3585.16 ft project datum
level 0.2 ft above full pool — typical 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 Cold Brook Reservoir full?
Yes, and then some — 0.2 ft above full pool as of October 1, 2026
How full is Cold Brook 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.
Cold Brook 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)
- 2014 (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 | 3585.00 ft project datum · per USACE Omaha District full-pool reference |
|---|---|
| Conservation capacity | 520 acre-feet · per USACE Omaha District 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 Cold Brook Reservoir today?
Cold Brook Reservoir is at 3585.16 ft (project datum) as of October 1, 2026 — 0.2 ft above full pool — typical for early October.
Is Cold Brook Reservoir full?
Yes and then some — at 3585.16 ft on October 1, 2026, Cold Brook Reservoir is 0.2 ft above its full pool of 3585.00 ft (project datum), using flood storage.
How full is Cold Brook 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 Cold Brook Reservoir?
Full pool (the conservation pool) for Cold Brook Reservoir is 3585.00 ft project datum, per USACE Omaha District full-pool reference. Levels above it use flood storage; levels below it are drawdown.