Reservoir · Oklahoma · United States · USACE CWMS
Heyburn Lake
38.5% full
Capacity
20.68 hm³
Volume stored
8 hm³
Coordinates
35.948°N, 96.299°W
Last updated
2026-06-11
Current fill
38.5%vs 7 days ago
-3.0%losing
vs 1 year ago
+2.6%year-over-year
7-day trend
↓falling
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Design capacity is unavailable for this site, so fill % is estimated against the 5-year maximum storage and may overstate fullness. Last reading: 2026-06-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 35.948, -96.299 · Open in Google Maps
About Heyburn Lake
As of June 11, 2026, Heyburn Lake is filled to 38.5% of its total capacity, holding roughly 8 hm³ of water out of a maximum 21 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has fallen by 3.0 percentage points, and it is 2.6 points above its level on the same date a year earlier.
Across the readings we hold for Heyburn Lake — 329 data points between June 13, 2021 and June 11, 2026 — the level has ranged from a low of 28.7% (September 28, 2021) to a high of 100.0% (June 28, 2021). On average the reservoir is fullest around June and at its lowest around September.
It is operated by USACE primarily for multiple purposes. It lies within the Oklahoma basin at 35.948°N, 96.299°W.
Key facts
- Current fill level
- 38.5%
- Water stored
- 8 hm³
- Total capacity
- 21 hm³
- 7-day change
- ▼ 3.0 pts
- Year-on-year
- ▲ 2.6 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 35.948°N, 96.299°W
- Last updated
- June 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Jun 2026 | 38.5% | 8 |
| 10 Jun 2026 | 41.5% | 9 |
| 9 Jun 2026 | 46.7% | 10 |
| 8 Jun 2026 | 58.1% | 12 |
| 7 Jun 2026 | 76.4% | 16 |
| 6 Jun 2026 | 75.7% | 16 |
| 5 Jun 2026 | 33.6% | 7 |
| 4 Jun 2026 | 33.6% | 7 |
| 3 Jun 2026 | 33.7% | 7 |
| 2 Jun 2026 | 33.8% | 7 |
| 1 Jun 2026 | 33.9% | 7 |
| 31 May 2026 | 34.0% | 7 |
Frequently asked questions
What is the current water level of Heyburn Lake?
As of June 11, 2026, Heyburn Lake is at 38.5% of its capacity, holding approximately 8 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Heyburn Lake reservoir full?
No. As of June 11, 2026, Heyburn Lake is low at 38.5% of its capacity, so it is not full.
Is the water level at Heyburn Lake rising or falling?
The level at Heyburn Lake is falling — it dropped 3.0 percentage points over the latest week on record.
How much water can Heyburn Lake hold?
Heyburn Lake has a total capacity of 21 hm³.
Where is Heyburn Lake reservoir located?
Heyburn Lake is located in Oklahoma, United States, within the Oklahoma basin (coordinates 35.948°N, 96.299°W).
What is Heyburn Lake used for?
Heyburn Lake is used primarily for multiple purposes, and is managed by USACE.