Reservoir · Oklahoma · United States · USACE CWMS
Great Salt Plains Lake
56.5% full
Capacity
60.17 hm³
Volume stored
34 hm³
Coordinates
36.744°N, 98.136°W
Last updated
2026-06-11
Current fill
56.5%vs 7 days ago
-7.0%losing
vs 1 year ago
-5.1%year-over-year
7-day trend
↓falling
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: 2026-06-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 36.744, -98.136 · Open in Google Maps
About Great Salt Plains Lake
As of June 11, 2026, Great Salt Plains Lake is filled to 56.5% of its total capacity, holding roughly 34 hm³ of water out of a maximum 60 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 7.0 percentage points, and it is 5.1 points below its level on the same date a year earlier.
Across the readings we hold for Great Salt Plains Lake — 329 data points between June 13, 2021 and June 11, 2026 — the level has ranged from a low of 48.1% (September 3, 2021) to a high of 100.0% (July 3, 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 36.744°N, 98.136°W.
Key facts
- Current fill level
- 56.5%
- Water stored
- 34 hm³
- Total capacity
- 60 hm³
- 7-day change
- ▼ 7.0 pts
- Year-on-year
- ▼ 5.1 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 36.744°N, 98.136°W
- Last updated
- June 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Jun 2026 | 56.5% | 34 |
| 10 Jun 2026 | 63.5% | 38 |
| 9 Jun 2026 | 64.6% | 39 |
| 8 Jun 2026 | 64.0% | 38 |
| 7 Jun 2026 | 63.7% | 38 |
| 6 Jun 2026 | 60.1% | 36 |
| 5 Jun 2026 | 62.9% | 38 |
| 4 Jun 2026 | 59.9% | 36 |
| 3 Jun 2026 | 61.2% | 37 |
| 2 Jun 2026 | 63.7% | 38 |
| 1 Jun 2026 | 55.6% | 33 |
| 31 May 2026 | 59.9% | 36 |
Frequently asked questions
What is the current water level of Great Salt Plains Lake?
As of June 11, 2026, Great Salt Plains Lake is at 56.5% of its capacity, holding approximately 34 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Great Salt Plains Lake reservoir full?
No. As of June 11, 2026, Great Salt Plains Lake is within its normal operating range at 56.5% of its capacity, so it is not full.
Is the water level at Great Salt Plains Lake rising or falling?
The level at Great Salt Plains Lake is falling — it dropped 7.0 percentage points over the latest week on record.
How much water can Great Salt Plains Lake hold?
Great Salt Plains Lake has a total capacity of 60 hm³.
Where is Great Salt Plains Lake reservoir located?
Great Salt Plains Lake is located in Oklahoma, United States, within the Oklahoma basin (coordinates 36.744°N, 98.136°W).
What is Great Salt Plains Lake used for?
Great Salt Plains Lake is used primarily for multiple purposes, and is managed by USACE.