Reservoir · Oklahoma · United States · USACE CWMS
Tenkiller Lake
92.2% full
Capacity
806.82 hm³
Volume stored
744 hm³
Coordinates
35.597°N, 95.049°W
Last updated
2026-09-11
Current fill
92.2%vs 7 days ago
-1.8%losing
vs 1 year ago
N/A7-day trend
↓falling
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. 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. 35.597, -95.049 · Open in Google Maps
About Tenkiller Lake
As of September 11, 2026, Tenkiller Lake is filled to 92.2% of its total capacity, holding roughly 744 hm³ of water out of a maximum 807 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has fallen by 1.8 percentage points.
Across the readings we hold for Tenkiller Lake — 329 data points between September 12, 2021 and September 11, 2026 — the level has ranged from a low of 92.2% (September 10, 2026) to a high of 105.0% (October 30, 2021). On average the reservoir is fullest around April and at its lowest around September.
It is operated by USACE primarily for multiple purposes. It lies within the Oklahoma basin at 35.597°N, 95.049°W.
Key facts
- Current fill level
- 92.2%
- Water stored
- 744 hm³
- Total capacity
- 807 hm³
- 7-day change
- ▼ 1.8 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 35.597°N, 95.049°W
- Last updated
- September 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Sep 2026 | 92.2% | 744 |
| 10 Sep 2026 | 92.2% | 744 |
| 9 Sep 2026 | 92.3% | 745 |
| 8 Sep 2026 | 92.6% | 747 |
| 7 Sep 2026 | 92.8% | 749 |
| 6 Sep 2026 | 93.1% | 751 |
| 5 Sep 2026 | 93.5% | 755 |
| 4 Sep 2026 | 94.0% | 758 |
| 3 Sep 2026 | 94.4% | 762 |
| 2 Sep 2026 | 94.8% | 765 |
| 1 Sep 2026 | 95.2% | 768 |
| 31 Aug 2026 | 95.6% | 771 |