Reservoir · Oklahoma · United States · USACE CWMS
Tenkiller Lake
104.8% full
Capacity
806.82 hm³
Volume stored
846 hm³
Coordinates
35.597°N, 95.049°W
Last updated
2026-07-30
Current fill
104.8%vs 7 days ago
+0.2%gaining
vs 1 year ago
+0.1%year-over-year
7-day trend
→stable
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: 2026-07-30.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 35.597, -95.049 · Open in Google Maps
About Tenkiller Lake
As of July 30, 2026, Tenkiller Lake is filled to 104.8% of its total capacity, holding roughly 846 hm³ of water out of a maximum 807 hm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has held broadly steady (+0.2 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Tenkiller Lake — 329 data points between July 31, 2021 and July 30, 2026 — the level has ranged from a low of 99.1% (October 1, 2021) to a high of 105.0% (July 31, 2021). On average the reservoir is fullest around July 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
- 104.8%
- Water stored
- 846 hm³
- Total capacity
- 807 hm³
- 7-day change
- ▲ 0.2 pts
- Year-on-year
- ▲ 0.1 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 35.597°N, 95.049°W
- Last updated
- July 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Jul 2026 | 104.8% | 846 |
| 29 Jul 2026 | 104.6% | 844 |
| 28 Jul 2026 | 104.8% | 845 |
| 27 Jul 2026 | 104.9% | 846 |
| 26 Jul 2026 | 105.0% | 848 |
| 25 Jul 2026 | 105.0% | 849 |
| 24 Jul 2026 | 105.0% | 849 |
| 23 Jul 2026 | 105.0% | 851 |
| 22 Jul 2026 | 105.0% | 852 |
| 21 Jul 2026 | 105.0% | 852 |
| 20 Jul 2026 | 105.0% | 853 |
| 19 Jul 2026 | 105.0% | 855 |
Frequently asked questions
What is the current water level of Tenkiller Lake?
As of July 30, 2026, Tenkiller Lake is at 104.8% of its capacity, holding approximately 846 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Tenkiller Lake reservoir full?
Tenkiller Lake is essentially full, sitting at 104.8% of capacity as of July 30, 2026.
Is the water level at Tenkiller Lake rising or falling?
The level at Tenkiller Lake has been broadly stable over the latest week on record (+0.2 points).
How much water can Tenkiller Lake hold?
Tenkiller Lake has a total capacity of 807 hm³.
Where is Tenkiller Lake reservoir located?
Tenkiller Lake is located in Oklahoma, United States, within the Oklahoma basin (coordinates 35.597°N, 95.049°W).
What is Tenkiller Lake used for?
Tenkiller Lake is used primarily for multiple purposes, and is managed by USACE.