4588.30 ft USBR project datum
level 46.7 ft below full pool — unusually low for mid-August
Reading comes straight from U.S. Army Corps of Engineers Access to Water data (USACE series GLEN.Elev.Inst.1Hour.0.Best-NWO) and updates live when you load this page.
Glendo Reservoir through the year
The band is the lake's own normal: where the level has run on each calendar day, 2008–2026. 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.
- 2011 (wettest on record)
- 2024 (driest on record)
- 2025 (last year)
- 2026 (this year)
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 | 4635.00 ft USBR project datum · per US Bureau of Reclamation (Glendo Dam) full-pool reference |
|---|---|
| Conservation capacity | 492,022 acre-feet · per US Bureau of Reclamation (Glendo Dam) capacity reference |
| Gauge | USACE series GLEN.Elev.Inst.1Hour.0.Best-NWO · U.S. Army Corps of Engineers Access to Water data |
| Datum | USBR project datum — 4635.0 = top of active conservation (USBR project page and USACE CDA agree); irrigation reservoir with large seasonal swings - currently ~47 ft down, normal for late summer drawdown cycles. |
| Last verified | August 15, 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 Glendo Reservoir right now?
Glendo Reservoir is at 4588.30 ft (USBR project datum) as of August 15, 2026 — 46.7 ft below full pool — unusually low for mid-August
Is Glendo Reservoir full?
Not quite — at 4588.30 ft, Glendo Reservoir is 46.7 ft below its full pool of 4635.00 ft (USBR project datum).
What is full pool for Glendo Reservoir?
Full pool (the conservation pool) for Glendo Reservoir is 4635.00 ft USBR project datum, per US Bureau of Reclamation (Glendo Dam) full-pool reference. Levels above it use flood storage; levels below it are drawdown.