I'm going to play the optimism card
Possible vs probable doesn't always mean failure and with such high level involvement I'm going to suspend disbelief.
As for deterioration, there have been many wrecks lifted out of lakes etc so why not look on the bright side of life - de dum, de dum, de dumdee dumdee dum
Even if there has been decay there may well be enough 'bits' to make it worthwhile.
SGC