If all permits are waived and enough money is paid you could mobilize a few Cutter Suction Dredgers (like this on https://www.youtube.com/watch?v=qBCfX-XRM1A ht

If all permits are waived and enough money is paid you could mobilize a few Cutter Suction Dredgers (like this on https://www.youtube.com/watch?v=qBCfX-XRM1A https://www.youtube.com/watch?v=qBCfX-XRM1A) in say two weeks. Working from two sides you can probably dig the bypass in a month. It would be much easier to just widen/deepen canal to get it unstuck. I'm surprised they haven't tried washing away the sand around the bow using the prop wash from a bit tug boat