Good morning,

 

A weekend weather event that was warmer and wetter than advertised has produced substantial increases in HHWP reservoir inflows. Please be advised that Tuolumne River flows will be much higher than previously noted, as Hetch Hetchy Reservoir spillway discharge follows run-of-river flow rates and Cherry and Eleanor Reservoir releases increase to prevent excessive reservoir elevation.

 

Flows at the Cherry-Tuolumne confluence are expected to be in the 2,500-3,000 cfs range through mid-week. HHWP will provide additional release projections this week after additional forecast/information are available.

 

Hetch Hetchy

• Total flows below O’Shaughnessy are approximately 1,400 cfs
• Expected to gradually recede throughout the week

 

Cherry Reservoir

• Holm Powerhouse
• Approximately 950 cfs 07:00-11:00 and 18:00-24:00 June 6
• Approximately 950 cfs all day June 7
• Expected to return to normal schedule by end of week
• Valve releases of approximately 150-200 cfs today June 6, expected to decrease mid-week

 

Lake Eleanor

• Valve releases of 100-200 cfs this week, reducing by Thursday or Friday

 

As always, stated flow rates are best estimates and are subject to change as operational conditions and constraints evolve.