Reservoir · Oklahoma · United States · USACE CWMS
Heyburn Lake
31.0% full
Capacity
19.48 hm³
Volume stored
6 hm³
Coordinates
35.948°N, 96.299°W
Last updated
2026-09-11
Current fill
31.0%vs 7 days ago
-0.6%losing
vs 1 year ago
N/A7-day trend
→stable
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: 2026-09-11.
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 September 11, 2026, Heyburn Lake is filled to 31.0% of its total capacity, holding roughly 6 hm³ of water out of a maximum 19 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-0.6 pts).
Across the readings we hold for Heyburn Lake — 330 data points between September 12, 2021 and September 11, 2026 — the level has ranged from a low of 30.5% (September 28, 2021) to a high of 100.0% (June 25, 2026). 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
- 31.0%
- Water stored
- 6 hm³
- Total capacity
- 19 hm³
- 7-day change
- ▼ 0.6 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 35.948°N, 96.299°W
- Last updated
- September 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Sep 2026 | 31.0% | 6 |
| 10 Sep 2026 | 31.1% | 6 |
| 9 Sep 2026 | 31.0% | 6 |
| 8 Sep 2026 | 31.1% | 6 |
| 7 Sep 2026 | 31.3% | 6 |
| 6 Sep 2026 | 31.4% | 6 |
| 5 Sep 2026 | 31.5% | 6 |
| 4 Sep 2026 | 31.6% | 6 |
| 3 Sep 2026 | 31.7% | 6 |
| 2 Sep 2026 | 31.9% | 6 |
| 1 Sep 2026 | 32.0% | 6 |
| 31 Aug 2026 | 32.1% | 6 |