Reservoir · Oklahoma · United States · USACE CWMS
Tenkiller Lake
48.7% full
Capacity
1,464.49 hm³
Volume stored
713 hm³
Vs month average
97% of normal
Coordinates
35.597°N, 95.049°W
Last updated
2026-10-28
Current fill
48.7%vs 7 days ago
-0.2 pplosing
vs 1 year ago
N/A7-day trend
→stable
Drought context
Storage vs October average
97%of normal
48.7% full on 2026-10-28, against an average of 50.1% for October across 2 years of readings (-1.4 points).
Drought Monitor at this site · 20 October 2026
D3extreme drought
The ground at Tenkiller Lake's coordinates falls inside the D3 area of the weekly U.S. Drought Monitor map. That describes local conditions — rainfall, soil moisture, streamflow — not the reservoir's storage. Oklahoma drought figures →
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: 2026-10-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 35.597°N, 95.049°W · Open in Google Maps
About Tenkiller Lake
As of October 28, 2026, Tenkiller Lake is filled to 48.7% of its total capacity, holding 713.43 hm³ of water out of a maximum 1,464 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (-0.2 pp).
Across the readings we hold for Tenkiller Lake — 330 data points between October 29, 2021 and October 28, 2026 — the level has ranged from a low of 48.7% (October 27, 2026) to a high of 100.0% (May 7, 2022). On average the reservoir is fullest around May and at its lowest around October.
It is operated by USACE primarily for multiple purposes. It is at 35.597°N, 95.049°W.
Key facts
- Current fill level
- 48.7% of total capacity
- Water stored
- 713.43 hm³
- Total capacity
- 1,464 hm³
- 7-day change
- ▼ 0.2 pp
- Primary use
- Multipurpose
- Operator
- USACE
- Coordinates
- 35.597°N, 95.049°W
- Last updated
- October 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Oct 2026 | 48.7% | 713.43 |
| 27 Oct 2026 | 48.7% | 713.57 |
| 26 Oct 2026 | 48.8% | 713.99 |
| 25 Oct 2026 | 48.8% | 714.56 |
| 24 Oct 2026 | 48.8% | 714.98 |
| 23 Oct 2026 | 48.9% | 715.55 |
| 22 Oct 2026 | 48.9% | 715.97 |
| 21 Oct 2026 | 48.9% | 716.4 |
| 20 Oct 2026 | 49.0% | 717.67 |
| 19 Oct 2026 | 49.1% | 718.38 |
| 18 Oct 2026 | 49.1% | 718.52 |
| 17 Oct 2026 | 49.0% | 717.95 |