BRIDGEPORTIntegrated Approach 1rev. 2016_0706

Iranistan AvenueBioswales and other measures along Iranistan Ave. capture stormwater from the street and adjoining blocks and direct to new retention areas in Seaside Park

Raised Field and WetlandCombine lifting of athletic field and integration of stormwater wetland into Seaside Park to improve function of field and provide outlet for stormwater

from neighborhood

Piped ConnectionRemove stormwater from Park Ave. underpass at RR to new retention area

Upland StormwaterCapture and filter runoff with green infrastructure and new retention areaBuilding and Site Adaptation

Prototype floodproofing of historic sites and buildings as well as new development, to

demonstrate site-scale strategies for addressing acute

flooding

Lowland StormwaterSeparate combined sewers

and use blue streets to redirect stormwater from

Seaside Village into expanded rain garden or new retention

basin *likely to require pumping

Raise Iranistan Avenue 3-4’Lift existing roadway to provide dry access to surrounding properties in event of flooding (incl. 25-to 50-year storms), while redirecting neighborhood runoff to Seaside Park

01 Green Edge

Green edges (regrading shorelines, planting wetlands, creating parkland, and constructing offshore breakwaters) are vital to protecting coastal areas as they break waves coming on shore. These edges double as parks, overtopping zones, stormwater retention and filtration areas, and vital habitats.

Total Cost ($M) 3-5 for Study Area Ease of Implementation Ability to Protect Against or Reduce Impact of Surge

Ability to Reduce or Protect Against Flooding

Main Benefit: Storm surge buffer with potential ecological and recreational benefits, integrated into landscape One Obstacle to Implementation: Measures often require large amounts of contiguous space, which can be difficult in a city, as well as permitting of in-water features

02 Raised Egress

Elevating streets, even by a few feet, can connect low-lying neighborhoods to streets and services that are on high ground. They can also layer in new or improvements to existing stormwater drainage, green and blue streets, and utility microgrids.

Total Cost ($M) 10-12 for Project Area Ease of Implementation Ability to Protect Against or Reduce Impact of Surge

Ability to Reduce or Protect Against Flooding

Main Benefit: Provide dry egress and access to neighborhoods in low-lying areas One Obstacle to Implementation: Modification to existing utilities can be costly and disruptive to quality of life during construction

03 Perimeter Edge Protection

Perimeter edge protection, comprising engineered elements such as berms, floodwalls, and flood gates, can provide protection against coastal flooding.

Total Cost ($M) 20-30 for Project Area Ease of Implementation Ability to Protect Against or Reduce Impact of Surge

Ability to Reduce or Protect Against Flooding

Main Benefit: Provides substantial flood risk reduction from storm surge One Obstacle to Implementation: True benefits of the system are not achieved unless the whole perimeter is built, which can be costly, timely, and difficult to permit

04 Green and Blue Streets

Improvements to streetscapes can help retain and slow the flow of water. Green streets include implementing measures such as bioswales and rain gardens, whereas blue streets can help store and convey stormwater runoff before it enters a combined sewer system.

Total Cost ($M) 4-8 for Project Area Ease of Implementation Ability to Protect Against or Reduce Impact of Surge

Ability to Reduce or Protect Against Flooding

Main Benefit: Helps reduces both coastal and pluvial flooding while enhancing current streetscape One Obstacle to Implementation: Green streets are most impactful when paired with blue streets, which may require complete combined sewer separation

05 Utility Microgrids

Utility microgrids are smaller scale utility systems that can provide services, such as electricity, independent of the existing grid. Microgrids can help improve community resilience by providing power during storm events to critical facilities and homes. They also provide a means of integrating renewable energy sources into the existing power grid.

Total Cost ($M) 7-10 Ease of Implementation Ability to Protect Against or Reduce Impact of Surge

Ability to Reduce or Protect Against Flooding

Main Benefit: Ability to add redundancy to power grid and continuity of service for critical facilities during storm event. One Obstacle to Implementation: Substantial upfront cost and need for stakeholder buy-in

06 Building Adaptation and Development

Building adaptation is a site specific strategy to address acute flooding. For homes, this can include caulking, waterproof painting, and sealing basements, as well as gate closures for doors and entryways. For commercial buildings, this can include raising generators or other infrastructure outside of the floodplain.

Total Cost ($M) Varies per building Ease of Implementation Ability to Protect Against or Reduce Impact of Surge

Ability to Reduce or Protect Against Flooding

Main Benefit: Possible to implement incrementally and to customize per home or facility, and for both existing buildings and new construction One Obstacle to Implementation: Retrofit costs can outweigh benefits from an economic perspective

GREEN EDGEPrecedent

New York City, “Big U”

• 10-mile stretch of berms • Incorporates park spaces• $335 million for a portion of its $1.2

billion first phase

GREEN EDGEPrecedent

Tianjin, China

• formerly a 54 acre garbage dump

• green space and wetland habitat

Raised Egress and AccessProject Area

Raised Egress and AccessPrecedents

Miami, Florida

• Raised 1/3 mile an average of 2.5 feet above front door of adjacent businesses

• Estimated $15 million dollars for phase 1 to raise West Avenue

Precedents

Perimeter Surge Protection

Stamford, Connecticut

• $14.5 million dollars in 1969• Prevented an estimated $25

million dollars in damages during Hurricane Sandy

Project Area

Green and Blue Streets

Precedents

Green and Blue Streets

Seattle, Washington

• Street Edge Alternatives Project • Green street reduced stormwater runoff a total

of 99%• Cooperation of property owners to maximize

impact• $850,000 (in 2001) for block-long street

improvement

Precedents

Green and Blue Streets

Seattle, Washington

• High Point Development• Lot-level measures include rain gardens and

pervious pavements• Block-level measures include swales and berms

that also serve as pedestrian crossing points• Community-level measures include stormwater

ponds and parks• System filters stormwater and reduces runoff

Precedents

Utility Microgrids

Worcester, Massachusetts

• Microgrid for University of Massachusetts Medical School

• Powers medical school and surrounding neighborhood

Precedents

Building Adaptation and Development

New Orleans, Louisiana

• Make It Right Foundation• Elevated homes, solar, and wind protection

Precedents

Steelpointe Harbor, Bridgeport

Building Adaptation and Development

• Raising of land out of floodplain• Commercial development with raised walkways

Opportunities

Building Adaptation and Development

• Floodproof or raise residences, businesses, and institutions

• Building- and site-scale interventions

• Support smart development

Group Work

Please mark your home or business.

And a landmark that is important to you.

Please ask questions and allow everyone to speak.

Use the materials to make your thinking visible!

Directions

Group WorkComponents

Component 01

GREEN EDGE

Component 02

RAISED EGRESS

Component 03

PERIMETER PROTECTION

Component 04

GREEN & BLUE STREETS

Component 05

UTILITY MICROGRIDS

Component 06

BUILDING ADAPTATION & DEVELOPMENT

Resilient Bridgeport

July 23, 2016

What is something you would like to learn more about?

Resilient Bridgeport

July 23, 2016

What is something you would like to learn more about?

Resilient Bridgeport

July 23, 2016

What is something you would like to learn more about?

Resilient Bridgeport

July 23, 2016

What is something you would like to learn more about?

01 Green Edge

Green edges (regrading shorelines, planting wetlands, creating parkland, and constructing offshore breakwaters) are vital to protecting coastal areas as they break waves coming on shore. These edges double as parks, overtopping zones, stormwater retention and filtration areas, and vital habitats.

Total Cost ($M) 3-5 for Study Area Ease of Implementation Ability to Protect Against or Reduce Impact of Surge

Ability to Reduce or Protect Against Flooding

Main Benefit: Storm surge buffer with potential ecological and recreational benefits, integrated into landscape One Obstacle to Implementation: Measures often require large amounts of contiguous space, which can be difficult in a city, as well as permitting of in-water features

02 Raised Egress

Elevating streets, even by a few feet, can connect low-lying neighborhoods to streets and services that are on high ground. They can also layer in new or improvements to existing stormwater drainage, green and blue streets, and utility microgrids.

Total Cost ($M) 10-12 for Project Area Ease of Implementation Ability to Protect Against or Reduce Impact of Surge

Ability to Reduce or Protect Against Flooding

Main Benefit: Provide dry egress and access to neighborhoods in low-lying areas One Obstacle to Implementation: Modification to existing utilities can be costly and disruptive to quality of life during construction

03 Perimeter Edge Protection

Perimeter edge protection, comprising engineered elements such as berms, floodwalls, and flood gates, can provide protection against coastal flooding.

Total Cost ($M) 20-30 for Project Area Ease of Implementation Ability to Protect Against or Reduce Impact of Surge

Ability to Reduce or Protect Against Flooding

Main Benefit: Provides substantial flood risk reduction from storm surge One Obstacle to Implementation: True benefits of the system are not achieved unless the whole perimeter is built, which can be costly, timely, and difficult to permit

04 Green and Blue Streets

Improvements to streetscapes can help retain and slow the flow of water. Green streets include implementing measures such as bioswales and rain gardens, whereas blue streets can help store and convey stormwater runoff before it enters a combined sewer system.

Total Cost ($M) 4-8 for Project Area Ease of Implementation Ability to Protect Against or Reduce Impact of Surge

Ability to Reduce or Protect Against Flooding

Main Benefit: Helps reduces both coastal and pluvial flooding while enhancing current streetscape One Obstacle to Implementation: Green streets are most impactful when paired with blue streets, which may require complete combined sewer separation

05 Utility Microgrids

Utility microgrids are smaller scale utility systems that can provide services, such as electricity, independent of the existing grid. Microgrids can help improve community resilience by providing power during storm events to critical facilities and homes. They also provide a means of integrating renewable energy sources into the existing power grid.

Total Cost ($M) 7-10 Ease of Implementation Ability to Protect Against or Reduce Impact of Surge

Ability to Reduce or Protect Against Flooding

Main Benefit: Ability to add redundancy to power grid and continuity of service for critical facilities during storm event. One Obstacle to Implementation: Substantial upfront cost and need for stakeholder buy-in

06 Building Adaptation and Development

Building adaptation is a site specific strategy to address acute flooding. For homes, this can include caulking, waterproof painting, and sealing basements, as well as gate closures for doors and entryways. For commercial buildings, this can include raising generators or other infrastructure outside of the floodplain.

Total Cost ($M) Varies per building Ease of Implementation Ability to Protect Against or Reduce Impact of Surge

Ability to Reduce or Protect Against Flooding

Main Benefit: Possible to implement incrementally and to customize per home or facility, and for both existing buildings and new construction One Obstacle to Implementation: Retrofit costs can outweigh benefits from an economic perspective

JULY 23 FACILITATION NOTES

Once you’ve explained the basic concepts we’ve developed so far, please encourage people to share their experiences, what they know. Use the rest of the time to help bring participants’

stories, concerns, and ideas to life through the models, drawing, recording, and writing.

Help connect between the PROJECT and STRATEGY in terms of scale, time, and process.

On the goals of this project… • The Strategy: develop a flood protection strategy to reduce the flood risk that arises from both the

acute and chronic flooding in the South End and Black Rock Harbor regions of Bridgeport, inclusive of all opportunities that are feasible and beneficial to South End and Black Rock Harbor and its future growth and economic prosperity

• The Project: $7-7.5 million dollars to explore these goals with a specific focus on public housing in South End (Marina Village) – explain how project should represent larger goals of strategy

• The flood protection strategy should provide protection not only for today’s conditions, but future predicted sea levels as well to provide a design that will be protective for years to come.

On design elevations and climate risk… • Evaluating demonstrable benefits of protecting to different design elevations (i.e., 25-, 50-, 100-, year)

flood risk reduction from storm surge and stormwater • Design elevations are largely dependent on FEMA stillwater elevations and waves, with waves varying

based on location along the Long Island Sound and how far inland o Current estimates between 18 and 20 along the shoreline and 15-16 behind Seaside Park

• The rate at which sea levels are expected to rise is still largely unknown; project team evaluating 3 feet by 2050s

On stormwater flooding… • Heavy rains can flood the city with stormwater • While the city has infrastructure to manage stormwater flooding, this system depends on outfalls in the

sound, which can slow or back up when water levels are high • Most of Seaside Village relies on combined sewer systems • During wet weather events, the hydraulic grade is often not sufficient to push against the combined

flows coming down from Trumbull and northern Bridgeport, which results in raw dilute sewage backing up along Iranistan

• Opportunities include layering in new stormwater infrastructure to capture stormwater runoff before it enters the combined system, as well as green infrastructure, to relieve some load on existing system

• Pumps could be employed to help ensure stormwater does not flood in the streets of the South End

Things to not spend too much time talking about… • Overall Schedule and NDRC (complicated and not yet determined refer to David Kooris) • Environmental Review process (team working with HUD to understand how it affects project schedule )

RESILIENCE CRITERIA (Project Goals)

• Make Bridgeport safer

• Support sustainable adaptation and growth

• Enrich daily lives of residents

• Strengthen environment

• Strengthen Bridgeport’s identity

• Build and operate collaboratively