Aspinall Unit operations update: Bumping down in Black Canyon #GunnisonRiver #ColoradoRiver #COriver #aridification

Black Canyon National Park July 2020. Photo credit: Claire Codling/The Department of Interior

From email from Reclamation (Andrew Limbach):

July 14, 2026

Aspinall Unit Operations Update – Release scheduled change to 1,390 cfs on Wednesday, July 15th. 

On Wednesday, July 15th, the adjusted scheduled releases from Crystal Dam will decrease to 1,390 cfs from 1,465 cfs.

Gunnison River flows in the Black Canyon/Gunnison Gorge will decrease to 360 cfs.

On Thursday, July 16th, the adjusted scheduled releases from Crystal Dam will decrease to 1,315 cfs from 1,390 cfs.

Gunnison River flows in the Black Canyon/Gunnison Gorge will decrease to 290 cfs.

Reclamation will continue to monitor flows in the Gunnison River, and on Friday, July 17th, the scheduled releases from Crystal Dam may decrease to 1,265 cfs from 1,315 cfs. 

Gunnison River flows in the Black Canyon/Gunnison Gorge would decrease to 250 cfs. An additional notification will be sent out confirming any change after Wednesday. 

In response to the extreme drought conditions, the BOR has collaborated with US Fish and Wildlife and the National Park Service to reduce the target flows to 500 cfs at Whitewater and 200 cfs through the Black Canyon of the Gunnison until further notice. These releases are made for the authorized purposes of the Aspinall Unit, and to attempt to maintain a target base flow through the endangered fish critical habitat reach of the Gunnison while preserving critical storage in Blue Mesa Reservoir. 

Contact Andrew Limbach (alimbach@usbr.gov or 970-248-0644) for more information regarding Aspinall operations or the Operation Group meeting.

West Drought Monitor map July 7, 2026.

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