Kyle Lovett, at Reformed Buddhist Blog, did a tag team on big government with Digital Tibetan Buddhist Altar, and I'll let him tell the outcome:
"Today I was able to reach and speak to a National Park Service Ranger that works at the Petroglyph National Park visitor center, and she passed along the following information to me; 'The NPS no longer has any plans to bulldoze or remove the Stupa, for now or the foreseeable future.'
Apparently, the issue was brought to their attention sometime yesterday, and they even wanted to clarify that the Stupa may be visited at any time by any interested person. While this is great news, they weren't able to expand on any permanent plans the NPS has for the land or the Stupa. I am unsure of the reason they had a change of heart to release this information, but all the same, perhaps the thousands of voices out there were indeed heard."
Thank you to everyone who responded to our call for assistance. May the merit of your collective actions in saving this stupa from harm be dedicated to the welfare of all sentient beings.