This is one of three “boiler” tanks down in Cannery bay. There was a fish cannery located in this spot.It’s located where Kennedy lake drains into the ocean. They are very large & heavy pieces of equipment! I can only assume the company wanted to save money?
This site canned fish & requiring large boilers. In a few hundred years these boilers will have been consumed & all the iron will have gone back into the surrounding soils.
Everything eventually breaks down.It’s a matter of time.