Reservoir · Oregon · United States · BOR RISE
Hyatt Reservoir and Dam (HYA)
40.6% full
Capacity
19.98 hm³
Volume stored
8 hm³
Coordinates
42.172°N, 122.467°W
Last updated
2026-07-28
Current fill
40.6%vs 7 days ago
-0.2%losing
vs 1 year ago
-8.5%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. 42.172, -122.467 · Open in Google Maps
About Hyatt Reservoir and Dam (HYA)
As of July 28, 2026, Hyatt Reservoir and Dam (HYA) is filled to 40.6% of its total capacity, holding roughly 8 hm³ of water out of a maximum 20 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 (-0.2 pts), and it is 8.5 points below its level on the same date a year earlier.
Across the readings we hold for Hyatt Reservoir and Dam (HYA) — 2189 data points between July 31, 2021 and July 28, 2026 — the level has ranged from a low of 1.2% (September 30, 2021) to a high of 99.7% (May 15, 2025). 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 42.172°N, 122.467°W.
Key facts
- Current fill level
- 40.6%
- Water stored
- 8 hm³
- Total capacity
- 20 hm³
- 7-day change
- ▼ 0.2 pts
- Year-on-year
- ▼ 8.5 pts
- Primary use
- Multipurpose
- River basin
- Oregon
- Operator
- BOR
- Coordinates
- 42.172°N, 122.467°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 40.6% | 8 |
| 27 Jul 2026 | 40.8% | 8 |
| 26 Jul 2026 | 41.0% | 8 |
| 25 Jul 2026 | 41.1% | 8 |
| 24 Jul 2026 | 41.4% | 8 |
| 23 Jul 2026 | 41.6% | 8 |
| 22 Jul 2026 | 41.7% | 8 |
| 21 Jul 2026 | 42.0% | 8 |
| 20 Jul 2026 | 42.1% | 8 |
| 19 Jul 2026 | 42.3% | 8 |
| 18 Jul 2026 | 42.4% | 8 |
| 17 Jul 2026 | 42.5% | 9 |
Frequently asked questions
What is the current water level of Hyatt Reservoir and Dam (HYA)?
As of July 28, 2026, Hyatt Reservoir and Dam (HYA) is at 40.6% of its capacity, holding approximately 8 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is Hyatt Reservoir and Dam (HYA) reservoir full?
No. As of July 28, 2026, Hyatt Reservoir and Dam (HYA) is within its normal operating range at 40.6% of its capacity, so it is not full.
Is the water level at Hyatt Reservoir and Dam (HYA) rising or falling?
The level at Hyatt Reservoir and Dam (HYA) has been broadly stable over the latest week on record (-0.2 points).
How much water can Hyatt Reservoir and Dam (HYA) hold?
Hyatt Reservoir and Dam (HYA) has a total capacity of 20 hm³.
Where is Hyatt Reservoir and Dam (HYA) reservoir located?
Hyatt Reservoir and Dam (HYA) is located in Oregon, United States, within the Oregon basin (coordinates 42.172°N, 122.467°W).
What is Hyatt Reservoir and Dam (HYA) used for?
Hyatt Reservoir and Dam (HYA) is used primarily for multiple purposes, and is managed by BOR.