Reservoir · Oklahoma · United States · USACE CWMS
Great Salt Plains Lake
80.6% full
Capacity
38.76 hm³
Volume stored
31 hm³
Coordinates
36.744°N, 98.136°W
Last updated
2026-07-30
Current fill
80.6%vs 7 days ago
-0.5%losing
vs 1 year ago
-18.7%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. 36.744, -98.136 · Open in Google Maps
About Great Salt Plains Lake
As of July 30, 2026, Great Salt Plains Lake is filled to 80.6% of its total capacity, holding roughly 31 hm³ of water out of a maximum 39 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has held broadly steady (-0.5 pts), and it is 18.7 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 July 31, 2021 and July 30, 2026 — the level has ranged from a low of 74.7% (September 3, 2021) to a high of 105.0% (June 27, 2026). On average the reservoir is fullest around October 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
- 80.6%
- Water stored
- 31 hm³
- Total capacity
- 39 hm³
- 7-day change
- ▼ 0.5 pts
- Year-on-year
- ▼ 18.7 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 36.744°N, 98.136°W
- Last updated
- July 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Jul 2026 | 80.6% | 31 |
| 29 Jul 2026 | 81.1% | 31 |
| 28 Jul 2026 | 81.3% | 32 |
| 27 Jul 2026 | 83.8% | 32 |
| 26 Jul 2026 | 87.7% | 34 |
| 25 Jul 2026 | 85.0% | 33 |
| 24 Jul 2026 | 83.3% | 32 |
| 23 Jul 2026 | 80.1% | 31 |
| 22 Jul 2026 | 80.1% | 31 |
| 21 Jul 2026 | 81.6% | 32 |
| 20 Jul 2026 | 84.7% | 33 |
| 19 Jul 2026 | 86.0% | 33 |
Frequently asked questions
What is the current water level of Great Salt Plains Lake?
As of July 30, 2026, Great Salt Plains Lake is at 80.6% of its capacity, holding approximately 31 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Great Salt Plains Lake reservoir full?
No. As of July 30, 2026, Great Salt Plains Lake is high at 80.6% 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 has been broadly stable over the latest week on record (-0.5 points).
How much water can Great Salt Plains Lake hold?
Great Salt Plains Lake has a total capacity of 39 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.