Good afternoon,

 

Updates to planned HHWP releases are detailed below.

 

Please be advised that releases from Hetch Hetchy Reservoir will persist in the 1,300-1,700 cfs range today, and 1,000-1,300 through the weekend, which is higher than previously noted for this time period.

 

Hetch Hetchy Reservoir

• Valve releases will ramp down very gradually from the environmental release performed on May 12
• Friday May 13
• Flows are 1,700 cfs as of this morning
• Decreasing to ~1,300 cfs after noon
• Saturday May 12 – Wednesday May 18
• Flows expected to remain in the 1,000 - 1,300 cfs range
• Decreases are possible if required to promote storage increases
• Kirkwood Powerhouse spill will range between 0-500 cfs
• Flows ~550 cfs 5 PM - 10 AM
• Flows 0 cfs 10 AM - 5 PM

 

Lake Eleanor

• Full and spilling approximately 50 cfs
• Spill is expected to increase by 50-100 cfs over the weekend as a warming trend takes hold

 

Cherry Reservoir

• Valve releases at approximately 7 cfs
• Holm Powerhouse will cycle between approximately 50-950 cfs
• Flows ~950 cfs 6 PM - 8 AM
• Flows ~450 cfs 8 AM - 9AM
• Flows ~50-100 cfs 9 AM - 5 PM
• Flows ~450 cfs 5 PM-6 PM

 

 

All stated flows are best estimates and may be subject to change as operational constraints or needs arise.