Just two weeks after welcoming the largest container ship to ever arrive on U.S. shores, Ports America, which runs operations at dozens of ports in the U.S., said it would terminate a 50-year lease with the port of Oakland and cease cargo operations within 30 days.

In a statement, Ports America said its joint venture in Oakland’s Outer Harbor Terminal would be returning the leased property back to the port. The company will instead focus on investing in terminal operations in other cities, according to the statement: “Ports America is active in planning its expansion and investment opportunities in its existing locations at both the Port of Tacoma and the ports of Los Angeles and Long Beach.”

Oakland port officials said they were disappointed with the announcement, but added in a statement that cargo would be diverted to its four other container terminals to “blunt the shutdown’s impact.” The port said it aims to maintain its usual monthly volumes.

Oakland port officials also said they’d consider other uses for the soon-to-be-vacant terminal apart from container operations—a new prospect for port, which has operated exclusively container operations for 50 years.

While surprising, the Ports America decision comes as the shipping industry is experiencing some growing pains and freight rates remain stubbornly low. To make the business work, major ocean carriers are consolidating—forming alliances and sharing space on larger ships in some cases, merging operations in others. But as ships have grown in size, fewer ports now have the necessary equipment or infrastructure to handle them.