508.65 ft NGVD29
level Reading is on the low side for mid-August.
Reading comes straight from U.S. Army Corps of Engineers Access to Water data (USACE series Tulloch.Elev.Inst.~1Day.0.Rev-USBR-Combined) and updates live when you load this page.
Tulloch Reservoir through the year
The band is the lake's own normal: where the level has run on each calendar day, 2006–2026. The summer drawdown — and how this year sits in it — shows up without reading a single number.
This year vs the years that matter
This year's trace against last year and the driest and wettest years on record — the drought-context question every lake regular asks.
- 2026 (this year)
- 2025 (last year)
- 2019 (wettest on record)
- 2013 (driest on record)
Full pool, datum, and the gauge
"Full pool" here means the conservation pool — the level the lake is designed to hold for water supply and recreation, not the flood-control space above it. The full explainer covers flood pool and dead pool too.
| Full pool | not published by the operator |
|---|---|
| Gauge | USACE series Tulloch.Elev.Inst.~1Day.0.Rev-USBR-Combined · U.S. Army Corps of Engineers Access to Water data |
| Datum | NGVD29 |
| Last verified | August 20, 2026 |
LakeDates reports lake level, not ramp status. Whether a given ramp or marina is usable at this level varies ramp by ramp — call the marina before you tow.
Quick answers
How full is Tulloch Reservoir right now?
Tulloch Reservoir is at 508.65 ft (NGVD29) as of August 19, 2026 — Reading is on the low side for mid-August.
Is Tulloch Reservoir full?
Tri-Dam Project (Oakdale and South San Joaquin Irrigation Districts) doesn't publish a conservation-pool figure for Tulloch Reservoir, so this page shows the reading against the lake's own seasonal history instead.
What is full pool for Tulloch Reservoir?
Tri-Dam Project (Oakdale and South San Joaquin Irrigation Districts) doesn't publish a single conservation-pool elevation for Tulloch Reservoir. The seasonal chart shows the range the lake actually runs instead.