Reservoir · Oklahoma · United States · USACE CWMS
Heyburn Lake
35.4% full
Capacity
19.48 hm³
Volume stored
7 hm³
Coordinates
35.948°N, 96.299°W
Last updated
2026-07-30
Current fill
35.4%vs 7 days ago
0.0%stable
vs 1 year ago
-14.2%year-over-year
7-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: 2026-07-30.
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 July 30, 2026, Heyburn Lake is filled to 35.4% of its total capacity, holding roughly 7 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 (+0.0 pts), and it is 14.2 points below its level on the same date a year earlier.
Across the readings we hold for Heyburn Lake — 330 data points between July 31, 2021 and July 30, 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
- 35.4%
- Water stored
- 7 hm³
- Total capacity
- 19 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 14.2 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 35.948°N, 96.299°W
- Last updated
- July 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Jul 2026 | 35.4% | 7 |
| 29 Jul 2026 | 35.4% | 7 |
| 28 Jul 2026 | 35.5% | 7 |
| 27 Jul 2026 | 35.6% | 7 |
| 26 Jul 2026 | 35.7% | 7 |
| 25 Jul 2026 | 35.8% | 7 |
| 24 Jul 2026 | 35.8% | 7 |
| 23 Jul 2026 | 35.9% | 7 |
| 22 Jul 2026 | 36.1% | 7 |
| 21 Jul 2026 | 36.3% | 7 |
| 20 Jul 2026 | 36.5% | 7 |
| 19 Jul 2026 | 36.7% | 7 |
Frequently asked questions
What is the current water level of Heyburn Lake?
As of July 30, 2026, Heyburn Lake is at 35.4% of its capacity, holding approximately 7 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Heyburn Lake reservoir full?
No. As of July 30, 2026, Heyburn Lake is low at 35.4% of its capacity, so it is not full.
Is the water level at Heyburn Lake rising or falling?
The level at Heyburn Lake has been broadly stable over the latest week on record (0.0 points).
How much water can Heyburn Lake hold?
Heyburn Lake has a total capacity of 19 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.