BACK COVE POND - City of Portland, Maine

BACK COVE POND mbla + CANAL 5 STUDIO

Back Cove Pond

1. Oakdale/ Back Cove Neighborhoods 2. Bayside Neighborhood 3. Arboretum 4. Oakdale Recrea onal Fields 5. Oakdale/ Back Cove Boat House with Boat Launch 6. Great Lawn 7. East Deering Boat House, Dock and Swimming Facili es 8. Bayside Recrea onal Fields 9. Bayside Plaza and Field 10. Longfellow Island and Trails 11. Back Cove Pond and Casco Bay Underpass 12. Beach and Dog Park

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Concept Summary

Project Title

Back Cove Pond

Team ID

mbla + Canal 5 Studio

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Oakdale/ Back Cove Neighborhoods

Bayside Neighborhood

East Deering Neighborhood

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Neighborhood Plans and Amenities

Project Title

Back Cove Pond

Team ID



In the coming decades, rising sea levels will pose a serious threat to the integrity and vitality of the Bayside neighborhood. To protect Bayside, it will be necessary to either raise a substan al por on of the neighborhood or to separate Back Cove from the dal eﬀects of the Atlan c Ocean. Our concept proposes severing the cove from the ocean by means of a dam, which would stabilize water levels and allow Bayside to con nue to grow. The Back Cove becomes Back Cove Pond, hydrologically an isolated stormwater management resource that is no longer subject to dal fluctua on. Back Cove Pond will oﬀer new opportuni es for waterfront development and recrea on, as well as enhanced transporta on connec ons and a rich new ecological regime. New development on the shores of the pond, in combinaon with the planned transforma on of I-295 from highway to boulevard, will create vibrant, mixed-use neighborhood growth centers. With ample new recrea on space along the water, Bayside will become a neighborhood of waterfront parkland, fully connected to exis ng parks, including nearby Payson and Deering Oaks. An integrated network of new pedestrian and cycling routes will connect the neighborhood to the rest of the City. Finally, the pond will serve vital ecological func ons, collec ng and naturally trea ng stormwater from the surrounding urban watershed, providing habitat, and suppor ng a diversity of species within the City. Our climate change scenario assumes up to 10’ of sea level rise over 80 to 100 years.

2050 Proposed Fill Sea Level Rise Impact 2007 1900 1869 1857 1837 1777

An Evolving Boundary: Portland’s Expansion 1777-2007 and 2050 Proposed Shore Line

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Narrative

Project Title

Back Cove Pond

Team ID



40’ 14’ 4’

Back Cove Pond

East Deering Park and Recrea on Fields

295 Bridge and Dam

Beach and Dog Park

Casco Bay

SecƟon Through Back Cove Pond and Casco Bay

40’ 15’ 4’

Back Cove Pond

East Deering Park and Recrea on Fields

295 Bridge and Dam

SecƟon Enlargement Through Back Cove Pond and Casco Bay Board 1

Section

Project Title

Back Cove Pond

Team ID



BACK TO MILL: UNEARTHING PORTLAND’S EMERALD NECKLACE ACETO LANDSCAPE ARCHITECTS

BACK TO MILL: UNEARTHING PORTLAND’S EMERALD NECKLACE Back to Mill is a study of the city as a super-organism in the context defined by intertwined factors influencing the built environment. These factors include climate change (sea level rise) population growth, transportation, consumption and emissions, and socio-economic considerations. Back to Mills concept focuses on returning the sea (Back Cove) to the currently buried Mill Cove, allowing natural systems to help mitigate storm surge while providing an impetus for sustainable redevelopment in the Bayside District.

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PEDESTRIAN OVERPASS (GATEWAY ELEMENT) BOARDWALK CONNECTION/TRAIL BAYSIDE PARK BACK COVE MARINA EAST BAYSIDE COMMUNITY GARDENS/URBAN FARM PUBLIC PARKING BAYSIDE TRAIL CONNECTION TO EASTERN PROMENADE MISS PORTLAND DINER COMMUNITY GATHERING NODE RESTORED WETLANDS AND FLOODWAY COBBLE-PAVED LIVING STREET (HISTORIC RAIL ALIGNMENT) ADAPTED/RESTORED BUILDING(S) KENNEDY PARK (STORMWATER COLLECTION) SAND BEACH PORTLAND STREET STATION PLAZA

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BACK TO MILL BACK TO MILL ACETO LANDSCAPE ARCHITECTS

OLD PORT LANDSCAPE ARCHITECTURE + URBAN DESIGN + GRAPHICS ACETO LANDSCAPE ARCHITECTS | WWW.ACETOLA.COM

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THE SURGE: Rapidly rising sea level combined with strengthened storm surge and a glut of impervious paved surfaces and other manmade interventions lead to widespread flooding and property damage across the Bayside district.

THE RETREAT: Perpetually inundated infrastructure and property damage force the Bayside community to come to terms with rising sea level. The first step to a sustainable Bayside is unshackling natural systems. Here, the historic Mill Cove is unearthed from Interstate 295, and roads are re-aligned to accommodate the flooding.

RECONNECT: A sea wall and berming is introduced along the newly re-aligned Bayside Parkway. The local street grid is reconstituted to historic alignments and reconfigured with pervious paving bio-detention swales and gardens to help mitigate localized flood risk. Mill cove expands, reconnected with the Deering Oaks waterway.

PROTECT: The fully integrated sea wall allows for full redevelopment of the Bayside district, creating a network of walkable streets, tightknit neighborhoods. Dense, mixed-use blocks encourage walking and transit, contributing drastically to overall reduction in global carbon emissions.

1 meter rise * 3 meter rise ** 5 meter rise *

IT’S ALIVE!: YOUR CITY IS A SUPER-ORGANISM

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IT’S ALIVE! BACK TO MILL ACETO LANDSCAPE ARCHITECTS

* impact mapping data derived from document titles Impact of Sea Level Rise on Portland, ME, Natural Resources Council of Maine,map by Greg Lashoto ** 3 meter area interpolated from above referenced map

LANDSCAPE ARCHITECTURE + URBAN DESIGN + GRAPHICS ACETO LANDSCAPE ARCHITECTS | WWW.ACETOLA.COM

1851

BACK COVE

MILL POND In 1851, Portland’s shoreline reached approx what is today known as Kennebec Street. Today, we can still see the historic railroad alignment defined on each side by brick-clad industrial-era buildings. Mill Pond was a natural estuary of Back Cove, forming a neck to the north and connecting the cove with then newly designed and constructed Deering Oaks Park. Deering Oaks Park was designed by Landscape Architect Frederick Law Olmsted, designer of Central Park in New York City. Olmsted’s original vision saw a pond that filled with the tide. In essence, Olmsted’s park was a very early example of green infrastructure, allowing stormwater to filter from the surrounding city streets to the bay through a series of estuarine pools and conveyances.

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MILL COVE PORTLAND FENS

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DEERING OAKS PARK

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PORTLAND STREET TRANSIT STATION PLAZA

MILL COVE NATURAL AREA: In the future, Portland may choose to re-route I-295 and the associated ramps in order to unearth the cove and connect both the waterway and parks system just as has been achieved in Boston with Olmsted’s Emerald Necklace. Opening up Mill cove would allow visitors to circumnavigate the greater portion of the Portland peninsula via parks ans trails. The added open space could help mitigate rising flood waters as well as treat and slow runoff from the city before passing back to the ocean, thereby reducing demand on costly infrastructure while providing a delightful public amenity.

TRANSIT CORRIDOR HISTORIC COASTLINE CIRCA 1850

ELEVATE PARKWAY BLOCKS

ARMOR AND ACTIVATE SEAWALL CONNECT

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BAYSIDE FLOATS: ELEVATE THE BLOCK

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BAYSIDE FLOATS BACK TO MILL ACETO LANDSCAPE ARCHITECTS


2100: THE BIG DIG

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On the cusp of the 22nd century, Bayside has adapted to global climate change. A resilient Bayside continues the New England tradition of walkable urbanism, streets designed for a slower pace, and sensible infrastructure based on natural systems. An emerald necklace of parks, open space, and trails connects the Eastern Promenade to Back Cove, Mill Cove, Deering Oaks, and the Greater Portland. The buried arterial streets open up additional land for transit lines, walking, and bicycle commuting, thereby reducing overall carbon emissions in Portland, improving air quality and encouraging a more resilient, localized economy.

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PEDESTRIAN OVERPASS (GATEWAY ELEMENT) BOARDWALK CONNECTION/TRAIL BAYSIDE PARK BACK COVE MARINA EAST BAYSIDE COMMUNITY GARDENS/URBAN FARM PUBLIC PARKING BAYSIDE TRAIL CONNECTION TO EASTERN PROMENADE MISS PORTLAND DINER COMMUNITY GATHERING NODE RESTORED WETLANDS AND FLOODWAY COBBLE-PAVED LIVING STREET (HISTORIC RAIL ALIGNMENT) ADAPTED/RESTORED BUILDING(S) KENNEDY PARK (STORMWATER COLLECTION) SAND BEACH PORTLAND STREET STATION PLAZA

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UNDERGROUND PARKING UNDERGROUND DETENTION STORMWATER COLLECTION PARK BURIED ARTERIAL TUNNEL ENTRANCE BACK BAY PROMENADE PAVILIONS FENS PRIVATE STORMWATER GARDENS LIVING STREET(S)

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2100: THE BIG DIG BACK TO MILL ACETO LANDSCAPE ARCHITECTS


BAYSIDE RESILIENCY PARK ALYSSA PHANITDASACK

EXPANSION OF PORTLAND PENINSULA SINCE 1777

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SEA LEVEL RISE PREDICTIONS OVER THE NEXT CENTURY GREAT DIAMOND ISLAND

GREAT DIAMOND ISLAND

The shape of Portland’s peninsula has been dramatically altered between the 19th and 20th century, as land was filled for commerce, transportation, and real estate development. LITTLE DIAMOND ISLAND

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PORTLAND INTERNATIONAL JETPORT (PWM)

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These circumstances provide a great opportunity to invest in the development and creation of Bayside Resiliency Park - an integrated flood mitigation urban park. and recreation center.

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With Portland’s desire to grow, the ‘East Bayside’ neighborhood is a highly desirable investment opportunity due to large lot sizes and relative low costs. However, the predicted increase in sea level over the next century will erode the infill and the future landscape will more closely resemble the natural contours as seen in 1777.

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LIGONIA

CITATIONS: https://bdn-data.s3.amazonaws.com/blogs.dir/320/files/2015/07/portland2.jpg http://oshermaps.org/exhibitions/the-changing-peninsula/i-portland-then-and-now

Project Title Team ID

BAYSIDE RESILIENCY PARK ALYSSA PHANITDASACK


PORTLAND, MAINE HALF MILE NEIGHBORHOODPORTLAND, MAINE HALF MILE NEIGHBORHOOD 1/2 MILE

Concept Summary

Many urban planners claim that cities are defined by the quality of their public spaces. While Portland provides many great parks, they are often bare, open fields lacking in design and interactive engagement. The Bayside Resiliency Park would provide heavy flood mitigation as well as a first class urban space for Portland. With small and large plantings, street furniture, water and light features, interactive platforms, and artwork, it would become a destination for visitors and a year long asset for the community.

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ART PARK IN COLLABORATION WITH THE MUSEUM

MULTI-TIERED LANDSCAPE TO MITIGATE E HEAVY RAINS AND FLOODING

BRIDGE CONNECTOR AND PUBLIC SPACE ADDITION

BUILDINGS WITH INTEGRATED WATER FEATURES

RETENTION POND & MULTI SEASON RENTAL STATION

COMMUNITY FARMING

COMMERCIAL AND CIVIC BUILDING OPPORTUNITIES

SEATTLE SCULPTURE PARK SEATTLE, WA

LOWER MANHATTAN PROPOSAL MANHATTAN, NY

THE HIGH LINE NY, NY

JAQUA CENTER EUGENE, OR

ECHO PARK LOS ANGELES, CA

DETROIT

EXPLORATORIUM SAN FRANCISCO, CA

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PLAN & IMPLEMENTATION BACK COVE RESILIENCY PARK ALYSSA PHANITDASACK


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PROPOSAL SECTION BACK COVE RESILIENCY PARK ALYSSA PHANITDASACK


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CITATIONS: https://bdn-data.s3.amazonaws.com/blogs.dir/320/files/2015/07/portland2.jpg http://oshermaps.org/exhibitions/the-changing-peninsula/i-portland-then-and-now google earth - portland, maine


CONCEPT RENDERING BACK COVE RESILIENCY PARK ALYSSA PHANITDASACK


BAYSIDE RISES BILD ARCHITECTURE

BASE ASSUMPTIONS

6' of sea-level rise by 2100 Sea-level rise will reach 20' in the foreseeable future

KEY SCENARIO DESIGN ELEMENTS

Construct a pedestrian-oriented canal along the current alignment of the Bayside trail. Convert I-295 to a multi-modal avenue. Raise Franklin Street, Preble Street and Forest Avenue to the level of the multi-modal avenue.

KEY RESULTS

Canal allows Bayside to drain water effectively during storm events and creates a pedestrian destination. Former I-295 creates levee against rising sea-level and stitches the city to the water. Raised infrastructure in Bayside will be both protected from and prepared for inundation.

PEDESTRIAN-ORIENTED CANAL MULTI-MODAL AVENUE RAISED ROADWAY

FUTURE RAISED DEVELOPMENT

REORGANIZED TRAFFIC INTERSECTION

EXTENDED TIDAL ZONE

PUBLIC GREEN SPACE

Climate Change Scenario Description:

Recreation and Property Value:

Main connector roads - Franklin Street, Preble Street Recreational uses and property values are a focus of and Forest Avenue - will be raised to the elevation of the the thinking in this plan. The canal, as a first phase, will new multimodal road for the lengths that cross Bayside. create a draw for a new pedestrian element in the city, This will allow new commercial buildings to be built with that spurs the construction of buildings along the canal. a submersible lower level and an upper level that has These buildings will be constructed such that the first frontage on the new raised streets. floor can be abandoned in the future. The canal will also serve as a recreational "green belt" increasing Marginal Way will remain at the current elevation, with Beyond the 2100 sea-level rise projections, further pedestrian connectivity between Deering Oaks Park and changes to the road network must address the need to uses being shifted out of the first floors as sea-level rise the Eastern Promenade. demands. hold back water and/or elevate infrastructure. After the canal, the plan includes the decommissioning * Dennis, Brady & Mooney, Chris. “Scientists of the limited access highway. This allows the new The plan proposes for I-295 to be decommissioned as a nearly double sea level rise projections for 2100, multi-modal corridor to be the seam connecting the highway and converted to a multi-model avenue at the because of Antarctica” The Washington Post same elevation. The converted road will be used as a Back Cove recreation area and the new urban March 30, 2016. Website. levee against future sea-level rise and will allow the new development that will happen along the inland road urban road to be the future commercial waterfront of frontage. As sea-level rises, Back Cove has the potential Portland. As sea-level rises beyond the design scenario to be the hub of recreational water use and small-scale the City will have the option to allow water to rise in Back commercial fishing for the city. Cove or to construct flood gates at the location of Tukey's Bridge, making Back Cove a protected harbor. Projections for sea-level rise vary from 1' by 2100 to 6' by 2100. This plan calls for a canal to be installed by 2060 to prepare for 6' of rise by 2100 *. The canal would be used to drain the neighborhood from frequent flooding and would be effective for the 6' projection for sea-level rise.

The final element of plan calls for raising Franklin Street, Preble Street and Forest Avenue to be at the level of the new multi-modal corridor. This provides the opportunity for more buildings to be constructed with high and dry, urban, pedestrian-access frontage.

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CONCEPT SUMMARY BAYSIDE RISES BILD ARCHITECTURE

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MARGINAL WAY PREBLE STREET ET RE T S M L E

EXISTING COASTLINE

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FRANKLIN

EXISTING INFRASTRUCTURE

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PROPOSED INFRASTRUCTURE EXISTING ROAD NETWORK PROPOSED RAISED ROADWAY

SECTION B SECTION C A

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SECTION AT THE CANAL

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CONCEPT PLAN & SECTIONS BAYSIDE RISES BILD ARCHITECTURE

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CONCEPT RENDERINGS & DIAGRAMS BAYSIDE RISES BILD ARCHITECTURE

CATCH AND RELEASE! SOREN DENIORD, SOREN DENIORD DESIGN STUDIO RICHARD LO, KAPLAN THOMPSON ARCHITECTS DANIELLE FOISY, KAPLAN THOMPSON ARCHITECTS