Good afternoon,

Below are planned releases from HHWP facilities through April 1. An additional update will be provided next week.

For permitting and access information contact the Groveland Ranger District.

We strive to keep the user community updated on projected flows on the Tuolumne River.

Flows will briefly increase to 6,000 cfs on Wednesday in support of the Upper Tuolumne River Ecosystem Program.
Intraday powerhouse cycling is expected to continue, following similar patterns.

Stated flow rates are best estimates and are subject to change as conditions and operational constraints evolve.

Hetch Hetchy Reservoir

Flows immediately below Hetch Hetchy are approximately 200 cfs

Valve releases will increase dramatically during March 24-26

March 24: valves increasing to 800 cfs
March 25: valves incrementally increasing to 6,000 cfs by the afternoon; then reducing to 3,000 cfs overnight
March 26: valves incrementally reducing from 3,000 cfs to 500 cfs through the day
March 27- April 1: valves releases 200-400 cfs expected, subject to change

Kirkwood Powerhouse

Weekdays

Spill 600 cfs during all hours

Weekends

00:00 – 09:00: spill 600 cfs
09:00 – 17:00: spill 0 cfs
17:00 – 00:00: spill 600 cfs

Cherry Reservoir

Total flows immediately below Cherry are approximately 8 cfs

Holm Powerhouse

45 – 900+ cfs

Lake Eleanor

Valve releases below Eleanor are at approximately 50 cfs

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Meral’s Pool (best estimates, actual flows may differ)

Monday March 23 – Tuesday March 24

1,000 – 3,000 cfs

00:00 – 11:00: 2,500 – 3,000 cfs
11:00 – 19:00: 1,500 cfs
19:00 – 00:00: 2,500 – 3,000 cfs

Wednesday March 25

3,000 – 8,000 + cfs

00:00 – 10:00: 3,000 cfs
10:00 – 18:00: 4,000 – 5,500 cfs
18:00 – 00:00: 8,000 + cfs

Thursday March 26

5,000 – 3,000 cfs

00:00 – 10:00: 5,000 cfs
10:00 – 00:00: 3,000 cfs

Friday March 27

3,000 – 2,500 cfs

Saturday March 28 – Sunday March 29

1,000 – 3,000 cfs

00:00 – 11:00: 2,500 – 3,000 cfs
11:00 – 19:00: 1,000 cfs
19:00 – 00:00: 2,500 – 3,000 cfs