Hetch Hetchy Water and Power reports as follows:
Update on flows for June 19 to 26:
1) Current from Hetch Hetchy are 5000 cfs. Today we are increasing releases from Hetch Hetchy to 7000 cfs
a. Due to the very hot weather, snowmelt has accelerated and inflows to Hetch Hetchy are above 10,000 cfs. An increase in releases will delay spill to the desired date.
2) Eleanor continues to spill – inflows remain fairly high, and spill has remained steady at 200 cfs (for a total release of 950 cfs including the valves). Spill will follow inflows while the lake is full – for the next week, I expect that inflows will maintain some spill at Eleanor.
a. The Eleanor gauge appears to be correct.
3) Cherry Valve Releases are at 10 cfs, June 13, to accommodate an inspection of the submerged Cherry Intake Tower on June 21 & 22.
a. Cherry valve releases will remain at 10 cfs until afternoon June 22, when we plan on increasing to 2000 cfs.
b. Cherry valve releases will be reduced to 20 cfs again on June 26-29.
c. Cherry valve releases will be increased to ~1000 cfs on June 30.
4) Holm PH releases temporarily will drop to 200 cfs on June 22, and to 0 cfs on June 27-29.
*All flow estimates are estimates. Timing of valve moves is subject to change!
June 19-20 (cfs)
June 21-22 (cfs)
June 22-26 (cfs)
Lake Eleanor Valves
Lake Eleanor Spill
5,000 – 7,000
Total HHWP releases
9,550 – 11,550
Here is a link to most of our stream gauges:
Any significant changes to the schedule will be posted on the bulletin board.