The Astrodome is not an icon. Anyone slinging rocks about it being more important than another stadium just lacks any sense of self awareness.
Wish I had some good info, but one thing seems obvious. The building will require maintenance and suck money down the drain, and it's just not that important.
We're not talking about a historical landmark or even one of the great sporting venues in the history of American Sports.
It's not Fenway. It's not Yankees stadium (which was demolished, even with the infinitely richer history than the Astrodome), it's not Wrigley. It's not even the Superdome.
Now that I think about it, it's almost embarrassing to hold on to something like that. Something that means so little in the grand scheme of things. Is the Astrodome the only thing to have pride in when it comes to the sports history of Houston? If so, that's just sad.
Knock it down, and build a statue of Hakeem the Dream to the same scale of the Statue of Liberty.