Yerkes South – H2H JV to return to Perform Additional Hydrographic Surveys at Ellis Island

Yerkes South – H2H JV team member H2H Geoscience Engineering continues our partnership with Weeks Marine to perform additional Hydrographic Surveys on the historic seawall that surrounds Ellis Island.  The bathymetric and side-scan sonar data taken from the entire perimeter of Ellis Island will aid in the Seawall Stabilization Project, funded by the National Park Service.  

Over the years, part of the island’s aging seawall has been deteriorating, which left unattended, can lead to sinkholes and loss of fill.  The previous hydrographic surveys completed by our team for this project helped develop a design to structurally restore this seawall, prevent further damage, and ensure public safety.  In addition, previous work completed by the team identified potential historic artifacts to be recovered in New York Harbor.

Bathymetric and side scan sonar data of Ellis Island is highlighted in orange.
A close-up view of the bathymetric image identifying and locating seawall blocks underwater by Yerkes South – H2H JV. These blocks have fallen out of the historic seawall.

JV team member H2H will be returning to work at Ellis Island to perform additional bathymetric and side scan surveys for the remainder of the project.  Survey areas will include the recontouring of the area around the temporary berth, the north ferry slip, and access bridge.

Ellis Island is a historical site in New York Harbor that was the country’s largest and most active immigration station, processing over 12 million immigrants from 1892 to 1954.  Located at the mouth of the Hudson River, Ellis Island is now a popular tourist attraction, providing visitors with the opportunity to learn more about this National Landmark, which has been restored and transformed into a museum dedicated to the American Immigration Experience.

For more information about the JV’s comprehensive engineering consulting services, visit


Tilcon, NY 

“We were using a different laser scanning contractor when we became aware of the mobile laser scanning-based methodology that H2H offers, We made the decision to give it a try and have been very impressed with the results."

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