Good morning,

 

Below are planned releases from HHWP facilities through June 12.

 

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 1,300 cfs
• Release continuing between 1,000 cfs – 1,300 cfs until June 12
• HHWP will provide notice if changes to this schedule arise
• Kirkwood Powerhouse

• Spill of approximately 600-700 cfs around the clock June 6-7
• Saturday June 8 – Sunday June 9: spill will reduce to 0 cfs from 09:00-17:00, 600-700 cfs otherwise
• HHWP will provide notice if changes to this schedule arise
• Spill of approximately 600-700 cfs around the clock June 10-12

 

Cherry Reservoir

• Total flows immediately below Cherry are approximately 650 cfs
• Releases increasing to 800 cfs on June 6
• HHWP will provide notice if changes to this schedule arise

• Holm Powerhouse

• June 6 – June 7: spill will reduce to 50 cfs from 10:00-18:00, 900-1,000 cfs otherwise
• June 8 – June 9: spill will reduce to ~80 cfs from 09:00-17:00, 900-1,000 cfs otherwise
• June 10 – June 12: spill will reduce to 50 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 increasing from 400 cfs to approximately 600 cfs on June 6
• HHWP will provide notice if changes to this schedule arise
• 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 3,500-4,500 cfs
• June 6 – June 7: Flows expected to decrease to approximately 3,500 cfs ~12:00-20:00; 4,500 cfs otherwise
• June 8 – June 9: Flows expected to decrease to approximately 3,000 cfs ~11:00-19:00; 4,500 cfs otherwise
• June 10 – June 12: Flows expected to decrease to approximately 3,200 cfs ~12:00-20:00; 4,200 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.