About Winthrop: background information

Town of Winthrop · from the Town's website · 38 pages · 5.2 MB
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Winthrop, MA 
April 6, 2018 
Background Information

Agenda 
▪ 7:30 – 8:00 | Registration 
▪ 8:00 – 8:30 | Welcome & Overview 
▪ 8:30 – 9:00 | CRB Workshop Why Are We Here? 
▪ 9:00 – 9:30 | Identify Challenges & Goals 
▪ 9:30 – 10:00 | Background Information About Winthrop 
▪ 10:00 – 10:30 | Climate Change (Mass Audubon) 
▪ 10:30 – 11:00 | Characterize Natural Hazards 
▪ 11:00 – 12:30 | Identify Community Vulnerabilities & Strengths 
▪ 12:30 – 1:30 | LUNCH! 
▪ 1:30 – 2:00 | Natural Infrastructure Solutions (The Nature Conservancy) 
▪ 2:00 – 3:30 | Identify & Prioritize Community Actions 
▪ 3:30 – 4:00 | CRB Workshop Recap & Wrap Up

Background Information 
▪ Population: 17,497 (as of 2010 
Census) 
▪ Located on a peninsula 
▪ 1.6 square miles | 7 mile shoreline 
▪ Connected to Revere by a narrow 
piece of land and to East Boston by a 
bridge over the Belle Isle Marsh 
▪ Densely populated 
▪ One of the oldest communities in the 
United States (settled in 1630)

Winthrop Age Distribution 
▪ Median Age in 2010: 43.7

Population Projections 
▪ Population projected to get older 
▪ Slight increase in age 25 – 34

Environmental Justice Population – English Isolation

Background Information 
▪ Winthrop is the only 
landside connection to 
the Massachusetts 
Water Resource 
Authority Deer Island 
Wastewater Treatment 
Plant 
▪ The plant removes 
human, household, 
business and 
industrial pollutants 
from wastewater that 
originates in homes 
and businesses in 43 
greater Boston 
communities.

Transportation, Water, Sewer & Solid Waste 
▪ Winthrop is served by State Route 
145 which connects community to 
Revere. 
▪ Served by bus service. 
▪ Water is supplied by the MWRA. 
• The Town maintains an extensive 
distribution system. 
▪ Sewer is Town owned and 
maintained – connects to MWRA 
interceptor and is treated at Deer 
Island. 
▪ Curbside solid waste recycling 
contract managed by DPW.

Environmental Features 
▪ Located in Mystic River 
Watershed. 
▪ Only body of surface water in 
town is Lewis Lake. 
▪ Home to a portion of Belle Isle 
Marsh – the last remaining salt 
marsh in the metro Boston area. 
▪ Major wetland areas in Town are 
all coastal/tidal.

Environmental/Natural Features & Parks 
▪ Winthrop Beach 
▪ Yirrell Beach 
▪ Donovan’s Beach 
▪ Pico Playground & Beach 
▪ Fisherman’s Bend 
▪ Belle Isle Marsh 
▪ Lewis Lake/Winthrop Golf Club 
▪ Coughlin Park 
▪ Ingleside Park

Severe Weather 
▪ 16 coastal flood events between 
2006 – 2014 resulting in over 
$3M in property damage 
• 3 coastal flood events during the 
first quarter of 2018! 
▪ 40 heavy snowfall events 
between 1996 – 2014 
▪ 10 severe winter storms recorded 
between 1978 – 2013 – seven of 
which occurred after the year 
2000

Winthrop Hazard Mitigation Plan 
▪ FEMA Approved 
▪ Identifies the following natural hazards that impact 
Winthrop: flooding, wind, hurricane, nor’easter, 
wildfire, tornado, landslide, earthquake

“Winthrop Hazard Mitigation Plan

Highlighted Potential Hazard Mitigation Actions

* Complete the Yurrell Beach seawall extension.

* Upgrade the storm drain system in the area between Winthrop Shore Dnve and Lewis Lake.

+ Add coastal storm surge and flooding protection for the Shirley Street neighborhood adjacent
to Winthrop Shore Drive.

+ Complete the drainage assessment at Ingleside Park and upgrade existing drainage

infrastructure.
Provide for more frequent maintenance of Town-owned drainage infrastructure.

Finish mapping all stormwater outfalls and catch basins on GIS.
Incorporate hazard education awareness, mitigation planning and natural hazard incentives into

Town planning and community development operations.

TOWN OF WINTHROp
HAZARD MITIGATION PLAN
2014 UPDATE

FINAL PLAN APPROVED By FEMA
August 3, 2015

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Resilient Winthrop 
▪ Goal of project to identify and prioritize 
critical public infrastructure and explore 
adaptation measures to improve 
infrastructure and natural resource 
resilience in a number of future 
conditions. 
▪ Within mapped coastal flooding areas 
are critical public infrastructure 
assets/facilities that support daily life in 
Winthrop 
• Sewer Pump Stations, Evacuation 
Routes, Substation, Pressure Reducing 
Valve Stations, Winthrop High School, 
Fire Station, Town Landing, others…

“Critical Public Infrastructure

A) Beach Fire Station

O Belle Isle Bridge

@ Loring Rd. Boat Ramp

(D) Main Street (evacuation route)

@ Pico Sewer Pump Station

@ Pleasant Court Sewer Pump Station
(G) Pleasant Street (evacuation route)
@ Power Substation (Argyle Street)

@ Pressure Reducing Valve Station (Bayview Ave)
J) Pressure Reducing Valve Station (Revere St)
K) Pressure Reducing Valve Station (Underhill St)
@ Public Landing

@ Revere St. Sewer Pump Station

(Ni) Shirley Street (evacuation route)

© Washington Street (evacuation route)
@ Winthrop High School

Figure 4-1 Town-identified i

Critical Public Infrastructure %

Locations DEER
ISLAND

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Coastal Resiliency at Coughlin Park 
▪ Specific plan to increase resiliency at 
Coughlin Park. 
▪ Report evaluated installations that could 
help slow erosion and identified green 
infrastructure along the western 
shoreline as the best alternative to 
increase coastal resilience of the park.

Other Work in Winthrop 
▪ Winthrop Harbor Plan 
▪ Improvements along Winthrop Shore 
Drive, Winthrop Beach, Tafts Avenue, 
Lewis Lake 
▪ Community Development Plan

Other Work in Winthrop 
▪ Sewer improvements on Putnam Street, Putnam Place and Walden Street. Project 
included water main replacement on Jefferson Street and Fremont Street and upgrades 
to a section of the drainage system at the intersection of Jefferson Street and Putnam 
Street. 
▪ Sewer, water, drain and sidewalk improvements on Walden Street, Lincoln Street, Read 
Street, Walden Place and Jerald Street. Drainage improvements included upgrading 
existing drainage to increase capacity in portions of Walden St., Lincoln St. and 
approximately 550 LF along Brookfield Rd. to the outfall structure at Donovan’s Beach. 
▪ Water main, drain and sewer improvements on Bellevue Avenue, Prescott Street, 
Somerset Avenue, Nahant Avenue and Sewall Avenue. 
▪ Water main improvements with some sewer repairs on Plummer Ave., Woodside Ave, 
Woodside Park, Frances St., Sunnyside Ave, Pico Ave, Corinha Beach Rd. and 
throughout the neighborhoods surrounding the water tower. 
▪ Sewer and water main improvements on Franklin Street and Harvard Street.

Other Work in Winthrop 
▪ Water main on Central Street, South Main Street, Hutchinson Street, Taylor Street 
and Underhill Street. Drainage improvements on Taylor Street and Hadassah 
Way. Pavement and sidewalk improvements on Winthrop Street. 
▪ Lewis Lake Tide Gate – Replace existing failed automated tide gate with new 
automated tide gate. Provided a manually operated tide gate on seaward side to 
provide needed redundancy. 
▪ Miller Field/Lewis Lake Drainage and Site Improvements: Complete renovation of 
Miller Field including site drainage improvements and improvements to swales 
along the Veterans Road and Cross Street at the Winthrop Golf Club. 
▪ Various water and sewer emergency repairs. 
▪ Current projects include infrastructure improvements in the Centre Business 
District and shoreline stabilization at Coughlin Park.

Severe Weather 
▪ Areas of local flooding include: 
• Yirrell Beach 
• Nahant Avenue 
• Belle Isle Marsh 
• Winthrop Beach 
• Point Shirley 
• Lewis Lake 
• Ingleside Park 
• Lower Nahant Avenue 
• Coughlin Park 
• Fisherman’s Bend Marsh 
• Pico Avenue 
• Morton Street

Severe Weather 
▪ Flooding at Jefferson Street/Putnam Street intersection: Previous improvements helped reduce the 
frequency of flooding in this area. Additional infrastructure improvements planned under the Centre 
Business District project are designed to provide additional capacity for larger storm events. 
▪ Ingleside Park/Walden Street: Area floods when intense storm events coincide with rising tides. Previous 
improvements have reportedly helped alleviate the frequency and duration of flooding in this 
area. Additional improvements to the outfall and outfall structure at Donovan’s Beach and the drainage 
system in Ingleside Park have been recommended to further alleviate flooding issues. 
▪ Flooding continues at the Winthrop Golf Course. Grading proposed to improve these conditions under the 
Miller Field/Lewis Lake Drainage and Site Improvements project were not constructed due to funding 
concerns. 
▪ Morton Street, Pico Avenue, Washington Avenue and Shirley Street: Significant flooding has occurred in 
these areas during recent storms. The Town will be evaluating options to improve these conditions. 
▪ Coughlin Park shoreline: Significant erosion continues to occur along this shoreline. The Town is in the 
process of permitting improvements for a shoreline stabilization project. Construction of these 
improvements is anticipated to begin in late 2018 or early 2019.

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FEMA National Flood Hazard Layer Polygons

)) A 1% Annual Chance of Flooding, no BFE

§) AE: 1% Annual Chance of Flooding, with BFE
@ AE: Regulatory Floodway

O§ AH: 1% Annual Chance of 1-3ft Ponding, with
Ml AO: 1% Annual Chance of 1-3ft Sheet Flow Fic
MVE: High Risk Coastal Area

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WHAT ABOUT THE 
FUTURE?

Flood Risk 
▪ According to Boston Harbor Flood 
Risk Model – 480 acres (45%) of 
Winthrop’s 1.6 miles is within a 
coastal flooding area. 
▪ By 2070, 800 acres (60%) will be 
within a coastal flooding area. 
▪ The flood area does not expand 
dramatically, but the depth of flooding 
during a storm event DOES.

Areas of Probable Flooding

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Figure 3-3 Winthrop Areas of Probable Flooding TY

Depth of Flooding (1% Change Water Level)

Annual Maximum Temperature

Annual Maximum Temperature Observed
Suffolk County, MA °F
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if 2056-2060 N E C SC &
70 Max 68.44 Ww Nowheas onatinatace 5S
68 - Median 64.64 4
Min 61.53 “YY
66-4
Changes from
64- 1971-2000 for:
2020 - 3.40°
62-5 2049 F
2040 - 4.64"
60 - - 8 2069 F
- 2060 - 5.69°
58 2089 F
56- 2080 - 6.38"
Year
T T T T T T T 1 2097 F A
1960 1980 2000 2020 2040 2060 #2080 ym

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Annual Minimum Temperature

Annual Minimum Temperature Observed
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S-yt Mean ~ wresitwen
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52-4 Max 5215 Ww —~ —
Median 47.52 “YY
507 Min 4282 4
48 - Changes from
46 1971-2000 for:
4 2020 - 3.62°
44 2049 F
427 2040 - 5.02"
40- 2069 F
38-4 2060 - 6.25
2089 F
36 | T T T T T T T Year 2080 7 6.81"
1960 1980 2000 2020 2040 2060 2080 2097 F A
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Annual Days With Maximum Temperature Above 90

Annual Days With Maximum Temperature Above 100

“Annual Total Precipitation

Annual Total Precipitation

Observed
Suffolk County, MA
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Changes from
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2020 - "
2049 0.94
304 2040 - 1
2069 2.42
257 2060 -
2.78"
Year 2089 /
20 T T T T T T T 1 2080 _
1960 1980 2000 2020 2040 2060 2080 377'
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Agenda 
▪ 7:30 – 8:00 | Registration 
▪ 8:00 – 8:30 | Welcome & Overview 
▪ 8:30 – 9:00 | CRB Workshop Why Are We Here? 
▪ 9:00 – 9:30 | Identify Challenges & Goals 
▪ 9:30 – 10:00 | Background Information About Winthrop 
▪ 10:00 – 10:30 | Climate Change (Mass Audubon) 
▪ 10:30 – 11:00 | Characterize Natural Hazards 
▪ 11:00 – 12:30 | Identify Community Vulnerabilities & Strengths 
▪ 12:30 – 1:30 | LUNCH! 
▪ 1:30 – 2:00 | Natural Infrastructure Solutions (The Nature Conservancy) 
▪ 2:00 – 3:30 | Identify & Prioritize Community Actions 
▪ 3:30 – 4:00 | CRB Workshop Recap & Wrap Up

Winthrop, MA 
April 6, 2018 
Community Resiliency Building Workshop

www.CommunityResilienceBuilding.com

Community Resilience Building Risk Matrix rate

Top Priority Hazards (tornado, floods, wildfire, hurricanes, earthquake, drought, sea level rise, heat wave, etc.)
Priority Time

|H-M-L priority for action over the Short or Long term (and Ongoing)
Short Long
H-M-L Ongoing

V = Vulnerability $= Strength

Features | Location |Ownership| V or S
Infrastructural

Societal

Environmental

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