Chief... Lots of work going on in that space. Long story short, the class III section of NSV will be runnable this year. CDOT is currently rebuilding highway 36 from Lyons to Estes, and are doing a lot of work on the 3ish mile section from town up that is along the river where the damage occured. Major issues to deal with including braided out flood channels that changed where the river sits.
In conjunction with the highway permanent repair, there is a a streambed rehabilitation project along this stretch as well. An environmental engineering firm is doing the instream work to repair the riparian zone that the highway embankment work tears up, and they are also doing in stream work to rebuild the channel. I can't say much more about it other than the right folks are on point working with the folks to make sure paddlers interests are well represented in this rebuilding, and I am optimistic that we will see positive results on NSV along hwy 36.
CO RD 80 is a different story. Not as up to speed on that one. The county is working to rebuild the road. Apparently they have to blast rock out to push the road further away from the creek due to the creek blowing out the road. Not sure what that will look like, but will definitely get some updates prior to runoff. Sounds like this in ongoing. Big project.
As for in town Lyons... lots of work there too. There is a stream team of key Lyons folks working on this. Not 100% sure what the outcome will be for this year. Lots of work is focused on near term repairs to prep for runoff. There will be several years of long term rebuilding to come.
My expectation is that the roads to St. Vrain runs will be open, and the runs will be paddleable this season. The runs will be very different than before... some spots for the worse, perhaps some spots for the better.