Aspinall Project Notices

Blue Mesa

Project Notices



August 28, 2018

Releases from the Aspinall Unit were decreased by 75 cfs today, August 28th at 10a.m. MDT. Releases are being decreased to retain storage in Blue Mesa Reservoir while still reaching the baseflow target. The actual April-July runoff volume for Blue Mesa Reservoir was 237,500 AF of inflow, which is 35% of average.

Flows in the lower Gunnison River are currently above the baseflow target of 890 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 890 cfs for August and September.

Currently, diversions into the Gunnison Tunnel are 1050 cfs and flows in the Gunnison River through the Black Canyon are around 600 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 525 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



Please contact the Operations Group via e-mail at for additional information.

Last Updated: 8/28/18