Reservoir · Oregon · United States · BOR RISE
McKay Reservoir
McKay Reservoir and Dam
25.8% full
Capacity
83.63 hm³
Volume stored
22 hm³
Coordinates
45.605°N, 118.796°W
Last updated
2026-09-30
Current fill
25.8%vs 7 days ago
-1.1%losing
vs 1 year ago
-0.4%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: 2026-09-30.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 45.605, -118.796 · Open in Google Maps
About McKay Reservoir
As of September 30, 2026, McKay Reservoir is filled to 25.8% of its total capacity, holding roughly 22 hm³ of water out of a maximum 84 hm³. At this level the reservoir is low.
Over the most recent week on record the fill level has held broadly steady (-1.1 pts), and it sits close to where it was a year earlier.
Across the readings we hold for McKay Reservoir — 2189 data points between October 2, 2021 and September 30, 2026 — the level has ranged from a low of 8.0% (November 18, 2025) to a high of 99.6% (May 30, 2022). On average the reservoir is fullest around May and at its lowest around November.
It is operated by BOR primarily for multiple purposes. It lies within the Oregon basin at 45.605°N, 118.796°W.
Key facts
- Current fill level
- 25.8%
- Water stored
- 22 hm³
- Total capacity
- 84 hm³
- 7-day change
- ▼ 1.1 pts
- Year-on-year
- ▼ 0.4 pts
- Primary use
- Multipurpose
- River basin
- Oregon
- Operator
- BOR
- Coordinates
- 45.605°N, 118.796°W
- Last updated
- September 30, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 30 Sep 2026 | 25.8% | 22 |
| 29 Sep 2026 | 25.9% | 22 |
| 28 Sep 2026 | 26.1% | 22 |
| 27 Sep 2026 | 26.2% | 22 |
| 26 Sep 2026 | 26.4% | 22 |
| 25 Sep 2026 | 26.6% | 22 |
| 24 Sep 2026 | 26.7% | 22 |
| 23 Sep 2026 | 26.9% | 22 |
| 22 Sep 2026 | 27.0% | 23 |
| 21 Sep 2026 | 27.2% | 23 |
| 20 Sep 2026 | 27.4% | 23 |
| 19 Sep 2026 | 27.5% | 23 |