Aspinall Unit operations update

Gunnison Tunnel via the National Park Service
Gunnison Tunnel via the National Park Service

From email from Reclamation (Erik Knight):

Releases from Crystal Dam will be increased from 1150 cfs to 1250 cfs on Wednesday, April 29th at 9:00 AM. This release increase is in response to an increase in diversion to the Gunnison Tunnel. The current forecast for April-July unregulated inflow to Blue Mesa Reservoir is 450,000 acre-feet which is 67% 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 April and May.

Currently, diversions into the Gunnison Tunnel are 800 cfs and flows in the Gunnison River through the Black Canyon are around 350 cfs. After this release change Gunnison Tunnel diversions will be around 900 cfs and flows in the Gunnison River through the Black Canyon should be around 350 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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