That was my first thought, too. Except I forgot about the Chinese steel in the new Bay Bridge section. The photo shows the crane going under the old SF-YBI section.
It might surprise you to know that one of our big exports is metallurgical grade coal so that the Chinese can make the steel the export back to us.
That can be blamed entirely on the US contractor, who went cheap to cover the cost of kickbacks to Democrats necessary to win the project.