From email from Reclamation (Erik Knight):
Flows in the Gunnison River through the Black Canyon will be increasing to 500 cfs tomorrow, Wednesday, June 6th , in response to decreasing flows in the lower Gunnison River. Pursuant to the Aspinall Unit Operations Record of Decision (ROD), the flow target in the lower Gunnison River, as measured at the Whitewater gage, is 900 cfs for June and July. Flows are forecasted to drop below this level by the end of the week without additional releases from the Aspinall Unit. Therefore releases from Crystal Dam will be increased by 100 cfs late afternoon on Wednesday, June 6th.
More Aspinall Unit coverage here.