Aspinall Unit operations update (June 9, 2022): Bumping releases to 1400 cfs #ColoradoRiver #GunnisonRiver #COriver

Black Canyon July 2020. Photo credit: Cari Bischoff

From email from Reclamation (Erik Knight):

Releases from the Aspinall Unit will be decreased from 1400 cfs to 1350 cfs on Thursday, June 9th. Releases are being decreased to save water in Blue Mesa Reservoir as the baseflow targets on the Gunnison River are being met. The forecasted April-July runoff volume for Blue Mesa Reservoir is 68% of average.

Flows in the lower Gunnison River are currently above the baseflow target of 900 cfs. River flows are expected to stay at levels 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 900 cfs for June, July and August.

Currently, Gunnison Tunnel diversions are 1030 cfs and flows in the Gunnison River through the Black Canyon are around 380 cfs. After this release change Gunnison Tunnel diversions will still be around 1030 cfs and flows in the Gunnison River through the Black Canyon will be near 330 cfs. Current flow information is obtained from provisional data that may undergo revision subsequent to review.

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