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 Topic:  Tuolumne - 2022 Recreational Releases 

Forums -> Flows -> Tuolumne - 2022 Recreational Releases Page 1 of 1
Posted to area: CA - Tuolumne - Lower and Cherry CreekLatest PostNext Topic
 Author  Message 
chris
Site Admin
Posted: Apr 5, 2022Post Subject: Tuolumne - 2022 Recreational Releases
Hetch Hetchy Water and Power reports today as follows:

Quote:
Summary of HHWP planned releases below.

Please note that Holm and Kirkwood generation will be scheduled to cycle dramatically this week in response to marked volatility in power demands and grid congestion.  This cycling will begin tomorrow, April 6, 2022.

Flows at Merals Pool may decrease to below 1,000 cfs during mid-day hours (timing below).

Cherry Reservoir

* Valve releases at approx.  6 cfs
* Holm Powerhouse will cycle daily between approx.  75 cfs and 900 cfs + Decreased flows are expected during daytime hours (~08:00 - 18:00), though timing may vary depending on demand

Lake Eleanor

* Valve releases at approx.  11 cfs
* Full and spilling, spill rates of 100-250 cfs are expected

Hetch Hetchy Reservoir

* Valve releases from O'Shaughnessy at approx.  130 cfs
* Kirkwood Powerhouse spill to the Tuolumne will cycle daily between 0 and approximately 680 cfs + Kirkwood cycling will mimic cycling at Holm Powerhouse, zero spill during 08:00-18:00 period.

chris
Site Admin
Posted: Apr 7, 2022
Hetch Hetchy Water and Power reports today as follows:

Quote:
Due to volatility in power demands/pricing and inflow forecasts, a few changes are noted below.  Additionally, an upcoming Holm Powerhouse outage is outlined in the Cherry Reservoir section.

We are doing our best to keep the community updated as to the projected flows on the Tuolumne, but please be advised that flows and timing may vary dramatically over the next several weeks.

Cherry Reservoir

* Valve releases at approx.  6 cfs
* Holm Powerhouse will cycle between 50-900 cfs
    + Flows will be scheduled to reduce from 500 cfs to approx.  50 cfs at 08:00 for the coming week
    + High flows will resume at 17:00 each day
* Holm Powerhouse is scheduled for a maintenance outage on April 17-18
    + Generation will be cut at 08:00 on April 17, resuming at approx.  18:00 on April 18

Lake Eleanor

* Valve releases at approx.  11 cfs
* Full and spilling, spill rates of 100-250 cfs are expected this weekend, decreasing next week with cooler weather

Hetch Hetchy Reservoir

* Valve releases from O'Shaughnessy at approx.  130 cfs
    + Valve releases will decrease to approx.  65 cfs next week
* Kirkwood Powerhouse spill to the Tuolumne will cycle daily between 0 and approximately 250 cfs
    + Kirkwood spill will decrease to 0 cfs at 07:00 for the coming week
    + High flows will resume at 18:00 each day

chris
Site Admin
Posted: Apr 8, 2022
Hetch Hetchy Water and Power reports today as follows:

Quote:
Due to decreasing inflow forecasts associated with next week's cool weather we have reduced Holm Powerhouse morning generation
Monday April 11 through Friday April 15.  All other releases are unchanged.

We strive to keep the user community updated on projected flows on the Tuolumne River, flows are expected to vary significantly
over the coming weeks.

Cherry Reservoir

* Valve releases at approx.  6 cfs
* Holm Powerhouse will cycle between 50-900 cfs
    + Flows will be scheduled to reduce from 500 cfs to approx.  50 cfs at 08:00 on Saturday April 9 and Sunday April 10
    + Flows will be scheduled to reduce from 140 cfs to approx.  50 cfs at 08:00 Monday April 11 through Friday April 15
    + High flows will resume at 17:00 each day
* Holm Powerhouse is scheduled for a maintenance outage on April 17-18
    + Generation will be cut at 08:00 on April 17, resuming at approx.  18:00 on April 18

chris
Site Admin
Posted: Apr 13, 2022
Hetch Hetchy Water and Power provided an update yesterday (April 12), which you can read here
chris
Site Admin
Posted: Apr 18, 2022
Hetch Hetchy Water and Power provided an update today (April 18), which you can read here
chris
Site Admin
Posted: Apr 20, 2022
Hetch Hetchy Water and Power provided an update today (April 20), which you can read here
chris
Site Admin
Posted: Apr 23, 2022
The 2022 provisional Tuolumne River release schedule is now available.

Deviations from the above schedule, if any, will be posted here.
chris
Site Admin
Posted: Apr 26, 2022
Hetch Hetchy Water and Power provided an update today (April 26), which you can read here
chris
Site Admin
Posted: May 5, 2022
Hetch Hetchy Water and Power provided an update today (May 5), which you can read here
chris
Site Admin
Posted: May 13, 2022
Hetch Hetchy Water and Power provided an update today (May 13), which you can read here
chris
Site Admin
Posted: 3 days ago
Hetch Hetchy Water and Power provided an update today (May 17), which you can read here
chris
Site Admin
Posted: 2 days ago
Hetch Hetchy Water and Power provided an update today (May 17), which you can read here
Forums -> Flows -> Tuolumne - 2022 Recreational Releases Page 1 of 1