Hi River Folks,
The high flow for the year is behind us and while warm weather (which will eventually come) will increase flows we are not anticipating another high flow release this year from the HHWP project. We do expect to have additional spill at
Lake Eleanor and increased flows below Hetch Hetchy when it fills. For the upcoming next few weeks, releases will be rather predictable and mellow. Operations at Holm Powerhouse will vary flows -- cCheck the gage below HPH and the pattern is usually predictable
by looking at the daily trends:
http://waterdata.usgs.gov/ca/nwis/uv/?site_no=11278400&agency_cd=USGS& . The gage below Early Intake was having some issues this past week, but the USGS has resolved it.
Cool weather this weekend is going to slow the melt in the unimpaired watersheds of Middle Fork, South Fork, Clavey and North Fork. Eleanor spill will also recede over the weekend. When the warm weather returns those creeks with watershed
elevations extending above 7500 feet flows will bounce back up as there is still snow up there. Please see the table below for total project releases and add your estimate of additional accretions for your recreating spot on the river.
We do anticipate the runoff to extend through the month of June. It is typical for the snowpack we have (and had) this year for runoff to last into the last week of June and the early part of July. The cool May we have had, is helping to
extend the runoff and mellow out the peak flows in the unimpaired creeks. At this point, flows at the Cherry Creek and Tuolumne River confluence are not anticipated to drop dependably below 2000 cfs until late in June. When we have a better estimate we will
provide it.
|
Hetchy Release |
Holm Draft |
Eleanor |
Total Release
|
|||||||
|
All flows in cfs |
High |
Low |
Kirkwood |
High
|
Low |
Cherry Release |
High
|
Low |
High |
Low |
|
5/20/2016 |
1650 |
1750 |
750 |
700 |
400 |
5 |
300 |
300 |
3,405
|
3,205
|
|
5/21/2016 |
1650 |
1750 |
750 |
650 |
325 |
5 |
300 |
200 |
3,355
|
3,030
|
|
5/22/2016 |
1750 |
1250 |
750 |
650 |
325 |
5 |
200 |
100 |
3,355
|
2,430
|
|
5/23/2016 |
1250 |
1000 |
750 |
750 |
350 |
5 |
200 |
100 |
2,955
|
2,205
|
|
5/24/2016 |
950 |
1050 |
750 |
750 |
350 |
5 |
200 |
100 |
2,655
|
2,255
|
|
5/25/2016 |
950 |
1050 |
750 |
750 |
350 |
5 |
200 |
100 |
2,655
|
2,255
|
|
5/26/2016 |
950 |
1050 |
750 |
750 |
350 |
5 |
300 |
100 |
2,755
|
2,255
|
|
5/27/2016 |
950 |
1050 |
750 |
750 |
350 |
5 |
300 |
100 |
2,755
|
2,255
|
|
5/28/2016 |
950 |
1050 |
750 |
650 |
325 |
5 |
400 |
200 |
2,755
|
2,330
|
|
5/29/2016 |
950 |
1050 |
750 |
650 |
325 |
5 |
500 |
300 |
2,855
|
2,430
|
|
5/30/2016 |
950 |
1050 |
750 |
650 |
325 |
5 |
500 |
300 |
2,855
|
2,430
|
Any significant changes to the schedule will be posted on the bulletin board.