Hetch Hetchy Water and Power

Reservoir and Powerhouse Planned Releases

Period of April 9 - 20

 

Reservoir Releases*

Reservoir

Elevation (ft)

Storage (TAF)

Planned Releases (cfs)

Special Conditions

Hetch Hetchy

3786.8

323.2

100 – 3000

Increased valve releases at Hetchy due to increased inflows. Valve releases expected to reduce through the week.

Cherry

4634.1

160.8

5

 

Eleanor

4655.9

22.4

5 – 1000

Currently full and spilling ~1000 cfs. Spill should end soon, and valve releases will be lowered as inflows recede.

 

Powerhouse Releases**

Powerhouse

Planned Tuolumne Releases (cfs)

Special Conditions

Kirkwood

500

Spill at KPH

Holm

25-50

 

Moccasin***

0-200

Spill at Moccasin Reservoir

 

 

* Reservoir releases are dependent on storage and weather conditions, and can be changed at any time.

** Powerhouse releases can vary significantly dependent on power load and operational constraints. Planned releases are estimates.

*** Moccasin releases seen at Moccasin Creek between town of Moccasin and Don Pedro Reservoir. These releases do not affect Tuolumne River conditions, but do impact recreation in Moccasin Creek.