Reservoir · Oregon · United States · BOR RISE
McKay Reservoir and Dam
37.4% full
Capacity
83.63 hm³
Volume stored
31 hm³
Coordinates
45.605°N, 118.796°W
Last updated
2026-08-11
Current fill
37.4%vs 7 days ago
-2.6%losing
vs 1 year ago
-10.5%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: 2026-08-11.
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 and Dam
As of August 11, 2026, McKay Reservoir and Dam is filled to 37.4% of its total capacity, holding roughly 31 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 fallen by 2.6 percentage points, and it is 10.5 points below its level on the same date a year earlier.
Across the readings we hold for McKay Reservoir and Dam — 2188 data points between August 15, 2021 and August 11, 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
- 37.4%
- Water stored
- 31 hm³
- Total capacity
- 84 hm³
- 7-day change
- ▼ 2.6 pts
- Year-on-year
- ▼ 10.5 pts
- Primary use
- Multipurpose
- River basin
- Oregon
- Operator
- BOR
- Coordinates
- 45.605°N, 118.796°W
- Last updated
- August 11, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 11 Aug 2026 | 37.4% | 31 |
| 10 Aug 2026 | 37.8% | 32 |
| 9 Aug 2026 | 38.3% | 32 |
| 8 Aug 2026 | 38.7% | 32 |
| 7 Aug 2026 | 39.1% | 33 |
| 6 Aug 2026 | 39.4% | 33 |
| 5 Aug 2026 | 39.7% | 33 |
| 4 Aug 2026 | 40.0% | 33 |
| 3 Aug 2026 | 40.4% | 34 |
| 2 Aug 2026 | 40.7% | 34 |
| 1 Aug 2026 | 41.1% | 34 |
| 31 Jul 2026 | 41.4% | 35 |
Frequently asked questions
What is the current water level of McKay Reservoir and Dam?
As of August 11, 2026, McKay Reservoir and Dam is at 37.4% of its capacity, holding approximately 31 hm³ of water, according to BOR RISE (US Bureau of Reclamation) data.
Is McKay Reservoir and Dam reservoir full?
No. As of August 11, 2026, McKay Reservoir and Dam is low at 37.4% of its capacity, so it is not full.
Is the water level at McKay Reservoir and Dam rising or falling?
The level at McKay Reservoir and Dam is falling — it dropped 2.6 percentage points over the latest week on record.
How much water can McKay Reservoir and Dam hold?
McKay Reservoir and Dam has a total capacity of 84 hm³.
Where is McKay Reservoir and Dam reservoir located?
McKay Reservoir and Dam is located in Oregon, United States, within the Oregon basin (coordinates 45.605°N, 118.796°W).
What is McKay Reservoir and Dam used for?
McKay Reservoir and Dam is used primarily for multiple purposes, and is managed by BOR.