2003.55 ft NGVD29
level 0.5 ft below full pool — on the low side for mid-August
Reading comes straight from U.S. Army Corps of Engineers Access to Water data (USACE series FSUP.Elev.Inst.1Hour.0.Ccp-Rev) and updates live when you load this page.
Fort Supply Lake through the year
The band is the lake's own normal: where the level has run on each calendar day, 2015–2026. 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)
- 2016 (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 | 2004.00 ft NGVD29 · per USACE Tulsa District full-pool reference |
|---|---|
| Conservation capacity | 12,221 acre-feet · per USACE Tulsa District capacity reference |
| Gauge | USACE series FSUP.Elev.Inst.1Hour.0.Ccp-Rev · U.S. Army Corps of Engineers Access to Water data |
| Datum | NGVD29 — 2004 ft is the district's top of conservation pool figure, in the same NGVD29 datum as the gauge. |
| 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 Fort Supply Lake right now?
Fort Supply Lake is at 2003.55 ft (NGVD29) as of August 20, 2026 — 0.5 ft below full pool — on the low side for mid-August
Is Fort Supply Lake full?
Not quite — at 2003.55 ft, Fort Supply Lake is 0.5 ft below its full pool of 2004.00 ft (NGVD29).
What is full pool for Fort Supply Lake?
Full pool (the conservation pool) for Fort Supply Lake is 2004.00 ft NGVD29, per USACE Tulsa District full-pool reference. Levels above it use flood storage; levels below it are drawdown.