From email from Reclamation (Ryan Christianson):
Gunnison River flows have dropped off quickly over the last few days and there is a need for more water in the Gunnison River to meet the target of 1050 cfs, pursuant to the Aspinall Unit Operations Record of Decision (ROD). Therefore, releases from the Aspinall Unit will be increased by 150 cfs tomorrow afternoon, June 18th at 2pm.
Currently, diversions into the Gunnison Tunnel are 1040 cfs and flows in the Gunnison River through the Black Canyon are around 475 cfs. After these release changes, flows in the Gunnison River through the Black Canyon will be around 625 cfs. Current flow information is obtained from provisional data that may undergo revision subsequent to review.