Reservoir · Oklahoma · United States · USACE CWMS
Fort Gibson Lake
46.1% full
Capacity
1,009.66 hm³
Volume stored
466 hm³
Coordinates
35.871°N, 95.229°W
Last updated
2026-10-01
Current fill
46.1%vs 7 days ago
+1.3%gaining
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: 2026-10-01.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 35.871, -95.229 · Open in Google Maps
About Fort Gibson Lake
As of October 1, 2026, Fort Gibson Lake is filled to 46.1% of its total capacity, holding roughly 466 hm³ of water out of a maximum 1,010 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 (+1.3 pts).
Across the readings we hold for Fort Gibson Lake — 330 data points between October 2, 2021 and October 1, 2026 — the level has ranged from a low of 40.5% (September 3, 2026) to a high of 100.0% (June 28, 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 35.871°N, 95.229°W.
Key facts
- Current fill level
- 46.1%
- Water stored
- 466 hm³
- Total capacity
- 1,010 hm³
- 7-day change
- ▲ 1.3 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 35.871°N, 95.229°W
- Last updated
- October 1, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 1 Oct 2026 | 46.1% | 466 |
| 30 Sep 2026 | 46.0% | 465 |
| 29 Sep 2026 | 46.0% | 465 |
| 28 Sep 2026 | 45.4% | 458 |
| 27 Sep 2026 | 45.7% | 462 |
| 26 Sep 2026 | 45.7% | 462 |
| 25 Sep 2026 | 45.1% | 455 |
| 24 Sep 2026 | 44.8% | 452 |
| 23 Sep 2026 | 44.5% | 450 |
| 22 Sep 2026 | 44.3% | 447 |
| 21 Sep 2026 | 43.9% | 444 |
| 20 Sep 2026 | 43.5% | 439 |