by west point
There will be a requirement for new base earth works to allow for track access to the new bridge. This earth work will be needed on both sides of the new bridge. The land under the fill for the earthwork may be swamp land or other land that is not very stable ? One thought. If the new Hudson tunnel for Gateway is already being bored that earth / rock might be useable for the earth work. Another possibility that I have no knowledge of is this bridge the cause of PATH tracks needing to be moved ? Or is that relocation later into the 4 tracking into Newark Penn station ?