From email from Reclamation (Dan Crabtree):
Reclamation will be reducing releases from Crystal Reservoir during the coming weeks in response to the dry fall conditions and to provide low river elevations for the Brown Trout spawn. The target base flow for the Black Canyon will be 400 cfs this winter due to the current dry conditions. On Saturday October 16th at 4:00 p.m., releases from Crystal dam will be reduced by 100 cfs resulting in a flow in the Black Canyon and Gunnison Gorge of about 500 cfs. During the coming weeks, as the Uncompahgre Valley Water Users reduce diversions through the Gunnison Tunnel, there will probably be some minor flow fluctuations in the river. Flows in the Gunnison Gorge and Black Canyon will settle in the 400 cfs range sometime during the last two weeks of October.
More Aspinall Unit coverage here.