#ColoradoRiver Basin: Aspinall Unit operations update

From email from Reclamation (Erik Knight):

Releases from Crystal Dam will be decreased from 1300 cfs to 600 cfs on Friday, October 30th. This reduction coincides with the shutdown of the Gunnison Tunnel. River flows may fluctuate by up to 200 cfs during the day of the diversion shutdown, but will return to the current level afterwards. The current content of Blue Mesa Reservoir is 676,000 acre-feet which is 81% full.

Flows in the lower Gunnison River are currently above the baseflow target of 1050 cfs. River flows are expected to stay 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, is 1050 cfs for the remainder of the year.

Currently, diversions into the Gunnison Tunnel are around 700 cfs and flows in the Gunnison River through the Black Canyon are 600 cfs. After this release change Gunnison Tunnel diversions will be down to 0 cfs and flows in the Gunnison River through the Black Canyon should still be around 600 cfs. Current flow information is obtained from provisional data that may undergo revision subsequent to review.

This scheduled release change is subject to changes in river flows and weather conditions. For questions or concerns regarding these operations contact Erik Knight at (970) 248-0629 or e-mail at eknight@usbr.gov

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