Reservoir · Oklahoma · United States · USACE CWMS
Keystone Lake
47.8% full
Capacity
1,089.41 hm³
Volume stored
521 hm³
Coordinates
36.152°N, 96.252°W
Last updated
2026-07-30
Current fill
47.8%vs 7 days ago
0.0%stable
vs 1 year ago
-5.3%year-over-year
7-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: 2026-07-30.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 36.152, -96.252 · Open in Google Maps
About Keystone Lake
As of July 30, 2026, Keystone Lake is filled to 47.8% of its total capacity, holding roughly 521 hm³ of water out of a maximum 1,089 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 (+0.0 pts), and it is 5.3 points below its level on the same date a year earlier.
Across the readings we hold for Keystone Lake — 329 data points between July 31, 2021 and July 30, 2026 — the level has ranged from a low of 42.6% (February 5, 2022) to a high of 100.0% (July 1, 2026). On average the reservoir is fullest around July and at its lowest around February.
It is operated by USACE primarily for multiple purposes. It lies within the Oklahoma basin at 36.152°N, 96.252°W.
Key facts
- Current fill level
- 47.8%
- Water stored
- 521 hm³
- Total capacity
- 1,089 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 5.3 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- USACE
- Coordinates
- 36.152°N, 96.252°W
- Last updated
- July 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Jul 2026 | 47.8% | 521 |
| 29 Jul 2026 | 47.8% | 521 |
| 28 Jul 2026 | 47.8% | 520 |
| 27 Jul 2026 | 47.5% | 518 |
| 26 Jul 2026 | 48.4% | 527 |
| 25 Jul 2026 | 49.3% | 538 |
| 24 Jul 2026 | 50.4% | 549 |
| 23 Jul 2026 | 51.5% | 561 |
| 22 Jul 2026 | 53.5% | 583 |
| 21 Jul 2026 | 55.8% | 608 |
| 20 Jul 2026 | 58.3% | 635 |
| 19 Jul 2026 | 59.4% | 647 |
Frequently asked questions
What is the current water level of Keystone Lake?
As of July 30, 2026, Keystone Lake is at 47.8% of its capacity, holding approximately 521 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Keystone Lake reservoir full?
No. As of July 30, 2026, Keystone Lake is within its normal operating range at 47.8% of its capacity, so it is not full.
Is the water level at Keystone Lake rising or falling?
The level at Keystone Lake has been broadly stable over the latest week on record (0.0 points).
How much water can Keystone Lake hold?
Keystone Lake has a total capacity of 1,089 hm³.
Where is Keystone Lake reservoir located?
Keystone Lake is located in Oklahoma, United States, within the Oklahoma basin (coordinates 36.152°N, 96.252°W).
What is Keystone Lake used for?
Keystone Lake is used primarily for multiple purposes, and is managed by USACE.