MAPC presentation, October 19, 2020

Metropolitan Area Planning Council · from the Metropolitan Area Planning Council · 20 pages · 1.0 MB
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Winthrop Climate Resilient 
Land Use Project 
(MVP Action Grant) 
Metropolitan Area Planning Council (MAPC) 
Date: October 19th, 2020

Context for Project 
▶ Winthrop Climate Vulnerabilities 
▶ Municipal Vulnerability Preparedness (MVP) Action Grant 
▶ Regional learning/replicability 
▶ Why climate resilient land use and zoning 
Flood Resilience Checklist and Addendum 
Flood Mapper 
Discussion and Next Steps (10 mins) 
Agenda

About the Metropolitan Area 
Planning Council 
101 municipalities 
1,440 square miles 
Nearly 3.2 million 
residents 
1.8 million jobs 
(2010 Census)

• Top Hazards Identified During 
Municipal Vulnerability Preparedness 
(MPV) Plan: 
• Sea level rise 
• Flooding 
• Hurricanes/Wind/Extreme Storms 
• Wave Action/Storm Surge 
• Extreme heat 
• Fire 
• Erosion 
• Increasing precipitation 
• Isolation 
Winthrop’s Climate 
Vulnerability 
Images: Top - Pico Avenue. Bottom - Short Beach on Revere - Winthrop Line Mark Garfinkel, 
Boston Herald. March 3 rd , 2018.

• MVP program of the Office of Energy 
and Environmental Affairs (EEA). 
• Metro Mayors Coalition municipalities, 
with Winthrop as lead applicant. 
• ~$99,000 for project. 
• Contract extended due to COVID - 19 
delays/shut - downs. 
Municipal Vulnerability 
Preparedness (MVP) 
Action Grant 
Winthrop is part of Metro Mayors Coalition, a 
group of 15 municipalities that work together 
on issues of regional importance, including 
climate preparedness.

• Launched October 2019 
• Existing Policy Review and Memo (Winter 2020) 
• Community Engagement (Spring 2020): 
• Winthrop Vision 2030 Open House 
• Developer calls 
• Draft Flood Resilience Checklist and Addendum (Spring - Summer 
2020) 
• Next Steps with Winthrop - Finish mapping tools, refine draft checklist 
and addendum, and finalize 
Project Timeline

Why a Flood Resilience 
Checklist? 
• Benefits: 
• Projects built today will last for decades to come, a significant 
portion of Winthrop is in the current FEMA flood plain and 
that will only increase due to Sea Level Rise and more intense 
storms 
• Provides educational information and awareness to 
developers and property owners, and allows them to make 
informed decisions 
• Targets residential development and retrofits 
• Limitations: 
• Primarily addresses new construction and deep retrofits, not 
existing buildings 
• Does not add new requirements for action/interventions

Screen 1 of 5

Winthrop Flood Resilience Checklist for Residential Properties
Last Updated: [MONTH, DAY, YEAR]

The following checklist should be submitted with permit applications to the Building Inspector for residential new construction, substan-
tial improvements of existing buildings or utilities upgrade. This checklist is meant to serve as a guide for property owners and devel-
opers to help prepare for increased flood risks due to climate change.

Please refer to the Flood Resilience Checklist Addendum for additional information and definitions.
PROJECT INFORMATION

Applicant Name:

Owner:

Property Address:

Map # Lot #

Is this project: I. New Construction O Substantial Improvement of Existing Building

O Other Retrofit + Equipment/Utilities Upgrade

Note: Construction of new structures and substantial improvements to existing structures in a flood zone must comply with all National
Flood Insurance Program (NFIP) and Massachusetts State Building Code regulations.

Please provide a brief description of the proposed work:

Is any portion of your property in a 1% flood zone (FEMA Special Flood Hazard Area)?

O Yes, What Zone:

What is the Base Flood Elevation? ONo DRAFT MATE R IAL

FEMA defines the Base Flood Elevation (BFE) as the computed elevation to which the flood is
anticipated to rise during the base flood. BFE’s listed on FEMA Flood Insurance Rate Maps
(FIRMs)are also referred to as the 1-percent annual chance flood or 100-year flood.

Dirous f --t

COASTAL FLOODING

Is your property in a location expected to be impacted by future Sea Level Rise (SLR)? See
Map X.

O Yes, What Scenario:
What flood depth is expected at the property? O No
ft.

Has your property flooded in the past?

DO Yes ONo O Don’t know

If your answered “YES” fo the previous question, please answer the following questions to the
best of your knowledge.

What were the dates of the flooding?

Flood Event #1 Flood Event #3

Flood Event #2 Flood Event #4

What was the depth of the flooding to your property? (If you can, state the height of the
water above the lowest floor, including the basement floor.)

Flood Event #1 Flood Event #3

Flood Event #2 Flood Event #4

Additional Comments:

RAIN STORMS AND PRECIPITATION

Has your property flooded in the past due to
precipitation?

0 Yes OO No O Don’t know

If your answered “YES” to the previous question, please answer the following questions as best
you can.

What were the dates of the flooding?

RIAL

Flood Event #1 Flood Event #3

Flood Event #2 Flood Event #4

What was the depth of the flooding to your property? (If you can, state the height of the
water above the lowest floor, including the basement floor.)

Flood Event #1 Flood Event #3

Flood Event #2 Flood Event #4

Additional Comments:

POTENTIAL SITE INTERVENTIONS

Are you providing extra freeboard as a protection measure from flood damage?

Freeboard is the elevation a building’s lowest floor above the base flood elevation. The MA
Building Code- Residential Code requires 2 feet of freeboard in V zones and 1 foot of freeboard
in A zones. Additional freeboard provides increased protection from flooding and greatly reduced
flood insurance premiums. Please review the Massachusetts Office of Coastal Zone Management
Freeboard Fact Sheet or visit the CZM freeboard webpage for more information.

0 No

Check all that apply:

O Too expensive D1 Existing zoning/height
restrictions won't allow

Please describe any additiof{y R goFoTis M ATE

0 Yes
Base Flood Elevation:
Proposed Freeboard:

Was future Sea Level Rise considered when determining the freeboard? 0 Yes FJ No

RIAL

Please provide annual flood insurance quotes/estimates for the following:

1 ft. of freeboard: $ (for A zones only)
2ft. of freeboard: $
3ft. of freeboard: $
Aft. of freeboard: $

What building or site measures are you implementing to protect against flooding and
reduce flood damage?

O Elevate Building O Eliminate basement use

O Elevate mechanical and electrical equipment

os Pr Int | Drai Syst
(flood-proof equipment that cannot be elevated) ump Pump/nternal Drainage System

O Install Backflow Valves O Installing flood openings

Other (please describe):

STORMWATER RETENTION AND REUSE

Please provide the percentage of existing impervious cover*: %

List the percentage of proposed impervious cover*: %

*/mpervious cover includes any structure, surface or improvement that reduces and/or prevents
absorption of stormwater into land (buildings, paved driveways, parking areas, and pathways)

What building or site measures are you implementing for reducing stormwater run-off and
protecting against flooding from rainfall?

Oi Rain Garden, Bioswales, or
0 Increase Green Spaces and Planted Areas ' , TR AT TN
Infrastructure

AATERIAL

0 Permeable Pavement or Permeable Pavers | 0) Green Roofs

OD Rainwater Harvesting /Cistern

Other (please describe):

• Why a Flood Resilience Checklist? 
• What Developers and Property Owners Can Do to Increase 
Resilience: 
1. Understand your property’s current and future flood risk 
2. Make structural improvements 
3. Obtain flood insurance to better recover after a flood event 
• How climate Change Impacts Flooding 
• Glossary of Terms 
Checklist Addendum 
Sections

• FEMA Flood Hazard 
• Sea Level Rise 
• Future Storm Surge: Depth 
• Future Storm Surge: Annual Chance 
Flood Mapper

©) Winthrop Resilience Checklist x |

= © 9) https://experience.arcgis.com/experier

Sea Level Rise Future Storm Surge: Depth Future Storm Surge: Annual Chance

@® Winthrop Parcels

y hich Raltiord
> © FEMA National Flood Hazard Layer { St .
Legend

> @ FEMA National Flood Hazard Layer
for Massachusetts

Winthrop
Winthrop Parcels

DRAFT. MATERIAL

Deer Island

Winthrop Resilience

@® Winthrop Parcels see

® Sea Level Rise eee

Winthrop Parcels

Sea Level Rise
LEGEND
MHHW
MHHW + 1 ft Sea Level Rise
MHHW + 2 ft Sea Level Rise
Pi) MHHW + 3 ft Sea Level Rise
Pip MHHW + 4 ftSea Level Rise
ip MHHW +5 frSea Level Rise

iy MHHW + 6 ftSea Level Rise

Home

FEMA Flood Hazard

Winther

Future Storm Surge: Depth Future Storm Surge >

Yirrell
Beach.

DRAFT MATERIAL

Winthrop Resilience Checklist Home FEMA Flood Hazard Sea Level Rise Future Storm Surge: Annual Chance

@® Depth of 1% Flood: 3°4" Sea ose Suffolk Down

Level Rise
Suffolk

Depth of 1% Flood: 3'4" Sea Level Rise

Witt)

Depth of 1% Flood (feet)
Dry
0-05f

OS ft-1 ft

> 1t-158
Be 158-24
Bm 28-258
Bm 254-38
Bm 34-358
Bp 258-48

45-5Stt
4f-45ft
Sft-10 ft

More than 10 ft

Winthrop Resilience Checklist Home FEMA Flood Hazard Sea Level Rise Future Storm Surge: Depth

® Chance of Surge: Current Sea Suffolk Down

Level

@® Chance of Surge: 8" Sea Level
Rise

® Chance of Surge: 3'4" Sea
Level Rise

onstitution
Chance of Surge: Current Sea Level
Annual Chance of Surge Flooding
01%
0.1%-02%
0.2%-05%
05% -1%
1%-2%
Be 2% -5%
Bp 5%- 10%
10% - 20%
20% - 25%
25% - 30%
30% - 50%
50% - 100%

Dry

DRAFT MATERIAE:® :

Deer Island

Chance of Surge: 8" Sea Level Rise

Annual Chance of Surae Floodina

1. What questions do you have about the Checklist, Addendum, and 
mapping tool? 
2. Is there anything missing (gaps) in the checklist? 
3. What information do you still need to make the checklist useful in 
your role as Planning Board? 
4. Who else should we talk to in refining the draft? 
5. Any additional comments/questions/concerns? 
Discussion Questions

• Feedback on checklist and mapper 
• Please send feedback by November 6 th 
• Option to schedule one - on - one call 
• Finalize and present d ocuments 
• November workshop series with Metro Mayors Coalition 
on climate resilient land use and zoning: 
• November 10 th at 9:30am 
• November 23 rd at 12:30pm 
Next Steps

Thank You! 
Sasha Shyduroff Sshyduroff@mapc.org 
Courtney Lewis Clewis@mapc.org