I would say the chances of the Cut being open anytime this year are slim to (almost) none. The USBR's forecast (as of about a week ago) is not optimistic. Their most probable scenario has the lake dropping to about 3565 in early spring, with a rebound to about 3575 in late June. You need at least 3583 to make it through the Cut. Under their most optimistic scenario (which was greatly downgraded in January from December), the lake would top out at 3590 in late June, and slowly drop from there. In any case, the chance of hitting 3583 by Memorial Day exceeds the capabilities of imagination given that forecast.
Here's a couple links that will help. First, the January elevation forecast map from USBR:
And here's their whole report:
Bureau of Reclamation - Managing water and power in the West
www.usbr.gov
As for plans to deepen the Cut, none contemplated this year, and it wouldn't be possible anyway until completing an update of past environmental studies that looked at this issue, which would take 3 months minimum just to get through that. Maybe next year?