SSA Marine and Jacksonville Port Authority (Jaxport) are putting $239m toward expanding the US terminal operator's use of the Florida port.

The port's board of directors approved a 25-year deal with SSA Marine to build out its 50-acre container leasehold at Blount Island by 30 acres by 2023 with the option to add another 40 acres as space becomes available.

The new SSA Jacksonville International Gateway Terminal will have deeper berthing spaces to handle heavier loaded boxships.

SSA Marine will contribute up to $129.7 million for the use of the terminal and facility upgrades, including the addition of three new 100-gauge container cranes.

Jaxport will complete $109m in berth rehabilitation and upgrades which will allow the terminal to simultaneously accommodate two post-panamax vessels.

The deal includes two five-year renewal options and includes a number of improvements to the Blount Island terminal.