Hetch Hetchy Water and Power reports as follows:
We have been performing some system reconfiguration and adjusting valves. Flows are high below HH, however there is no additional accretion below KPH. However, the USGS gage above Intake shows ~1000 cfs accretion
from HH to Intake (not possible given the dry, hot weather). We are at the upper end of rating tables and lots of material is moving in the creeks, use the absolute flow values at your own discretion. Hetchy is nearing spill elevation at a gentle rate, hence
a range showed in the table for flows below HH.
The sum of the gages below HPH and Intake equals ~13,900 –I believe this value is high given our known operational conditions. Flows below the dams seems accurate based on elevations and valve conditions. Below
is our estimate. If you use the sum of the gage below HPH and Intake, your range is +1000 cfs.
On Monday, we will reduce Cherry and HPH releases to accommodate work at Cherry. The change will happen in the morning – both changes should be completed by 0900 and remain for the daytime. The same condition
will occur for Tuesday.
Enjoy the raging creeks. Adam
|
*All flow estimates are estimates. Timing of valve moves is subject to change! |
Expected Releases, |
Expected Releases, |
|
June 24-25 (cfs) |
June 26-27 (cfs) |
|
|
Cherry Lake |
1,050 |
20-1050 |
|
Holm PH |
950 |
100-950 |
|
Lake Eleanor Valves |
700 |
700 |
|
Lake Eleanor Spill |
400 |
100 |
|
Hetch Hetchy |
9,000-10,000 |
9,000-10,000 |
|
Kirkwood PH |
0 |
0 |
|
Total HHWP releases |
12,100-13,100 |
9,920-12,900 |
Any significant changes to the schedule will be posted on the bulletin board.