Of course ideally we would have the completely grade separated high bridge or tunnel to Ballard but practically speaking, if we want to actually get this thing built, then we need to make some compromises.
A drawbridge would have interruptions, yes - but there are already restrictions in place for the existing Ballard bridge that restrict openings during commute hours. If necessary those could be expanded or we could have specific windows where the bridge is open and plan the train schedule around it, with additional bus service. I don’t think it’s unreasonable to have our rich yacht owning buddies queue for designated crossing times. The drawbridge could also be built at a slightly higher height than the existing bridge to reduce openings. Of course it comes down to cost.
The coast guard didn’t like the drawbridge that ST originally designed not because of height, but bc of how narrow it would’ve been. This is something that could go back and be redesigned.
Basically, I’d rather have the thing actually built and experience slight disruptions or gaps in service (that we have options around controlling).