daybeers wrote: ↑Sat May 13, 2023 7:57 am
They haven't even started actual construction yet?! What have they been spending all this time on then?
It has been complicated. Track #3 across the swing bridge will be taken out on each side of the water. In its place the southern columns ( 1 on each side of water ) for the north lift bridge will go up. During that time only track 1 will cross the swing bridge. Eventually track 1 will be moved north with the north columns north of relocated track 1.
The preliminary work installed a new CP east of the bridge to enable tracks 1 & 3 to be routed westward over swing bridge on tracks 2 & 4 near end of final work on north lift bridge. Then 1 & 3 will be permanently installed on north lift and put in operation. The wash, rinse, and do same for south tracks 2 & 4.
Just how the movement northward of tracks 1 &3 over new lift bridge ill happen but several ways possible. Tracks 1 & 3 and eventually 2 & 4 will be raised to add more free board clearances to the water. As well that allows the lift bridge to be in use above old swing bridge until south lift bridge complete. So trackwork and CAT will need to be raise on slight grade to the higher altitude of new lift bridges.