Aspinall Unit operations update: Current inflow forecast for Blue Mesa = 105% of avg

Black Canyon via the National Park Service
Black Canyon via the National Park Service

From email from Reclamation (Erik Knight):

Releases from Crystal Dam will be decreased from 3000 cfs to 2000 cfs, over the next 3 days. Releases will be decreased by 400 cfs on Wednesday, July 22nd, by 350 cfs on Thursday, July 23rd, and by 250 cfs on Friday, July 24th. This reduction is in response to the declining inflows to Blue Mesa Reservoir which have allowed the reservoir elevation to drop to 2 feet below the maximum water surface elevation. The current forecast for April-July unregulated inflow to Blue Mesa Reservoir is 710,000 acre-feet which is 105% of average.

Flows in the lower Gunnison River are currently above the baseflow target of 1500 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 1500 cfs for July and 1050 cfs for August.

Currently, diversions into the Gunnison Tunnel are around 1050 cfs and flows in the Gunnison River through the Black Canyon are 2000 cfs. After this release change Gunnison Tunnel diversions will be around 1050 cfs and flows in the Gunnison River through the Black Canyon should be around 1000 cfs. Current flow information is obtained from provisional data that may undergo revision subsequent to review.

More Aspinall Unit coverage here.

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