New York Harbor Storm-Surge Barrier
The New York Harbor Storm-Surge Barrier is a proposed system to protect the New York–New Jersey harbor area from large storm surges. The plan envisions two main barriers: one across the mouth of Lower New York Bay (potentially between Sandy Hook, New Jersey, and Rockaway, New York) and a second on the upper East River to form a protective ring around most of the bi-state region. If the southern barrier is placed instead between Coney Island and Staten Island, additional barriers would be needed at Jamaica Bay and the Arthur Kill. The design would use floodgates and keep most cross-sections open during normal conditions to reduce environmental and port-operations impacts.
To address rising seas, the barrier plan is paired with coastline upgrades (like higher seawalls) in a two-tier approach. The system could also be extended eastward to protect communities along Long Island’s south shore. The idea emerged after Hurricane Sandy from the Metropolitan NY-NJ-LI Storm Surge Working Group, chaired by Malcolm Bowman, a professor of oceanography. The proposal would protect critical infrastructure and services, including ports, airports, transit tunnels, hospitals, and the homes of millions of residents in New York City and nearby coastal areas.
Why this is needed: hurricanes and nor’easters pose flood risks, and warming oceans make such storms stronger. Sea levels are rising, which could increase flood risk even without bigger storms. Experts warn that past flood levels could become more common in the future if warming continues.
Background and debate: After Sandy, discussions about regional flood barriers picked up. Some supporters argued a large, regional barrier could be cost-effective, while others suggested smaller, local measures (like levees, raised entrances, and floodproofing buildings) could be faster and cheaper. A Dutch risk expert, Dr. Jeroen Aerts, found that a regional barrier could have a favorable benefit–cost ratio by 2040, but New York City’s plan (SIRR) favored local protections and did not commit to a regional barrier at that time. The Storm Surge Working Group argued that a two-tiered approach combining local protections with offshore barriers would best protect the region and give 100–150 years to move and adapt if needed.
Current study and options: Since 2017, the U.S. Army Corps of Engineers has been evaluating coastal storm risk management and related projects in the New York–New Jersey harbor area. In December 2020, Congress asked the Corps to speed up the study, and the Biden administration restarted it. A draft feasibility report and environmental review have been released, along with supporting materials. The Corps has highlighted Alternative 3B as the Tentative Selected Plan, which largely follows the SIRR shoreline-barrier ideas and adds a floodwall for parts of northern New Jersey. Because funding has been limited, the Corps has shifted to focusing on three smaller, near-term projects while the broader plan is reevaluated.
In short, the New York Harbor Storm-Surge Barrier is a major, two-part proposal to protect the region from future floods by combining offshore barriers with coastal protections, supported by ongoing studies and public discussion about the best, most affordable way to safeguard infrastructure and communities against rising seas and stronger storms.
This page was last edited on 3 February 2026, at 01:33 (CET).