From email from Reclamation (Erik Knight):
Releases from the Aspinall Unit will be decreased from 1750 cfs to 1400 cfs on Monday, October 2nd. Releases are being decreased in response to a reduction in diversions at the Gunnison Tunnel.
Flows in the lower Gunnison River are currently above the baseflow target of 1050 cfs. River flows are expected to remain above the baseflow target for the foreseeable future.
Pursuant to the Aspinall Unit Operations Record of Decision (ROD), the baseflow target in the lower Gunnison River, as measured at the Whitewater gage, will be 1050 cfs for October through December.
Currently, Gunnison Tunnel diversions are 1050 cfs and flows in the Gunnison River through the Black Canyon are around 700 cfs. After this release change Gunnison Tunnel diversions will be 700 cfs and flows in the Gunnison River through the Black Canyon will still be near 700 cfs. Current flow information is obtained from provisional data that may undergo revision subsequent to review.