1:56

0:30

1:46

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50% 50% 50%

1%

1%

Seaview Avenue‡

1%

Dukes County Way

1%

Lake Avenue

1%

New York Ave

1%

County Road

13:26

Eastville Avenue

8:44

East Chop Drive

2:58

Barnes Road

Added by 2030 1% AEP Flooding

Beach Road (OB)

Vineyard Haven

Existing Conditions

Added by 2030 50% AEP Flooding

Beach Road (VH)‡

Origin

Flooded Segments Affecting Route

Five Corners‡

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‡ Segment included in other resiliency projects

Vulnerable Roadway Segment Prioritization Factors

Road Segment

MassDOT Annual average daily traffic (AADT)

Five Corners‡ Beach Road (VH)‡ Beach Road (OB) Barnes Road East Chop Drive Eastville Avenue County Road New York Ave Lake Avenue Dukes County Ave Seaview Avenue‡

9762 9762 9762 1000 1000 974 1000 9762 9762 1000 N/A

Vulnerable Length (ft) Mean High Water 2030 -

2050 1320 540 280 120 720 600 240

2070 1720 4100 1980 2300 220 60 1540 1320 1860

Residence Time (hrs)

2030 >8" Flood Depth 50% AEP 1720 3100 640 1100 160 1380 920 900

1% AEP 1720 4100 1780 320 2580 920 1120 180 1620 1660 2880

1% AEP >8" Duration 2030 8.9 9.2 8.2 1.0 8.6 4.0 3.6 6.3 2.0 7.7 6.9

2050 ∞ ∞ ∞ 2.4 ∞ 6.5 6.0 8.6 3.6 ∞ 9.1

2070 ∞ ∞ ∞ 4.1 ∞ 8.9 8.2 ∞ 6.2 ∞ ∞

‡ Segment included in other resiliency projects ∞ Segment includes area of potential future high tide flooding

Prioritization

Next Steps: Roadway Adaptation Alternatives Analysis

Prioritized Segments Feasibility Analysis Data Collection • GIS boundaries, Topographic Lidar, and Environmental Resources have been obtained • No planimetric data available - Field Verification needed Feasibility Analysis • Analyze potential elevations, nature-based solutions and relative risk reduction • Analyze side slope configuration and impacts − Natural resource, Private Property

• High level Cost and Permitting Considerations • Propose location-specific Design Flood Elevations (DFEs) and convey resultant risk reduction • Prepare Technical Memo • Present to Selectboard/Public event

Conceptual Design Conceptual Design • Concept Design for Four Priority Segments − Plans, Profiles, and Sections − Adaptability for the future − Cost Estimates

Nature Based Solutions (NBS) • Identify where NBS can be implemented • Produce concept level designs

SAVE THE DATE Next Advisory Mtg ~April 24, 2024 (Earth Day) 10-12pm Feasibility and Alternatives Project Website

https://tinyurl.com/MVHospitalResilience

Engineers | Scientists | Planners

Thank You! Eileen Gunn, Project Manager egunn@fando.com

www.fando.com

Engineers | Scientists | Planners