Aspinall Unit Reservoirs

Blue Mesa Reservoir

Current Status

Last Updated: November 7, 2019

Aspinall Unit Reservoirs – As of November 6, 2019 releases from Crystal Dam are approximately 1,450 cfs. Uncompahgre Valley Water Users Association has terminated diversions through the Gunnison Tunnel for the 2019 irrigation season.
Flows in the Black Canyon are about 1,470 cfs. Releases from Crystal are projected to remain at about this level until November 18th and are projected to be reduced to 1,000 cfs for about 2 weeks. In December releases from Crystal will be increased to about 1,500 cfs. 

Blue Mesa did fill this year and achieved a peak elevation on July 25, 2019 of 7519.15 feet above sea level which corresponded to a storage content of 827,000 af (99 percent of full pool). Since this peak filling, Blue Mesa's elevation has declined to 7501.40 feet above sea level on November 6, 2019. 

The unregulated inflow volume in September to Blue Mesa was 28.2 kaf (75 percent of average). Unregulated Inflow volumes forecasted for Blue Mesa for the next three months (November, December and January) are projected to be: 29,000 af (93 percent of average), 27,000 af (103 percent of average) and 26,000 af (108 percent of average), respectively. The November 24-Month Study is reflective of these new forecasts. The water year unregulated inflow forecast volume for 2020 is 0.813 maf which is 85 percent of average.

The Aspinall Unit Working Group is an open public forum for information exchange between Reclamation and the stakeholders of the Aspinall Unit. The public is encouraged to attend and comments on the operations and plans presented by Reclamation at these meetings. Meeting notes from past working Group meetings are posted on the Working Group webpage. For more information on this group and these meetings please contact Erik Knight in the Grand Junction Area Office at (970) 248-0629.

Meeting notes from past working Group meetings are posted on the Working Group webpage at:

The next meeting of the Aspinall Unit Working Group will be held on Thursday, January 23, 2020 at 1:00 pm at the Holiday Inn Express located in Montrose, Colorado.

To view the most current reservoir elevation, content, inflow and release, click on: Blue Mesa Reservoir Data or Crystal Reservoir Data. To view minutes from the last Aspinall meeting, click on: Meeting Notes.


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

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Last Updated: 11/7/19