Guaranteed..............
Construction all my life and this is different than a cost over-run ballooning project like the Big Dig where contracts had massive extras and change orders and additional phases had to be added. This is an instance where a State Department of Transportation did a preliminary estimate (not a contract or bid from a final design) and now that the designers are getting the design finished and getting it ready to go out to bid they are warning that the spit—in-the-hand estimate of a year back was way off base.