Designing climate resilience for Lower Manhattan while preserving one of New York City鈥檚 most admired public waterfronts.
Lower Manhattan sits on the frontline of climate change. Storm surge and rising sea levels increasingly threaten residences, businesses and essential infrastructure along New York City鈥檚 waterfront. Battery Park City, built largely on reclaimed land, is particularly vulnerable. Its low elevations make it one of the first places to flood during major coastal events, placing thousands of residents and workers, as well as critical transport and utility networks, at risk.
Following the devastation of Superstorm Sandy, the Battery Park City Authority (BPCA) set out to protect this stretch of shoreline as part of the wider Lower Manhattan Coastal Resiliency program. But the challenge went beyond flood defence alone. Any solution would need to work within a dense urban setting, safeguard existing assets, and enhance 鈥� rather than compromise 鈥� public parks, playgrounds and the waterfront esplanade that define daily life throughout the community, the integrated business network and educational facilities. The challenge for BPCA was not simply to add flood protection but to do so without losing the very character that makes Battery Park City a beloved public realm.
Reimagining flood protection as civic space
BPCA faced a singular problem: how to deliver a continuous 1.5鈥憁ile flood barrier system through one of New York City鈥檚 most open and active waterfronts without significantly changing how it looks, feels or functions in daily life. The flood barrier solutions needed to pass through parks, playgrounds, plazas, a busy esplanade, and across a major transport roadway, achieve protection heights of up to nearly 10 feet, and adapt to dramatically different conditions, from soft landscapes to hard civic spaces, building edges and several transportation related tunnel interfaces. Below ground, existing utilities, telecommunication networks, pile supported relieving platforms, water intake piping and other structural constraints tightly dictated where new flood barrier wall foundations and seepage barriers could be placed.
Our approach focused on treating flood protection as part of the landscape rather than a separate structure. Passive floodwalls were embedded into grading, seating edges and planters, while deployable elements 鈥� flip鈥憉p gates, roller gates, swing gates and stop logs 鈥� were used where openness and access was essential. Parks and promenades were subtly raised and reshaped, so the topography itself provides protection, including the complete reconstruction of Wagner Park as an elevated landscape. Structural upgrades allow the esplanade to host both civic space and flood infrastructure, while new buildings and park elements conceal critical components, creating a FEMA鈥慳ccreditable system that remains invisible day to day and seamlessly connects to future resiliency projects.
Managing complexity in a live urban environment
Delivering resilience at this scale meant navigating exceptional technical and stakeholder complexity. The projects span active parks, transport corridors, tunnels and utilities, all while remaining as open and accessible to the public as possible.
As the consulting engineer for the North/West Battery Park City Resiliency project and the designer of record for the South Battery Park City Resiliency project, we have and continue to support BPCA from early definition through delivery.
Since North/West is using an alternative delivery approach, we developed the project definition and technical criteria, managed the progressive design build procurement process and provided design reviews through each design development milestone. This approach created a clear framework for innovation while maintaining oversight of cost, schedule, risk and performance.
Early works were critical to success. Full鈥憇cale mock鈥憉ps, pile load testing and advanced utility conflict resolution were undertaken during design to reduce uncertainty before construction. In parallel, we supported extensive community and agency engagement, using visualization and design tools to explain options, address concerns and shape an alignment that balanced flood protection with placemaking.
Through competitive trade contractor bidding, transparency, collaboration and informed decision making we successfully achieved a Guaranteed Maximum Price (GMP) giving BPCA the confidence to move forward.
Long鈥憈erm resilience with lasting public value
Together, the North/West and South Battery Park City Resiliency projects form a critical link in Lower Manhattan鈥檚 coastal defence system. While each of the flood barrier infrastructure segments are designed to operate as standalone lines of protection, they are also connected to one another while also enabling subsequent connection to future resilience projects to the north and east, strengthening flood protection across the wider city.
Beyond risk reduction, the projects deliver lasting social and environmental value. Rebuilt parks and playgrounds, including the new Wagner Park Pavilion with community facilities and upgraded public spaces ensure the waterfront remains open, inclusive and active. Investments in planting, stormwater management and water reuse support environmental performance alongside flood defence.
This is climate adaptation that works at a human scale. By integrating engineering, landscape and community priorities,聽Battery Park City聽demonstrates聽how cities can respond to climate risk without sacrificing the places that make them聽admirable.聽