Please see corrections to yesterday’s update below in red.

 

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Good afternoon,

 

Below are planned releases from HHWP facilities through June 5. Another update will be provided on June 5 for the June 6 – June 11 time frame.

 

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 will continue to remain elevated and may vary significantly over the coming weeks as weather changes and spring runoff season progresses.

 

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 2,000 cfs
• Release decreasing to 1,500 cfs  on June 4
• Release decreasing to 1,200 cfs  on June 5
• HHWP will provide notice if changes to this schedule arise
• Kirkwood Powerhouse

• Spill of approximately 600-700 cfs around the clock June 3-4
• Wednesday June 5: spill will reduce to 0 cfs from 10:00-18:00, 600-700 cfs otherwise
• HHWP will provide notice if changes to this schedule arise

 

Cherry Reservoir

• Total flows immediately below Cherry are approximately 500 cfs
• Releases decreasing to 300 cfs on June 4
• HHWP will provide notice if changes to this schedule arise

• Holm Powerhouse

• Spill of approximately 900-1,000 cfs around the clock June 3-4
• Wednesday June 5: spill will reduce to 0 cfs from 10:00-18:00, 900-1,000 cfs otherwise
• HHWP will provide notice if changes to this schedule arise

 

Lake Eleanor

• Run-of-river operation with full storage
• Valve releases of approximately 300 cfs
• Spill is expected to range from 0 to 200 cfs

 

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

• Flows are currently approximately 5,200-5,500 cfs
• Flows will reduce to 4,300 – 5,000 cfs June 4
• Flows expected to decrease to approximately 2,500 cfs ~12:00-20:00 Wednesday June 5; 4,000-4,300 cfs otherwise

 

Calculated real time flow station for Meral’s Pool:

https://cdec.water.ca.gov/dynamicapp/QueryF?s=TMP

https://cdec.water.ca.gov/webgis/?appid=cdecstation&sta=TMP

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