Good afternoon,

 

Below are planned releases from HHWP facilities for August 2025.

 

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.

 

Flows below all HHWP reservoirs remain at minimum releases for the season. Standard scheduled recreational releases below Holm Powerhouse will continue to occur from 07:00 - 11:00 through September 1, excluding allotted “No Water Wednesdays”.
Next No Water Wednesdays scheduled for August 6 and 20.

 

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

 

Hetch Hetchy Reservoir

• Valve release: 110-114 cfs

 

Cherry Reservoir

·        Valve release: 16 cfs

·         

• Holm Powerhouse:
• 00:00-7:00
• 40 cfs
• 7:00-11:00
• 950 cfs
• 11:00-24:00
• 40 cfs
• “No Water Wednesdays”: 0 cfs

 

Lake Eleanor

• Valve release: 21 cfs

 

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

• 10:00-13:00
• Approx. 1,150 – 1,250 cfs
• All other hours
• Approx. 175-225 cfs

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Any significant changes to the schedule will be posted on the bulletin board.