Good afternoon,

Below are planned releases from HHWP facilities the week of June 13^th.

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 vary significantly over the coming weeks as snowmelt runoff progresses.

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

Hetch Hetchy Reservoir

Total flows below O’Shaughnessy were reduced to approximately 6,300 cfs this afternoon, June 13^th

Additional reductions may be possible pending inflows and weather conditions; notifications to be provided as needed

Kirkwood Powerhouse

Spill of approximately 400 cfs from 19:00-08:00
Little to no spill expected 08:00-19:00

Cherry Reservoir

Total flows below Cherry have been reduced to approximately 1,450 cfs

Additional valve decrease to approx. 1,000 cfs on Wednesday, June 14^th

Holm Powerhouse

Approximately 100-200 cfs 08:00-17:00
Significantly increased flows from 17:00-08:00

Approximately 500-900 cfs 17:00-08:00

Lake Eleanor

Valve releases of 600+ cfs
Spill approximately 500-700 cfs
Total flow below Eleanor approximately 1,200-1,500 cfs

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Last 24 hours of gaged, unregulated Tuolumne River tributaries below HHWP facilities:

Future flows will change significantly with weather and precipitation.

South Fork 350-500 cfs
Middle Fork 550-1,000 cfs

Calculated real time flow station for Meral’s Pool:

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

Last 24 hours calculated at Meral’s Pool: 13,000 – 14,750 cfs*

*NOTE: At current flow rates, USGS Tuolumne R below Early Intake stream gage is suspected to be overreporting by up to approx. 1,000 cfs

This gage is used in the virtual Meral’s Pool calculation

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