Because it doesn't function as a bridge anymore. It stopped functioning as a bridge back in 1993. It's a monument now, an industrial monument and part of the ci

Because it doesn't function as a bridge anymore. It stopped functioning as a bridge back in 1993. It's a monument now, an industrial monument and part of the city's heritage. It's already permanently in the open state and more than high enough to let almost any ship through easily. Except for Mr. Bezos' new superyacht. That's why it would have to be dismantled.