Reservoir · Oklahoma · United States · BOR RISE
Lake Altus and Altus Dam
25.5% full
Capacity
165.9 hm³
Volume stored
42 hm³
Coordinates
34.883°N, 99.300°W
Last updated
2026-05-11
Current fill
25.5%vs 7 days ago
-0.1%losing
vs 1 year ago
+0.2%year-over-year
7-day trend
→stable
Data source: BOR RISE — US Bureau of Reclamation — 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: 2026-05-11.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 34.883, -99.300 · Open in Google Maps
About Lake Altus and Altus Dam
As of May 11, 2026, Lake Altus and Altus Dam is filled to 25.5% of its total capacity, holding roughly 42 hm³ of water out of a maximum 166 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-0.1 pts), and it sits close to where it was a year earlier.
Across the readings we hold for Lake Altus and Altus Dam — 1794 data points between June 13, 2021 and May 11, 2026 — the level has ranged from a low of 15.5% (November 19, 2021) to a high of 74.7% (July 5, 2025). On average the reservoir is fullest around July and at its lowest around October.
It is operated by BOR primarily for multiple purposes. It lies within the Oklahoma basin at 34.883°N, 99.300°W.
Key facts
- Current fill level
- 25.5%
- Water stored
- 42 hm³
- Total capacity
- 166 hm³
- 7-day change
- ▼ 0.1 pts
- Year-on-year
- ▲ 0.2 pts
- Primary use
- Multipurpose
- River basin
- Oklahoma
- Operator
- BOR
- Coordinates
- 34.883°N, 99.300°W
- Last updated
- May 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 May 2026 | 25.5% | 42 |
| 10 May 2026 | 25.6% | 42 |
| 9 May 2026 | 25.6% | 43 |
| 8 May 2026 | 25.6% | 43 |
| 7 May 2026 | 25.5% | 42 |
| 6 May 2026 | 25.7% | 43 |
| 5 May 2026 | 25.8% | 43 |
| 4 May 2026 | 25.8% | 43 |
| 3 May 2026 | 25.7% | 43 |
| 2 May 2026 | 25.8% | 43 |
| 1 May 2026 | 25.9% | 43 |
| 30 Apr 2026 | 25.9% | 43 |
Frequently asked questions
What is the current water level of Lake Altus and Altus Dam?
As of May 11, 2026, Lake Altus and Altus Dam is at 25.5% of its capacity, holding approximately 42 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Lake Altus and Altus Dam reservoir full?
No. As of May 11, 2026, Lake Altus and Altus Dam is low at 25.5% of its capacity, so it is not full.
Is the water level at Lake Altus and Altus Dam rising or falling?
The level at Lake Altus and Altus Dam has been broadly stable over the latest week on record (-0.1 points).
How much water can Lake Altus and Altus Dam hold?
Lake Altus and Altus Dam has a total capacity of 166 hm³.
Where is Lake Altus and Altus Dam reservoir located?
Lake Altus and Altus Dam is located in Oklahoma, United States, within the Oklahoma basin (coordinates 34.883°N, 99.300°W).
What is Lake Altus and Altus Dam used for?
Lake Altus and Altus Dam is used primarily for multiple purposes, and is managed by BOR.