US Army Corps of Engineers
New York District

Sea Gate

Completed Project

The images below show pre-construction and post-construction aerial views of the Sea Gate work area being referenced. The first one is from 1993, which shows before the Coney Island project, and the second one is from 1995, which shows after the initial Coney Island coastal storm risk reduction project construction.


 

Aerial view of Sea Gate before original Coney Island project construction
Aerial view of Sea Gate after initial Coney Island project construction
1993, Pre-Construction: Aerial view of the Sea Gate area from 1993, prior to the initial construction of the Coney Island Coastal Storm Risk Reduction Project that is still in place. This image gives an idea of the pre-project condition of the eroded shoreline at Sea Gate, which the project constructed by the Corps should not worsen. 1995, Post-Construction: Aerial view of the Sea Gate area from 1995, after the initial construction of the Coney Island Coastal Storm Risk Reduction Project that is still in place. This image gives an idea of the work the Corps of Engineers did at Sea Gate during the initial project, including the placement of sand to reduce the risk of flanking at the newly constructed W. 37 Street groin that is also visible separating the public beach from the private side.

 

 

 

Present Day: Aerial view of the Sea Gate area from June 2016 after the Corps completed work on the Sea Gate reach portion of the project.  The sand placement and T-groin construction work the Corps of Engineers completed in Sea Gate will provide the following benefits:
  • Address the erosion west of the W. 37th Street groin
  • Reduce the risk of flanking at the W. 37th Street groin
  • Manage the movement of the sediment being placed so that it does not create issues on the Gravesend Bay side in the future
  • Reduce the need for periodic renourishment (sand placements) west of the 37th St. groin in the future, which helps reduce the long-term costs of the project

As is visible in the images above, there was very little beach at Sea Gate before the initial Coney Island construction. The beach the Corps of Engineers built west of the W. 37th Street groin during the original construction (again, to prevent a flanking condition at the groin and to avoid worsening the previously existing Sea Gate shoreline condition) has eroded over the years and the Corps is going to fix that problem while also reducing the probability of that problem recurring in the future through also constructing the T-groins in the upcoming Sea Gate work. The T-groin approach will help manage sediment movement and reduce erosion west of the groin and thus reduce the need for periodic renourishment (sand placements) west of the 37th Street groin in the future, which helps reduce the long-term costs of the project. The T-groins will also help reduce the build-up of sediment on the Gravesend Bay side of the peninsula as well.

The Sea Gate work, including the construction of new T-groins, has been in development for the past several years and was completed in June 2016. The Sea Gate Reach project called for the construction of four (4) stand-alone T-groin structures. These structures are free standing, all the stones are interlocked to the core unit’s which are interlocked by the weight of the stones to the corrugated steel used to create the T portion structure on the T-groin themselves. Seagate and Coney Island will benefit from this project by allowing more sand to stay on the beach for longer periods of time. The project also includes one rock spur off the existing West 37th Street groin, additional stone armoring of the existing Norton Point dike, and removal of approximately 1,500 linear feet of beach fill currently accumulated in front of the Gravesend Bay bulkheads. This beach fill was placed along approximately 2,000 linear feet of the Atlantic Ocean shoreline within the new T-groin field.

If you have any further questions regarding the Corps of Engineers upcoming activities in Sea Gate or regarding the Corps of Engineers and Coney Island, please feel free to contact the public affairs office at 917-790-8007 or you can e-mail questions to CENAN-PA@usace.army.mil.

For more information regarding the near-term restoration work at Coney Island to repair and restore the previously constructed project after Hurricane Sandy, please visit our near-term restoration page here

Click here to go back to the main Rockaway Inlet to Norton Point (Coney Island) project page.