Reservoir · Oregon · United States · BOR RISE
Lake Owyhee and Owyhee Dam (OWY)
21.1% full
Capacity
1,381.5 hm³
Volume stored
292 hm³
Coordinates
43.642°N, 117.243°W
Last updated
2026-07-28
Current fill
21.1%vs 7 days ago
-0.3%losing
vs 1 year ago
-13.0%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: 2026-07-28.
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 (OWY)
As of July 28, 2026, Lake Owyhee and Owyhee Dam (OWY) is filled to 21.1% of its total capacity, holding roughly 292 hm³ of water out of a maximum 1,382 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-0.3 pts), and it is 13.0 points below its level on the same date a year earlier.
Across the readings we hold for Lake Owyhee and Owyhee Dam (OWY) — 2187 data points between July 31, 2021 and July 28, 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
- 21.1%
- Water stored
- 292 hm³
- Total capacity
- 1,382 hm³
- 7-day change
- ▼ 0.3 pts
- Year-on-year
- ▼ 13.0 pts
- Primary use
- Multipurpose
- River basin
- Oregon
- Operator
- BOR
- Coordinates
- 43.642°N, 117.243°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 21.1% | 292 |
| 27 Jul 2026 | 21.4% | 296 |
| 26 Jul 2026 | 21.7% | 299 |
| 25 Jul 2026 | 21.9% | 303 |
| 24 Jul 2026 | 22.2% | 306 |
| 23 Jul 2026 | 22.4% | 310 |
| 22 Jul 2026 | 22.6% | 313 |
| 20 Jul 2026 | 23.1% | 320 |
| 19 Jul 2026 | 23.4% | 323 |
| 18 Jul 2026 | 23.6% | 326 |
| 17 Jul 2026 | 23.9% | 330 |
| 16 Jul 2026 | 24.1% | 333 |
Frequently asked questions
What is the current water level of Lake Owyhee and Owyhee Dam (OWY)?
As of July 28, 2026, Lake Owyhee and Owyhee Dam (OWY) is at 21.1% of its capacity, holding approximately 292 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Lake Owyhee and Owyhee Dam (OWY) reservoir full?
No. As of July 28, 2026, Lake Owyhee and Owyhee Dam (OWY) is low at 21.1% of its capacity, so it is not full.
Is the water level at Lake Owyhee and Owyhee Dam (OWY) rising or falling?
The level at Lake Owyhee and Owyhee Dam (OWY) has been broadly stable over the latest week on record (-0.3 points).
How much water can Lake Owyhee and Owyhee Dam (OWY) hold?
Lake Owyhee and Owyhee Dam (OWY) has a total capacity of 1,382 hm³.
Where is Lake Owyhee and Owyhee Dam (OWY) reservoir located?
Lake Owyhee and Owyhee Dam (OWY) is located in Oregon, United States, within the Oregon basin (coordinates 43.642°N, 117.243°W).
What is Lake Owyhee and Owyhee Dam (OWY) used for?
Lake Owyhee and Owyhee Dam (OWY) is used primarily for multiple purposes, and is managed by BOR.