I thought I heard 700cfs gaurentee through August 15th, then down to natural flows after that. So I would suggest getting there this weekend or next based on that (if my grapevine and buzz rememberence serves me correctly)
I read an article in the Mountain Mail that said they have already shut off the augmented flows. They transfer a constant 300 cfs through the Otero Pump Station to reservoirs on the front range. The article said they stopped the call for the artificial flows about 2 weeks ago. A member of the Arkansas River Conservancy says they will augment flows to 800 cfs at the Wellsville gauge until aprox. August 15th if necessary. As of right now they havn't had to do this, the flows currently are all natural.
The water flow announcements page for the ark is a great resource. It would be great to have that for all of the dam controlled flows and water movements. Beats having to call people up or waiting for posts on the buzz.