Power plant shutdown puts end to peak flows on Gunnison River

East Portal spring 2017

The Gunnison River at the East Portal diversion for the Gunnison Tunnel in May of this year when flows were around 10,500 cfs. This year’s spring peak-flow releases to meet various downstream demands ended today. Photo/story by Dave Buchanan

The Western Colorado Area office of the Bureau of Reclamation announced today (Friday, June 16) that the spring peak-flow operations on the Gunnison River have ended. “Due to an issue with the power plant at Crystal Dam, the ramp down was forced to end prematurely,” the announcement said. A BuRec official said the power plan “tripped offline” and as of late Friday the plant still was awaiting an inspection.

Initially the BuRec had planned to continue ramping the peak flows through Monday but the loss of the power plant meant river flows dropped to their previously set post-peak level.

“As of today (June 16) releases are being made through the bypass gates at a rate of 2,150 cfs. This has put flows in the Gunnison River through the Black Canyon around 1,150 cfs,” Friday’s announcement said. The Gunnison Tunnel, which carries water from the Gunnison River to the Uncompahgre Valley, currently is taking about 1,000 cfs.

According to the Bureau, the releases will continue at this rate “for the foreseeable future,” with further adjustments possible depending on runoff into Blue Mesa Reservoir.

As of Thursday, Blue Mesa was at an elevation of 7,501.88 feet, which puts it at 81.6 percent of full pool and 18 feet below full pool (7,520 feet elevation).

Unless something unexpected happens to the current runoff forecast, Bureau officials it is expected the reservoir will fill this summer.

 

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