Northern Light
Superstar
^ I think this has been discussed before and you may have even noted it, but from your understanding is one of the alternatives the group wants a bridge truss for the 4th track on the north side? The trees would still need to go, but the embankment changes wouldn't be needed? Of course a truss here would be more expensive and given the contract has been signed and the work will start in the fall it's too late to design it.
In speaking w/the group, I can confirm that a bridge form for the 4th track is one of the options that has been presented.
But there have also been other options mooted.
One is a secant pile option which would be constructed from track level
The other a matrix type wall that would would allow a sort of buttress system that would work around important trees that they would like to see saved.
They're also reviewing further possibilities.