Hetch Hetchy Water and Power

Reservoir and Powerhouse Planned Releases

Period of March 20 - 30

 

Reservoir Releases*

Reservoir

Elevation (ft)

Storage (TAF)

Planned Releases (cfs)

Special Conditions

Hetch Hetchy

3768.0

288.2

35-6000

Valve releases to accommodate storm inflows possible. Releases may reach as high as 6000 cfs, depending on storm conditions

Cherry

4573.2

76.6

5

 

Eleanor

4636.6

6.3

5 - 3000

Spill may occur due to storm conditions

 

Powerhouse Releases**

Powerhouse

Planned Tuolumne Releases (cfs)

Special Conditions

Kirkwood

0

No spill at KPH

Holm

0-600

Variable generation up to 250 cfs 3/21 and 3/22

0-50 cfs scheduled remainder of time

Moccasin***

0-100

Spill at Moccasin Reservoir 3/20 – 3/22.

 

 

* 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.