Aspinall Unit operations update: 750 CFS in Black Canyon #runoff

From email from Reclamation (Erik Knight):

Releases from the Aspinall Unit will be decreased to 1650 cfs on Tuesday, June 30th. Releases are being adjusted to maintain flows near the baseflow target in the lower Gunnison River. The June 15th runoff forecast for Blue Mesa Reservoir predicts 59% of average for April-July inflows.

Flows in the lower Gunnison River are currently above the baseflow target of 1050 cfs. River flows are expected to stay at levels above the baseflow target after the release decrease has arrived at the Whitewater gage.

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 1050 cfs for June through August.

Currently, Gunnison Tunnel diversions are 1050 cfs and flows in the Gunnison River through the Black Canyon are around 750 cfs. After this release change Gunnison Tunnel diversions will still be around 1050 cfs and flows in the Gunnison River through the Black Canyon will be around 650 cfs. Current flow information is obtained from provisional data that may undergo revision subsequent to review.

Looking downstream from Chasm View, Painted Wall on right. Photo credit: NPS\Lisa Lynch

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