2987.94 ft project datum
level 5.1 ft below full pool — on the high side for early October
Reading comes straight from U.S. Army Corps of Engineers Access to Water data (USACE lake gauge) and updates live when you load this page.
Is Tiber Reservoir full?
Not quite — 5.1 ft below full pool as of October 1, 2026
How full is Tiber Reservoir? Not as a percentage: no storage figure comes through with this gauge reading, and a share of capacity worked out from the elevation alone would be a guess — how much water a reservoir holds at a given level is a curve only the operator's own capacity table knows. Feet from full pool is what the operator publishes, and it is the figure above.
Tiber Reservoir through the year
The band is the lake's own normal: where the level has run on each calendar day, 1990–2026. 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)
- 2011 (wettest on record)
- 1991 (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 | 2993.00 ft project datum · per Bureau of Reclamation (Tiber Dam) full-pool reference |
|---|---|
| Conservation capacity | 925,648 acre-feet · per Bureau of Reclamation (Tiber Dam) capacity reference |
| Gauge | USACE lake gauge · U.S. Army Corps of Engineers Access to Water data |
| Datum | project datum — The district publishes the gauge and the top of conservation pool figure in the project's own datum, so the two compare like for like. |
| 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
What is the lake level for Tiber Reservoir today?
Tiber Reservoir is at 2987.94 ft (project datum) as of October 1, 2026 — 5.1 ft below full pool — on the high side for early October.
Is Tiber Reservoir full?
Not quite — at 2987.94 ft on October 1, 2026, Tiber Reservoir is 5.1 ft below its full pool of 2993.00 ft (project datum).
How full is Tiber Reservoir?
Not as a percentage: no storage figure comes through with this gauge reading, and a share of capacity worked out from the elevation alone would be a guess — how much water a reservoir holds at a given level is a curve only the operator's own capacity table knows. Feet from full pool is what the operator publishes, and it is the figure above.
What is full pool for Tiber Reservoir?
Full pool (the conservation pool) for Tiber Reservoir is 2993.00 ft project datum, per Bureau of Reclamation (Tiber Dam) full-pool reference. Levels above it use flood storage; levels below it are drawdown.