Hetch Hetchy Water and Power
Reservoir and Powerhouse Planned Releases
Period of June 8 - 21
Reservoir Releases*
Reservoir | Elevation (ft) | Storage (TAF) | Planned Releases (cfs) | Special Conditions |
Hetch Hetchy | 3805.3 | 358.9 | 500-1500 | Hetchy Valve releases are at 920 cfs. After Hetch Hetchy fills, releases will follow inflows. Spill + Valve releases up to 1500 cfs is possible. Spill is expected to begin Monday, June 8. |
Cherry | 4685.9 | 244.1 | 5 | None |
Eleanor | 4660.8 | 26.8 | 20-200 | Eleanor may fill and begin to spill depending on inflows. Spill may reach up to 200 cfs. |
Powerhouse Releases**
Powerhouse | Planned Tuolumne Releases (cfs) | Special Conditions |
Kirkwood | 500 | Spill at KPH. |
Holm | 25 |
|
Moccasin*** | 100-200 | 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.