Roberts tunnel tells you what they are pumping through the tunnel (link above)
North fork at grant is a bit below the tunnel and tells you tunnel plus natural flow (link below)
Difference between tunnel and grant is only a few cfs, meaning very little natural flow. With grant at 173 I would guess bailey has 180 in it. None of the front range creeks has really gotten any natural flow kicking.
I'll get in touch with denver water tomorrow and see what the plans for the tunnel are.
Still way to low for me, but I know its been run before at 180.