From email from Reclamation (Erik Knight):
Releases from the Aspinall Unit will be decreased from 2100 cfs to 1650 cfs by Thursday, August 1st. Releases are being decreased as the baseflow target for the lower Gunnison River will change to 1050 cfs on August 1st.
Flows in the lower Gunnison River are currently above the baseflow target of 1500 cfs. River flows are expected to remain above the new baseflow target with this release reduction.
Pursuant to the Aspinall Unit Operations Record of Decision (ROD), the baseflow target in the lower Gunnison River, as measured at the Whitewater gage, is 1050 cfs for August through December.
Currently, Gunnison Tunnel diversions are 1050 cfs and flows in the Gunnison River through the Black Canyon are around 1050 cfs. After this release change Gunnison Tunnel diversions will still be 1050 cfs and flows in the Gunnison River through the Black Canyon will be around 600 cfs. Current flow information is obtained from provisional data that may undergo revision subsequent to review.