Reservoir · Utah · United States · BOR RISE
Washington Lake
68.0% full
Capacity
3.34 hm³
Volume stored
2 hm³
Coordinates
40.676°N, 110.964°W
Last updated
2026-09-08
Current fill
68.0%vs 7 days ago
-3.6%losing
vs 1 year ago
+15.9%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: 2026-09-08.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 40.676, -110.964 · Open in Google Maps
About Washington Lake
As of September 8, 2026, Washington Lake is filled to 68.0% of its total capacity, holding roughly 2 hm³ of water out of a maximum 3 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has fallen by 3.6 percentage points, and it is 15.9 points above its level on the same date a year earlier.
Across the readings we hold for Washington Lake — 1823 data points between September 12, 2021 and September 8, 2026 — the level has ranged from a low of 9.0% (September 19, 2024) to a high of 90.4% (June 21, 2023). On average the reservoir is fullest around June and at its lowest around October.
It is operated by BOR primarily for multiple purposes. It lies within the Utah basin at 40.676°N, 110.964°W.
Key facts
- Current fill level
- 68.0%
- Water stored
- 2 hm³
- Total capacity
- 3 hm³
- 7-day change
- ▼ 3.6 pts
- Year-on-year
- ▲ 15.9 pts
- Primary use
- Multipurpose
- River basin
- Utah
- Operator
- BOR
- Coordinates
- 40.676°N, 110.964°W
- Last updated
- September 8, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 8 Sep 2026 | 68.0% | 2 |
| 7 Sep 2026 | 68.6% | 2 |
| 6 Sep 2026 | 69.2% | 2 |
| 5 Sep 2026 | 69.5% | 2 |
| 4 Sep 2026 | 70.1% | 2 |
| 3 Sep 2026 | 70.4% | 2 |
| 2 Sep 2026 | 71.0% | 2 |
| 1 Sep 2026 | 71.6% | 2 |
| 31 Aug 2026 | 71.9% | 2 |
| 30 Aug 2026 | 72.5% | 2 |
| 29 Aug 2026 | 72.5% | 2 |
| 28 Aug 2026 | 72.5% | 2 |