Reservoir · Oregon · United States · BOR RISE
Lake Owyhee and Owyhee Dam
17.3% full
Capacity
1,381.5 hm³
Volume stored
238 hm³
Coordinates
43.642°N, 117.243°W
Last updated
2026-08-12
Current fill
17.3%vs 7 days ago
-1.8%losing
vs 1 year ago
-25.2%year-over-year
7-day trend
↓falling
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: 2026-08-12.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 43.642, -117.243 · Open in Google Maps
About Lake Owyhee and Owyhee Dam
As of August 12, 2026, Lake Owyhee and Owyhee Dam is filled to 17.3% of its total capacity, holding roughly 238 hm³ of water out of a maximum 1,382 hm³. At this level the reservoir is critically low.
Over the most recent week on record the fill level has fallen by 1.8 percentage points, and it is 25.2 points below its level on the same date a year earlier.
Across the readings we hold for Lake Owyhee and Owyhee Dam — 2184 data points between August 15, 2021 and August 12, 2026 — the level has ranged from a low of 4.5% (October 6, 2022) to a high of 63.9% (May 28, 2024). On average the reservoir is fullest around May and at its lowest around October.
It is operated by BOR primarily for multiple purposes. It lies within the Oregon basin at 43.642°N, 117.243°W.
Key facts
- Current fill level
- 17.3%
- Water stored
- 238 hm³
- Total capacity
- 1,382 hm³
- 7-day change
- ▼ 1.8 pts
- Year-on-year
- ▼ 25.2 pts
- Primary use
- Multipurpose
- River basin
- Oregon
- Operator
- BOR
- Coordinates
- 43.642°N, 117.243°W
- Last updated
- August 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Aug 2026 | 17.3% | 238 |
| 11 Aug 2026 | 17.5% | 242 |
| 10 Aug 2026 | 17.8% | 246 |
| 9 Aug 2026 | 18.0% | 249 |
| 8 Aug 2026 | 18.3% | 253 |
| 6 Aug 2026 | 18.8% | 260 |
| 5 Aug 2026 | 19.1% | 264 |
| 4 Aug 2026 | 19.3% | 267 |
| 3 Aug 2026 | 19.6% | 270 |
| 2 Aug 2026 | 19.8% | 274 |
| 30 Jul 2026 | 20.6% | 285 |
| 29 Jul 2026 | 20.9% | 288 |
Frequently asked questions
What is the current water level of Lake Owyhee and Owyhee Dam?
As of August 12, 2026, Lake Owyhee and Owyhee Dam is at 17.3% of its capacity, holding approximately 238 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Lake Owyhee and Owyhee Dam reservoir full?
No. As of August 12, 2026, Lake Owyhee and Owyhee Dam is critically low at 17.3% of its capacity, so it is not full.
Is the water level at Lake Owyhee and Owyhee Dam rising or falling?
The level at Lake Owyhee and Owyhee Dam is falling — it dropped 1.8 percentage points over the latest week on record.
How much water can Lake Owyhee and Owyhee Dam hold?
Lake Owyhee and Owyhee Dam has a total capacity of 1,382 hm³.
Where is Lake Owyhee and Owyhee Dam reservoir located?
Lake Owyhee and Owyhee Dam is located in Oregon, United States, within the Oregon basin (coordinates 43.642°N, 117.243°W).
What is Lake Owyhee and Owyhee Dam used for?
Lake Owyhee and Owyhee Dam is used primarily for multiple purposes, and is managed by BOR.