From email from Reclamation (Erik Knight):
Releases from the Aspinall Unit will be decreased from 1100 cfs to 800 cfs on Thursday, November 2nd. Releases are being decreased in response to a decrease in diversions at the Gunnison Tunnel. Tunnel diversions will be reduced by 300 cfs on November 1st, so there will be a short period of higher flow in the Gunnison River through the Black Canyon before the release change at Crystal Dam.
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 November through December.
Currently, Gunnison Tunnel diversions are 800 cfs and flows in the Gunnison River through the Black Canyon are around 320 cfs. After this release change Gunnison Tunnel diversions will be 500 cfs and flows in the Gunnison River through the Black Canyon will still be near 320 cfs. Gunnison Tunnel diversions are expected to stay near 500 cfs for the first 2 weeks of November for late season irrigation of the winter wheat crop. Current flow information is obtained from provisional data that may undergo revision subsequent to review.