Here it comes....

[2knots]

No water is being released at porcupine and last year the south fork (no dams or other controls on it other then a diversion when they turn on the ag water) is what was running so well that Hyrum was rising all season

Well, I don't know all the ins-and-outs of the water thing, but can tell you that Hyrum seems to holding steady as to fill (per the data)  and there is more water being released that a week ago.  So, maybe it is where it'll stay for the winter leaving room for expected run off and/or meeting needs of downstream users?  Don't know except that I typically fish it several times a winter with no on and off issues, but didn't fish it last year because of the poor edges.

I'm not sure about 'south fork' you mention as to my knowledge the Little Bear is what enters and exits Hyrum, and that is at times dry in summer few miles upstream of dam.

The south fork (of the little bear) comes in along the dirt road that goes over to Liberty, as you head up the road about 2-3 miles (past the turn to porcupine) it crosses the road coming in from the east. The little Bear and the south fork join on the south side of Avon.

OK, understood, been along there.  I guess I always called it just Little Bear, although I do see the map does state South Fork Little Bear above where Davenport comes in.  For sure  the south fork is big player in what water gets to Hyrum, but still not clear how/why they decide to keep in Hyrum rise or let out as apparently doing now.  Surely, there almost always be enough water to fill Hyrum in spring, so how much do you fill in wintwer? Must be many factors such as expected runoff, the targets/responsibility to further downstream, need to leave room in Hyrum so it can buffer spring run off, etc.

This past spring it definitely filled up from the south fork run off as porcupine didn’t start releasing until after it was full. The road across the dam has been closed again so something is being worked on down there but don’t know what