Our Process
What Did this Master Plan Set Out to Achieve?
This master plan set out to protect the Financial District and Seaport neighborhoods from the impacts of climate change. In Fall 2019, the New York City Economic Development Corporation (NYCEDC) and Mayor’s Office of Climate and Environmental Justice (MOCEJ) launched a two-year public planning process, bringing together City agencies, local experts, and an interdisciplinary team led by the Dutch engineering firm, Arcadis, to shape the master plan. The master plan’s ultimate success depends on fostering widespread community support, ensuring technical feasibility, and charting a clear pathway to implementation.
The master plan provides a unique opportunity to address the impacts of climate change while both addressing long-standing neighborhood priorities and, at the same time, serving as a precedent for the city and the region.
Grounded in a Shared Vision
Technically Feasible
Key to the master plan’s success is proposing a reliable and technically feasible system that will defend Lower Manhattan from flooding. To do this, the project team studied how water in the East River moves during both coastal storms and normal weather conditions; the success rate of different flood defense tools in this location; and the potential impacts to maritime transportation, such as ferries, and aquatic ecosystems. The project team also studied how the current drainage system works and developed a strategy to manage stormwater behind the proposed flood defense system.
Implementable
In addition to technical feasibility and community engagement, the master plan charts out a path through design, permits and approvals, and construction. While this includes many considerations—from funding to governance to constructability—state and federal permitting requirements will have the greatest impact on the final design. As implementing the master plan will require state and federal permits, it is critical that the City carefully balance these requirements with the master plan goals and City policy priorities.
Sustainable
In line with OneNYC2050 and the City’s goal of carbon neutrality by 2050, the master plan aims to guide the Financial District and Seaport’s adaptation to the impacts of climate change without compromising the needs of future generations.
Building a Shared Vision: Engagement Timeline
Over two years, the City conducted extensive community outreach to ensure the master plan reflects a shared vision. The work was broken into four phases, described below. The project team organized meetings around key decision points and milestones to ensure transparency and meaningful engagement around master plan priorities and decision-making.
What is the Climate Coalition for Lower Manhattan?
- Alfred E. Smith Houses Resident Association, Inc.
- Alliance for Downtown New York
- C40 Cities Climate Leadership Group
- Financial District Neighborhood Association
- Ford Foundation
- Manhattan Community Board 1
- Manhattan Community Board 3
- New York League of Conservation Voters
- Pace University
- Partnership for New York City
- Pasanella and Son Vintners
- Real Estate Board of New York
- Rebuild by Design
- Resilient Cities Catalyst
- Rockefeller Foundation
- South Street Seaport Coalition, Inc.
- South Street Seaport Museum
- Trinity Church Wall Street
- Trust for Governors Island
- Trust for Public Land
- Urban Assembly New York Harbor School
- Waterfront Alliance
- Assembly Member Niou
- Borough President Levine
- Council Member Marte
- Congressman Nadler
- Senator Gillibrand
- Senator Schumer
- State Senator Kavanagh
Building a Shared Vision: Engagement Timeline


Local elementary schoolers learn about flood risks in Lower manhattan at Public Open House #1 The project team virtually presents the master plan to attendees at Public Open House #4. Fall 2019 - Winter 2020
Assess existing conditions, and being key system analyses Phase II
Spring 2020 - Winter 2021
Identify constrains and opportunities across systems and develop the broadest range of potential resilience solutions Phase III
Winter 2021 - Spring 2021
Phase IV
Spring 2021 - Fall 2021
Narrow the resilience solution based technical feasibility and community and regularity feedback Develop the conceptual design and implementation roadmap