We tear down old buildings all the time. What's the difference tearing down an old radio array? It's not like there is nothing out there to replace them.
Frankly, I smell Blue Smoke. I spent some time working for Ron Bracewell in the early 90s, and went to visit Heliopolis (Site 515) with him once. All of the mechanisms were rusted solid. The dishes themselves were frozen and rusting. And this was back 15 years ago. My suspicion is that it would cost more to restore the facility than it would to build a new one.
And then there's the more practical consideration. The RF noise floor is much, much higher here than it was 40 years ago when Heliopolis was constructed. Nowadays you'd much rather be in Northern California or Nevada, up in the Suprise Valley or some other RF Quiet place.
Got a read on this?
I'll take one. I hope Mrs. Bruck doesn't mind!