That's obviously a leading question, since it is clearly not OK for anyone to steal anything.
For the purpose of answering your question therefore, I'll ignore your use of the word "steal" (as I believe that if due legal process is followed it is not stealing) and deal with the point you are aiming at.
Like I said...
That means that if the appraisal says the land is worth $2.5 million and the government has only offered $250,000, then the government will need to increase its offer. If it tried to force through a sale at $250,000 by using Eminent Domain that would be an abuse of power. However, looking at the process described in my earlier post, I would have thought that any judge would have thrown such an attempt out of court, or at least requested further appraisals be completed.
Since eminent domain requires due process of law, the owner should be protected from lowball offers, and the government should be able to purchase property that, given the altruistic nature of this project, is clearly intended for public benefit.