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 Topic:  Tuolumne - 2016 Release Predictions 

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Posted to area: CA - Tuolumne - Lower and Cherry CreekLatest PostNext TopicPrev Topic
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chris
Site Admin
Posted: Apr 20, 2016Post Subject: Tuolumne - 2016 Release Predictions
Hetch Hetchy Water and Power reports as follows:

Tuolumne River Folk,

This season we anticipate off and on releases from Hetch Hetchy, spill at Hetch Hetchy, spill at Kirkwood Powerhouse and spill at Eleanor. We will try to keep you updated on all four, with schedules for releases and estimates for spills, with the disclaimer that plans can change with changes in weather and powerhouse operations.

This week we are releasing additional water from Hetch Hetchy and spilling at Kirkwood Powerhouse.


All flows in cfsHetchy ReleaseHetchy SpillKirkwood SpillHolm DraftEleanor and Cherry ReleaseEleanor SpillTotal Releases
Apr 20 to Apr 23 1200 07009501002860
Apr 24 900 07009501002560
Apr 25 300 07009501001960
Apr 26 to May 3 150-200 07009501001810-1860


*Note Hetchy Release, Hetchy Spill and Spill at Kirkwood all affect flows on the Tuolumne River at Early Intake. Holm Draft, Eleanor and Cherry Releases and Eleanor Spill all affect flows on Cherry Creek below Holm Powerhouse. Also note that these are estimates of daily average flows.

We anticipate low releases (150-200 cfs) from Hetch Hetchy from 4/26 through 5/3. Plans for the rest of May are still in flux. We are tentatively planning a high pulse (~6000-7000 cfs) for the second or third week of May, dependent on weather patterns.
chris
Site Admin
Posted: Apr 21, 2016
Hetch Hetchy Water and Power reports as follows:

Time for a change to the plan after consultation with our partners in the National Park Service, we are extending the high releases for the next couple weeks. We expect flows around 1000 cfs from today (April 21) through when we run the high flow pulse (~6000cfs) sometime after May 3. The precise date of the high flow pulse has not been set, and is dependent on ecological concerns, weather, Reservoir levels and inflow timing.

This week we are releasing additional water from Hetch Hetchy and spilling at Kirkwood Powerhouse.


All flows in cfsHetchy
Release
Hetchy
Spill
Kirkwood
Spill
Holm
Draft
Eleanor and
Cherry Release
Eleanor
Spill
Total
Releases

Apr 21 to May 3 1000 07009501002660


*Note Hetchy Release, Hetchy Spill and Spill at Kirkwood all affect flows on the Tuolumne River at Early Intake. Holm Draft, Eleanor and Cherry Releases and Eleanor Spill all affect flows on Cherry Creek below Holm Powerhouse.
*Note the flow at the Tuolumne/Cherry Creek confluence will be Total Releases plus accretion, which can easily be a few hundred additional cfs.
*Note: the above are all estimates of daily average flows.
Edited once.  Last edited by chris Apr 21, 2016.
chris
Site Admin
Posted: Apr 28, 2016
Hetch Hetchy Water and Power reports as follows:

"I wanted to provide a brief update on river conditions.  Yesterday evening our system experienced an alarm condition which caused units to be taken "offline".  This caused a significant reduction in releases below the HHWP project.  We have resolved most of the issues and flows at the confluence of Cherry Creek and the mainstem of the Tuolumne are near 1900 - 2000 cfs as of 0500 this morning.  We anticipate to have all the issues resolved later this morning and for the observed pattern to return.

We will be updating our release plan and forecasted project releases by the end of this week, including the timing of the peak release.  We will provide a more detailed update when we have that information finalized."
chris
Site Admin
Posted: Apr 29, 2016
Hetch Hetchy Water and Power provided an update today, which you can read here.
Studytime
Member
Posted: May 1, 2016Post Subject: Wards Ferry Gauge in the Lake?
It would appear that the gauge at wards ferry is in the lake at this point. Can anybody confirm this?
chris
Site Admin
Posted: May 6, 2016
Hetch Hetchy Water and Power provided an update today, which you can read here.
chris
Site Admin
Posted: May 12, 2016
Hetch Hetchy Water and Power provided an update today, which you can read here.
chris
Site Admin
Posted: May 24, 2016
Hetch Hetchy Water and Power provided an update last Friday, which you can read here.
chris
Site Admin
Posted: May 24, 2016
Hetch Hetchy Water and Power provided an update today, which you can read here.
chris
Site Admin
Posted: Jun 2, 2016
Hetch Hetchy Water and Power provided an update today, which you can read here.
chris
Site Admin
Posted: Jun 10, 2016
Hetch Hetchy Water and Power provided an update today, which you can read here.
chris
Site Admin
Posted: Jun 16, 2016
Hetch Hetchy Water and Power provided an update today, which you can read here.
chris
Site Admin
Posted: Jun 23, 2016
Hetch Hetchy Water and Power provided an update today, which you can read here.
chris
Site Admin
Posted: Jun 23, 2016
Hetch Hetchy Water and Power provided a correction to the previous update today. The link is the same, i.e. you can read the updated version here.
chris
Site Admin
Posted: Jun 30, 2016
Hetch Hetchy Water and Power provided an update today, which you can read here.
Forums -> Archive -> Tuolumne - 2016 Release Predictions Page 1 of 2
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