An equally important--maybe more important--pair of questions has not even been asked, much less answered:
How much will the needed repairs cost?
Who will pay the cost of the repairs?
The morally and ethically right way for the extra cost to be paid is for the inept builder to assume all the cost of the needed repairs after depletion of the already nearly bankrupt contract contingency fund. If that cuts into Bechtel's profits or even leads to a loss on the project, it would be right and appropriate.
On the other hand, we're talking contracts which are completely unrelated to "doing the right thing." If so, it probably means the Silver Line's "funding partners"--MWAA, Fairfax, & Loudoun counties PLUS the unrepresented Dulles Toll Road users who are being soaked with half the line's construction cost--will have to take on the burden. That could mean all those political promises (if that's not an oxymoron) hyped last year that tolls would not have to go up again for a couple of years may be thrown out to fill the gap in financing Phase 1.
It also won't help Loudoun and especially Fairfax County finances either. Fairfax County, in particular, is running close to its debt financing cap and the last thing it needs to do is divert the remaining balance from needed schools, transportation, and other projects to help finance Bechtel's failures.
So, what are the answers to these two critical questions?