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Gunnison Gorge Fishing Report: Salmon Fly Hatch of the Black Canyon

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We have a couple of dates still open on salmon fly hatch June 11. gunnisonriverexpeditions.com

Crystal Dam releases will increase twice tomorrow, May 11th.  Starting at 8:00 a.m. releases will increase
about 250 cfs with a second 250 cfs increase planned for 4:00 p.m.  Similar increases will take place each day
until the peak release of about 5000 cfs occurs May 18th.  Ramp-down will begin on the 19th and flows
should stabilize in the 700 – 800 cfs range around May 26th.

Reclamation has set the 2010 spring operation plan for
the Aspinall Unit.

The May 1st Blue Mesa Reservoir April through July runoff
volume forecast from the Colorado Basin River Forecast Center is 560,000 ac-ft.
This results in a Black Canyon Water Right 24 hour peak flow target of 3,883
cfs. Reclamation plans to operate the Aspinall Unit to allow this target to be
met on about May 18th.  To accomplish
this, releases from Crystal Reservoir will begin to increase starting tomorrow,
May 12th and ramp up at about 500 cfs per day, using two changes per day until
a maximum release of around 5,000 cfs (depending on side-inflow fluctuations)
is achieved on the 18th.  This will
require a spill in the neighborhood of 800 cfs at Crystal Dam.  The spill will take place starting on Monday
the 17th ending on Wednesday the 19th. 
Flow decreases should begin on May 19th. 
Again, two changes per day totaling 400 cfs per day and stabilize in the
Black Canyon and Gunnison Gorge on about May 26th in the 700 – 800 cfs
range.