Good afternoon,

 

Below are planned releases from HHWP facilities through April 25.

 

For permitting and access information contact the Groveland Ranger District.

 

We strive to keep the user community updated on projected flows on the Tuolumne River.

 

Unregulated flows are expected to decrease modestly through Saturday in response to cloud cover and cooler air temperatures. Runoff is expected to increase later in the weekend as a warming trend strengthens. Intraday powerhouse cycling is expected to continue. See details below.

 

Stated flow rates are best estimates and are subject to change as conditions and operational constraints evolve.

 

Hetch Hetchy Reservoir

• Flows immediately below Hetch Hetchy are approximately 300 cfs
• Kirkwood Powerhouse spill will be variable:

• Weekdays
• 00:00-11:00
• 300-650 cfs
• 11:00-16:00
• 0-50 cfs
• 16:00-24:00
• 300-650 cfs
• Weekends
• 00:00-10:00
• 300-650 cfs
• 10:00-17:00
• 0 cfs
• 17:00-24:00
• 300-650 cfs

 

Cherry Reservoir

• Total flows immediately below Cherry are approximately 8 cfs

• Holm Powerhouse flows will be variable:
• Weekdays
• 00:00-10:00
• 950 cfs
• 10:00-16:00
• 330 cfs
• 16:00-24:00
• 950 cfs
• Weekends
• 00:00-10:00
• 950 cfs
• 10:00-16:00
• 75-100 cfs
• 16:00-24:00
• 950 cfs

 

Lake Eleanor

• Valve releases below Eleanor are approximately 350-400 cfs
• Spill will vary in a range between 50-250 cfs
• Spill expected to decrease this weekend and increase next week in response to snowmelt runoff

 

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Meral’s Pool (best estimates, actual timing and flows may differ)

• April 19-20
• 12:00-17:00
• 1,100-1,800 cfs
• All other hours
• 2,200-3,000 cfs
• April 21-25
• 12:00-17:00
• 1,400-1,900 cfs
• All other hours
• 2,200-3,200 cfs